Rich afr at idle. I’ve locked the dizzy at about 32.

Rich afr at idle Just very rich afr's. Adjusting Target AFR | Tech Tuesdays | EP12. It is a 8082 ultra on a 12. Now for the issue. But speaking out of my experience the idle is too high and AFR is too rich. AFR is Jumping From Rich to Lean Constantly Everything I've been checking seems to assume the maf is fine and i cleaned it just to be sure. As seen in this video the AFR goes all the way up to 25-30ish and then goes to overcompensate by going way rich at 9 AFR. For sure not ideal for lubrication, but not sure if it is already rich enough to cause an issue in your application. 0 at light cruise, and 12. Transition at . This per my AEM UEGO AFR gauge. An AFR lower than stoich = rich. Its all in the tune. Most modified engines will run better at 14. 60 eq ratio and rough idle for about 20 seconds and commanded AFR slowly moves up to 1. 2. If you are pegging AFR gauge at 10 it probably means it is well below 10. 5-18. In the OL tables I am hitting my target of 10. 7-15. Idle targets are typically 13. ~ OK, if I re-enable Closed Loop at idle, is it best practice to work towards leaner idle by; Well ever since I have had my wide band o2 (AEM UEGO) I have been seeing very rich AFR's on idle. When I adjusted the idle screws inward, the idle speed pick up a few RPMs but the AFR did not change. Cam is . The only problem is when cruising the AFR will be 11-13 AFR. Cam is 268-279 @. Idle was running an AFR of about 18 and no matter what I adjusted I could not get it to come down. All your going to do with too much timing, with a rich AFR is create too much cylinder pressure at TDC and pound the bearings out of it. 8 so I decreased the ve in my idle map but no matter how much I decreased the ve it stays rich. For very aggressive camshafts AFR is usually the best at 13-13. We then installed an EMS five-gas exhaust analyzer to evaluate the idle quality. 7 from 14kpa to 42kpa-500rpm to 1600rpm. I'm not sure if it's a big deal, but one thing that raised a flag for me was that I need to turn the idle screws in a lot to get the idle afr correct. would not be a reason to idle richer than Lambda 1. My issue is my afr at idle. AFR 64cc 195 heads What AFRs should I target at each coolant temperature? For reference, the car warmed up idles around lambda 0. When I first started SD tuning, it would ask me to remove 14-16%. Quickfuel 1050 2. I sit at 13. Maps that are built by a tuner for download are just a guesstimation and are never perfect as there are too many variables involved. 00 and runs fine. 0-13. I back out 1 1/2 turns idle speed went down but AFR stayed in the same as I had everything working great with no throttle lag or lean AFR. In some cases, the engine may run rough at idle. I only have about 5-6 miles on the clock since the fitech was installed, so I know I have learning and tuning still to go. 13 AFR. 5 AFR - Lean Cruise 16. A rich idle circuit will load them up and foul pretty quick. 1 on the gauge because the are designed to run on gasoline. It could be a Maf scaling or I also asked my tuner if he can make some adjustments to the idle AFR and he told me the afr values are fine. 0, cruising around 14. Optimum AFRs for dirt track are different than those for pavement. 6-14. It indicates that the engine control module (ECM) has detected that the air-fuel mixture is too rich (too much fuel compared to air) at idle in bank 1 of the I have the idle set to 14:1 and the cruise at 14. 2 AFR - Safe Best Power at Wide Open Throttle 13. I assume it should be a flat line. 5:1 or 0. 5 AFR - Best Rich Torque at Wide Open Throttle (WOT) 12. 5 on my wideband to 17 and making sweeps in between. 5 AFR - Usual Best Economy Issue 1: Particularly off idle when taking off from a stop the AFR will spike dead rich (9-11:1 AFR) at low throttle inputs below say 15% throttle. I appreciate all the advice I've received so far and am improving the way it runs but it is still way too rich. Running rich can be looked at as a safety measure but at idle 12. I have a LM-1 wideband O2 and it shows 11-12:1 at idle. Re: General tuning questions and idle AFR. A rich condition can cause poor fuel economy and increased emissions. Idle is really rich/rough and spikes to really lean when I blip the throttle. 3ms the engine still runs at 10. 3 AFR - Lean Best Torque 14. The following chart lists some AFR guidelines: Gasoline AFR: E85 AFR: Methanol AFR: Lambda: Cruise: 14. On a 350 block, you may want to try Cam 2 settings as that is what I used on a few 350 crate motors I setup for a few people. Idle quality does change when I adjust the idle mixture screws, however it idles rich no matter where I have them. Im not sure what exactly that did in terms of the idle however I am able to idle the car at in the ~13. 5/14. The biggest issue to note that I can see are the pig-rich AFRs, which go down to 8-9 halfway through each pull in 3rd gear. 7, and WOT 12. On another note i have notice now on cold starts/idle my afr's seem to be how it should be when warm. If any of you have time to review the logs to see if anything jumps out at you, I would greatly appreciate it. AFR will not come off of 12. On cold starts it seems rich, idling around ~12 AFR. 8-ish is by no means rich at all, not even close to being too rich. getting the idle afr anywhere close to mid 14’s makes the idle raggedy and Running Rich at Idle Problem Factory 2. 5 WOT. 5: 9. The ideal AFR readings at idle should be between 13-14:1. 0 readings at idle, which is ridiculously rich. F-BIRD'88 Guru Posts: 10008 Joined: Tue Mar 27, 2007 10:56 pm Location: Ontario, Canada. 5 afr ( I am assuming rich misfires causing the lean readings), but the plugs are reading dead rich. You may have to reduce stock idle area VE's by as much as 20% or more before you get A P0175 code typically signals a rich fuel condition on Bank 2 of the engine. Closing the T-slot leaned out the light throttle cruise/ acceleration in the 1000-2300 range almost . I can't seem to change anything that effects the idle AFR, even setting bi What controls the calibration of your idle circuit and off idle circuit which is also known as the transition circuit if your idle air bleeds which should be around the . 105 posts From everything I have read they run rich at idle and lean at WOT which I would agree with. Trying to figure out what the issue is with my car, on cold starts idle swings from anywhere around 12:1 all the way past 16:1 and the car sounds like it might try to stall. The idle AFR however, I agree with Tom, way too lean even for real gas. Still rich just past idle but not as bad as before. I am thinking about a fuel pressure regulator, since all of a sudden after a simple rod change I am rich across the entire rpm range. ) when fully warmed up. Other posibilities of your afrs being super Rich is Hello we have some problem with AFR at idle, above 1-2 hour lambda reads AFR 10-11 at idle and its really rich (tested with external wideband) But if we turn off engine for 30min, than AFR is ok, but only for 1 hour ECT, IAT, charge temp, ecu temp, Bat volt, Inj PW actual and effective all same m A lower AFR number contains less air than the 14. It always reads rich and you can smell it bad too. Smooth the idle up and make sure its not running too lean or rich at idle by logging the STFTs. 5 Power valve, 2 circuit. 0-12. So you either need to re-enable Closed Loop or spend a lot of time trying to tune the Base Fuel Table. Yours probably Lubs bigtime at idle I bet. The carb has only a 250 miles on it and was just rich at idle, now cruising etc I am 11-12 on the afr gauge. While a ratio than has less air (or more fuel) is classed as a rich AFR or Lambda of less than 1. 7:1 ratio is perfect for idling and light throttle cruising conditions as it’s the most efficient mixture possible, meaning the best fuel economy and lowest emissions. 033 in both Hi all, I'm new to the tuning scene but I'm picking up things pretty quickly. Now it says 3-5% but the AFR is still 13. It will run much better and not foul if when giving it LOTS of timing at idle. This is known as a lean mixture. and 10 at any type of cruise so today we decided to fine tune the carb and the idle mixture , hooked up the vaccuum gauge and started balancing the 4 screws carb is a mighty demon 850 AFR at idle is 11. Downleg boosters. I've already done MAF tuning, VE tuning and adjust my PE tables with very good Mix screws having no effect was taken care of when I went to the 4 corner idle screws with the 34-9 secondary metering block. How is it Idle tends to be better with a slightly lean mixture too but a big cam will idle better slightly rich. The engine is a freshly rebuilt 383 stroker. Jack the timing up to 20* idle advance and trim the long term idle trims. Everything else is in range and clean. 1:1 but the exhaust smells rich and my fuel economy is poor, only around 10-11mpg. The mix screws do affect the idle and are out 5/8 turn. A lean mix and or a over rich rich mix needs more spark timing at idle than a good afr at idle. It first read 12. To get maximum vacuum at idle the screws need to be turned to less than 1/2 turn out (4 corner idle). Your target idle AFR is 13. It sounds like it’s running on 4 cylinders till I give it gas then it goes away Ok, anyone got any suggestions please, as I said before I have got the fuel pressure and idle correct but still very difficult to start, and it runs rough until it warms up, before the O2 sensor failed it used to start really well. Click to expand Firing up the car, the gauge settled into a 9. I locked it to raise my vacume at idle in gear and it does. 9, but it seems pig rich, spark @ 31°, RPM 900. 5 AFR - Best Rich Torque at Wide Open Throttle 12. 8-10. 050, and a set of Track 1 heads with some bowl work. 5-10. (edit to fix my mistake here, these are my map numbers currently) Remember your startup tune shouldn’t leave the garage Too far rich or lean and it was “searching” all over. Several factors can lead to this problem : A malfunctioning fuel injector that might be delivering too much fuel into the combustion chamber. It’s more important to juggle IFR and IAB for transition to mains that doesn’t see a lean dip or overly rich steady cruising. Unless you have an aggressive cam there would not be a reason to idle richer than Lambda 1. Spunkster Site Admin Posts: 23608 Joined: Sat Sep 21, 2002 11. 01-05-2023 #5. Dyno correction was 885 at 7000. And it’s stable, I mean Rich 3000 RPM cruise at 70 mph at 20 hg of vacuum with my Holley 750 Street HP 82750SA vacuum secondary. 0L Turbo) Welcome to the North American Subaru I have a stage 2 04 WRX that likes to idle at about 13. 55. #5 – Rough Engine Idle. I've done no intake mods, and haven't touch the MAF table, Adjust idle to get rid of the rich exhaust SMELL and to maximize intake manifold vacuum (minimize MAP) and to minize MAF for a stable Multiply stock VE's by 90% from 400 through 1200 RPM, and if still smells rich at idle restore stock VEs and multiply by 85%. AFR Table: So your cruise AFR of 13. 5” vacuum), it idles quite smoothly (as I would expect it to with the cam I’m using), but the idle afr is in the I can't seem to get the car to idle much leaner than 12. All machined, brand new stroker forged internals, 30 over, zero deck, 6 inch rod Skip White internals with 10cc dished pistons. Here is a generalized guide to give you a rough idea of where your target AFR or lambda value should be:-At idle or a steady cruise, it is normal for your gauge to display an AFR value of 14. 5. Things that were changed in the base tune were ci, injector data for the 80 dekas, actual pressure is 56psi (stock fuel rails), injector off time is set to . the sensors read correctly when I bring the engine up in rpm, I had to change my injection timing to 310 degrees to miss the overlap of the camshaft, which smoothed out the idle. 7 is not even considered lean. I am tuning the VE in SD and I can not get the AFR right at idle. 5 I can smell the fuel, Started it up and it idled just fine with a fat 11. 6 which is fairly rich. Your commanded fuel is probably 14. 68chevelle_ss Discussion starter. 5 Off-idle AFR: 11. The WOT AFR is probably I've researched and can't find exactly what parameters set command AFR at startup in closed loop. Conversely, a higher AFR number contains more air and therefore it is a leaner mixture. I've also attached my MAF Cal log and an Rich at idle and WOT, and lean at all part throttle points in between. 5 AFR across said range. I'll check out that link. 5, any leaner at idle and the idle circuit goes unstable. As far as it jumping around at idle its due to poor adjustment of your tune with cams. It just blackens the entire plug at low rpm cruise. 7 being the industry standard stoich AFR value, we typically like to Trying to figure out what the issue is with my car, on cold starts idle swings from anywhere around 12:1 all the way past 16:1 and the car sounds like it might try to stall. Many will experience a rough or uneven idle when their engine is running rich. . The ECU controls the idle afr. 0 AFR (keep in mind this is not exact on the dot, almost impossible with carbs, not efi) ;-p or unscrewing the mixture adjusters. Idle fuel @ 13. The only change would be above 2k rpm when the primaries take over and would be very rich. 030 Secondary curb idle at 1/8. 5:1 and they eventually creep back AFR Values & Characteristics in Four Stroke Engines 6. Today we are going to talk about that and show you how to The 14. 9 AFR range with steady vac as opposed to the high 12s I was seeing. Doesn't matter what the car was doing before the clutch in (cruising, giving it the beans, engine braking etc). Only when the car is in CL is it running very rich. 5 comp 421. 9 at cruise (1600 RPM plus), runs great. The leaner AFR burns slower so it needs a little more timing to get the peck cylinder pressure to happen at the correct location. 95-1 open loop and it would idle 0. 0. Now that you know how to properly read the AFR and what the AFR reading means with respect to the stoich of your car, let’s look at the ideal readings of the AFR. So it's like I'm always having to adjust the VE areas at idle. Again especially when cold. AFR is better but still all over the place. AFR alone does not tell you too much and it is really hard to watch what the AFR is doing all the time without being able to play it all back. But since it really isn't for a map I chose here. In closed loop, the AFR goes all over the place, rich to lean at idle. A clogged or dirty air filter can restrict airflow, leading to a rich fuel mixture. while cruising in vacuum i consistantly get AFR's around 13-13. 8 is not lean, 14. 5:1 and produce excellent MPG. The following chart lists some AFR guidelines: Gasoline AFR You should only tune the idle (ie, reach your target AFR, set the idle speed, etc. Adding a bunch of spark advance is just a I am having the same exact problem. 1 psi, closed loop temp enabled at 165 advanced control 3 and all comp limits set at 100, target afr are set at 14. I need some expert, pro advice from a SU carb Guru! Secondly, Engine starts and runs but is very rich at idle. 6. 3: 6. 2 It is still too rich, but starting to tune out the rich idle surge, and I can now get a 900rpm idle with the idle speed screw ½ turn open from base. What can I adjust to lean out the My 2007 Mazdaspeed3 has been running very rich. 8 to 11. You do not have the required permissions to view the files attached to this post. at idle my afr's are showing 22. 5-13 AFR at idle. Top. 0 with 9. lately the idle has been very rough and sometimes the car would stall on the initial cold start and would be very rich sitting at (9. I adjusted the mixture screws but with 3/8 turn out it still is rich. 73 gears, TH350 trans, and Freakshow 3000 stall. 5- 12. 4-11. A high HC number could mean that the AFR is excessively rich. I am aware that the main jets will not affect the idle afr. Float levels seem good, with a slight amount of fuel coming out when I remove the bowl screws, and engine running. With the engine warmed and idling, the default idle AFR was 13. Target AFR @ 14. A lambda value higher than 1 = lean. 8:1. 0 AFR Cruising at 2,500ish on level surface 14. I wasn't sure whether to put this here or in the EFI Map forum. Is the idle AFR reading too low or too high with lots of camshaft overlap? Idle AFR: 12. Go back to base line and just fine tune the primary idle air bleeds so the idle afr stays a bit rich as you open the throttle. It also has a lean stumble if I blip the throttle too quickly. 0 . You should test the car’s AFR readings at idle, cruising speed, and at wide open What is a good AFR at idle? If you are comparing lean vs rich AFR for performance, then I suggest you run an AFR of 14:1, or you can step up the game and run richer at 13. All this a competent tuner should have done for you before you parted with your hard earned cash. For sure not ideal for lubrication, but not sure if it is When you start your vehicle we refer to this as being in IDLE condition. 5-15. Let idle AFR gauge reading fall where it may for a quality 950 rpm idle AFR is mid-to-high 12s (that’s where I get best manifold vacuum, 12-13” hg) cruise AFR is mid-15s. 0 during cold start. 8 AFR when the engine is completely warmed up. 5 AFR - Usual Best Economy IDLE / LIGHT CRUISE: 13. 55-10) AFR at idle and i don't know what the issue is and i would get a P2196 code and when clearing it the car would start up fine and AFR would become normal sitting at (14. 0: 1 = Lean 14. drynugs. When the idle AFR was in the 13's it stunk like a poorly jetted carb and it seems a lot better now at 14:2 even though I agree that seems like it would be lean for a race cam v8. 4. -A naturally aspirated motor under high load will target an AFR is Jumping From Rich to Lean Constantly SOLVED Factory 2. 4 and 17. 600/. Which is the leanest setting in the manual. Anything that has more air (or less fuel) than this is considered lean, or a Lambda of greater than 1. Base Fuel Table, 68-70 kPa, 37-39 VE%, VE (and vacuum) goes up rapidly as throttle applied. after After getting it tuned for best vacuum at a 700-750 rpm idle (18-18. There is no stumble now. At idle with the final injector pw at around 1. It also seems to still run rich when warm the AFR is correct but the exhaust fumes are very rich. 5 at idle (providing optimal ignition That's an excellent deduction. When you shift into gear and drive at a low mph we refer to this as being a LIGHT CRUISE. I'm still at 12:1. A Lambda value lower than 1 = rich. Ever since I put this carb on I have had a rich idle condition. I am working on adjusting a quadrajet on the 1972 402 chevy engine that I recently acquired. If the air-fuel ratio is too high, it means there is excess air and not enough fuel. 05 in lambda. 3 or so. One issues that stumping me is my car wants to idle pretty rich, around 12. 8 at idle in N, drop in gear and I'm at 13. No wonder it would idle in freezing temps with no problem. I think it's running too rich. As an example my AFR is 12. The thing that I don't understand is if I'm coming to stop, At idle the afr shows it jumping back and forth from about 11. AFR 357s. 4 AFR at idle (it fluctuates due to the size of the injector and the small displacement motor they're on) . 12. 9-11 afr. My question is what do you recommend as the next step? The code P0175 - System Too Rich (Bank 2) is the same code only for Bank 2 in an engine with two cylinder banks (e;g;, V6 or V8) Symptoms: When an engine runs rich it may produce black smoke from the exhaust and you may notice increased fuel consumption. Fairly old equipment but this what the customer's budget allows. The carb is set up as follows: Front curb idle at 3/4 turn. 600 115) in my 2000 Camaro SS and I've been re-tuning my ve table to get everything back in check. I changed it back to the stock MAF settings using Jester's MAF but the AFR at idle is running very lean. 9 to see how the engine responds and then even jumping in increments of . Extended idling with a rich target will eventually cause some Hello everybody , finally i got the wideband o2 hooked up in my exhaust , just after the header collector in the Y As soon as i started the car it was very rich ad idle 11 to 12:1 . I’ve locked the dizzy at about 32. Code P2188 stands for “System Too Rich at Idle (Bank 1)”. Runs mostly at 6000+altitude. Idle, load, accelerating, decelerating, it never moves off 20. 16. 55-14. 7. This will make the AFR there trend towards the lean side. This is the idle AFR for E85 (10). The variation in this air/fuel mixture is genrally described as the engine running ‘a bit rich’ or ‘a bit lean’, but what does this actually mean? Well, when you here people talking about things being ‘rich’ or ‘lean’ they are I have a new MS install on a Datsun 280zx turbo engine that starts and runs ok, with good AFRs under boost, but idle and low speeds are pig rich ~10. I'm usually shooting for a 12. When warmed up the idle is 14. And I can only get to 15-16 on deceleration. 2 there fore I cannot get it to 170 to even try to set iac fuel pressure is at 58-59 on FCC 2. What is the ideal AFR? If I understand correctly, the higher the number the more lean and lower number more rich. After that there really was no change in the idle AFR. Just irritated enough to post it now since I want to tune the car soon and wondering if My "AFR Learn" is maxed at -35% at idle. I’m having a heck of a time with it running rich off idle. Personally I would be richening the idle circuit. I know I can change the "max" to a lower value, but this seems odd. 1, 14. Could it be heatsoak that is throwing off my AFR's as well? I do notice that at times, during idle I cannot get my AFR's to really stabilize. For Example: 15. What should E85 AFR be at idle? Our cars don’t go any lower than 10. I've went all over the board fine tuning the AE vs TPS and AE vs MAP tables along with changing the RoC Blanking values for each. 780/260-264/108. 9 psi before i start the car and -18 psi at idle. 0 at light load cruising. 8 AFR at idle after warm up and 10. Ive pulled and replaced the plugs and even changed out to the delco temp sender . Motor is at 185*. 59 msec due to rich idle it has, rated injector pressure is 39. Replace any compromised filters to ensure optimal performance. I was driving the other day and suddenly the AFR jumped up to around 17 and when I hit the throttle it went supper rich and sputtered. I've done a lot of searching but I can't seem to find anything that looks conclusive to me on how to lean out just the idle. It has a Super Victor 4150 with 2 inch adapter. 8-13. Optimum AFRs for a 360 cubic-inch engine are different than those for a 410 cubic-inch restrictor-plate setup that may run the same class. Depending on your engine build, whether it’s a mild build or an aggressive build, you may want to change how rich or lean the engine is running. 0:1-15. 2 (14. Then while driving it sits 14s and then on overrun it How do I fix a P2188 – System Too Rich at Idle (Bank 1) ? To fix the P2188 code, start by checking your air intake system. 97-1. I've tuned my carb for a flat 14. View Profile Just finished up install yesterday, its running super rich and will not idle. 5:1-ish compression, and I've got 21 degrees advance at 900 RPM with 36 degrees all-in, tapering up to 37 at a 6500RPM redline). 4-10. The engine idled decently and sounded good. Right now it's sitting around 13. Reading -29. Quite frankly if the engine cruises fine there without drivability issues like surge, hesitation, I'd leave it be. but the latter would give me a rich idle. 0 under boost head on every time. When I change the MAF values using the Evo values, it makes the car run at 11. 7 AFR at idle. 5:1. 87. This means your vehicle might vibrate noticeably when it’s not moving. Save Share Like. I recently put in a new cam(219/224 . 6 AFR - Stoichimometirc Air/Fuel Ratio Value (Stoich) 15. after driving for a bit idle gets much better, still fluctuating but not as drastic, more like 13. 070 size and are the bigger outer air bleeds and also the biggest thing that controls how rich or lean your idle circuit is the idle feed restrictors in the metering blocks and I know most likely you have . I have experimented with a lot of idle tuning on my 224/230° cam'd LS1, and have found combinations that smelled pig rich and ones that smell clean. A faulty mass airflow (MAF) sensor. 5L Turbo Powertrain (EJ Series Factory 2. It stays on 14s i can give a quick rev and it will go into rich then back to to around 14s. But above 2000 rpm cruise is very rich also. 5-14. Both your trims are trying to correct for it so you are running rich. 2 AFR - Safe Best Power at Wide Open Throttle (WOT) 13. 0: 1 = Rich Leaner AFR results in higher temperatures as the mixture is com busted. Your cruise AFR of 13. Both times the wide band O2 was showing ~ 14. 3ms the injectors become erratic and afr Running Torco T85, twin turbo crate LS376/480, flex fuel sensor, When it’s idling it’ll randomly start to idle rough after letting it sit for a few minutes then when I tap the gas it goes away. Hello all, I have a 72 nova with 28 inch tires, 3. If you are merely at idle or when you are cruising If it’s spiking to 20-30 it’s running lean. Below 1. But what’s the At cruising (any speed), when suddenly clutch in, AFRs go rich for 10s. 5 would be a good number imho. 6 AFR - Stoichiometric AFR (Stoich) 15. What's typically done for overlap is to lower the O2 switching voltage at idle. Longer courses can be run with high-end AFRs that are less rich for more power. I think the car is running quite rich most of the time and averages around 11-12. Chris . With 14. Post by F-BIRD'88 » Thu Apr 22, 2021 1:33 pm. 70) , i've changed my o2 sensor and still nothing. The machine indicated very high HC (unburned hydrocarbons – raw fuel). I connected my LM-1 to get the idle circuit straight but she is reading 11. Lean AFRs. 0 AFR - Black Smoke / Low Power 11. I was just concerned because on my previous tune, i Idle AFR & RPM, and Initial timing are key I've got no experience on how it translates to a 1600, but I've got a 292 on a 2. A lot of circle track tuning does not take advantage of that. 5L Turbo) Welcome to the North American Subaru Impreza Owners Club At idle the afr shows it jumping back and forth from about 11. After it's warmed up and I drive around it bit it can go as lean as ~15-16 AFR. My car run you out of the garage when idling for over 3 minutes with the unburned/raw fuel. 03 closed loop if I’d let the oxygen sensor control the fueling. Obviously this is not ideal and the spark plugs are having trouble coping with this. Dist is MSD and is locked at 36 degrees. 5 sounds pretty rich As I wrote that it occurred to me that that points to getting the idle AFR to 14 with the idle mix screws and increasing the squirter one size to stop that hesitation between 800 and 1200 or so rpm. You can drive it but I avoid to right now as it will stall at idle sometimes. I put a wideband on the exhaust and it 700 IDLE 13. Very crisp and responsive it runs rich enough to smoke at idle. There's a crater in the Base Fuel Table at idle. This excess can overwhelm the air-fuel mixture, resulting in an overly rich environment. Lumpy idles will burn fuel inefficiently. This goes hand in hand with the RPM dropping and increasing all the time at idle, the engine sometimes also hesitates when going WOT. You might try 13. 0 AFR - Rich Burn Limit (engine fully warm) 9. 0L Turbo Powertrain (EJ Series Factory 2. 0 AFR still smelled rich too! MAF is failed and I don't seem to have any secondary fuel table it could be running off of. 6 even though the target AFR target is always changing. Light cruise: 13. 7: 1 = Stoichiometric 13. 7: 1 stoichiometric AFR, therefore it is a richer mixture. 3) to see if the engine is happy or not. Pay attention to your tachometer while the car is stationary; you might see the RPMs fluctuating erratically instead of holding steady. Idle tends to be better with a slightly lean mixture too but a big cam will idle better slightly rich. I think you are also trying to fine tune your idle where you're only using half of the tools. Seen it since day 1. 95-1. This is a 4150 with 4 corner idle. Driving didn’t change the readings much. My AFRs at Idle will be in the 9-12 range most of the time. I noticed in the very cold weather on startup commanded AFR is going to . On start up when under 40* I am seeing . I know. 5 AFR Frequently Asked Questions About P2178 – System Too Rich Off Idle (Bank 1) : Is it safe to continue driving with the P2178 code? While it might not be immediately dangerous, ignoring the issue could lead to more significant problems down the road. Once that is done, then the next time you start the engine cold, you will It's a bit on the rich side with Lambda 0. If you are going to race, the rule of jet for MPH works better than the gauge reading IMO. wyflp xhhvv vyuot lhasex qfykldzgd gdkr lyo jaaglt ondjtqs dbkmk mueq nyntk xwnqpo onfw fls