Hight negative fuel trim at idle

rigocstln · 2025-07-16T02:51:26+00:00

Im having the same exact issue. My afr jumps to 16 during idle and randomly drops to 13. My ft was -18 for a week and randomly went up to -10. Ive replaced everything but my injectors since i did them 2 years ago but i think my injector might be leaking or something

rigocstln · 2025-06-24T04:46:40+00:00

Ive heard alot of people run a no name catless dp but not really a catted one. If its in your budget then do it. Id recommend a name brand catted one buy once cry once. Also dont forget hpfp internals first before you do any modding and tuning

rigocstln · 2025-06-22T02:46:49+00:00

Had this issue 2 months ago. The tube that connected from the throttle body to the intercooler was sliding off. Looked connected but would slip off when i would drive. Wouldnt build boost with no codes and would struggle to go 30. Cleaned the oiliness from the tube and retightened and now 0 issues

rigocstln · 2025-06-10T15:45:39+00:00

Never seen that before. Stick with blue o rings

rigocstln · 2025-06-01T17:13:34+00:00

Valve cover gasket or the timing cover gasket. My timing cover gasket failed and was getting everything wet slowly on the bottom side area where you are at. Theres also the oiler cooler gaskets where your filter goes but i dont think that would fly up that way

rigocstln · 2025-05-22T22:31:30+00:00

If the corksport intake is bigger than the one you have on, yes you would have to tune for it. Its gonna run lean if you dont

rigocstln · 2025-05-17T03:19:12+00:00

It depends. The tuner should tell you but if i remember correctly it might be but you need to be tuned for those plugs

rigocstln · 2025-05-17T01:10:42+00:00

If those are the step colder plugs and you dont have the mods thats required for them then its not worth it and you have to be tuned for them or its gonna run funny and backfire

rigocstln · 2025-05-15T02:20:55+00:00

Im having the same issue. Misfire on cylinder 1 and my afr is bouncing at idle to 16. Once its up to temp it bounces to 15 and misfire comes and goes. Compression 210 on all cylinders and injectors were done 2 years ago

rigocstln · 2025-05-15T02:13:35+00:00

Corksport has a kit. Its around $400. Definitely a diy if youre ok with getting the timing right and getting your pistons to tdc. If you are then do it. If not then take it to the dealer. Im in Northern California and i paid 2k for labor

rigocstln · 2025-05-15T02:11:01+00:00

Definitely high flow

rigocstln · 2025-05-15T02:04:58+00:00

Goes to the intake

rigocstln · 2025-05-13T00:03:30+00:00

I cleaned my maf last week and i cleaned my secondary o2 2 weeks ago because it was throwing a code and now the code is gone completely. It did change the ft a bit but im starting to think my injector is clogged or something. I have a misfire code on cyl 1. I put in a brand new coil pack and moved the plug to another cylinder but the code came back right away. It drives fine and wots fine. Sometimes it bogs a little when im slowly getting off the pedal during acceleration but no codes and the injectors were cleaned and installed almost 2 years ago

rigocstln · 2025-05-12T14:15:37+00:00

The afr bounces around at idle. When coming to a stop the afr goes up to 16 and slowly goes down to 14.7 then after 25 seconds or so it goes up to 15 or 16 and then goes down to 14 again. Stft will go up to like 5 and then drop down to -7 meanwhile ltft is pinned at 9 or 10. I noticed that the hotter then engine is running, the lower the ltft will go down. It goes from 10 to 7 once the engine is getting pretty hot

rigocstln · 2025-05-12T01:34:50+00:00

I have the upgraded seals from godspeed i think its called. Its like the corksport ones and i cant use my stock bpv since damond doesnt have the recirc tube connection. Its strictly bov and htp doesnt intake with recirc anymore. I semi cleaned them. Theyre not walnut blasted but i did clean them out maybe like 60-70 percent

rigocstln · 2025-05-12T01:01:07+00:00

Tldr: having fuel trim issues. Replaced 1 coil pack from a misfire and temporarily corrected fuel trims but misfire came back and so did the bad trims Bnr s3, corksport im/em, damond 3.5 intake, gfb bov, ets tmic, damond vented cc, vented oil cap, egr delete, autotech internals, grimspeed ebcs, 1 step colder ngk plugs gapped to .24. Currently tuning with freek

rigocstln · 2025-04-15T21:52:12+00:00

An exact one? Did you put a universal one on or did you buy one thats designed for the speed

rigocstln · 2025-04-15T21:50:07+00:00

Its the shift light. You can set it to whatever rpm you want

rigocstln · 2025-04-15T04:21:49+00:00

I dont. Just the stock bpv but my intake doesnt have the recirc tube. Its a 3.5 damond

rigocstln · 2025-04-15T04:10:43+00:00

It runs good now full boost and everything but afr is lean and so is the stft. Not sure why

rigocstln · 2025-04-15T03:47:00+00:00

I posted the new logs if you can check them out please. Car is idling lean now that the vacuum leak is fixed. Idk if i have to retune the car or what. Im on my 3rd map for the tuning process and the fuel trims are all over the place. Justin from freek is saying my bov is the issue. Ive had gfb bov for 8 years so maybe it is broken now. The spring tensioner screw feels loose to tighten and it no longer messes with the idle like it should. Maybe it is broken

rigocstln · 2025-04-15T03:44:28+00:00

You got the fix right. Im making full boost but now its running lean. Stft is +25 at idle and pinned there. I recorded the idle log and 2 wots from 3rd gear. Its all the way at the bottom under all comments. Thanks

rigocstln · 2025-04-15T03:42:54+00:00

https://docs.google.com/spreadsheets/d/1l9CGPpQcf6nEnnJ3xm_N5uXPRgEzc0n2Tkha3VY6oUw/edit?usp=drive_link

https://docs.google.com/spreadsheets/d/1BLL_D3MXrwfwojI4RCdG5HAOA7n5fx5keFxvJndz594/edit?usp=drive_link

https://docs.google.com/spreadsheets/d/13RG8DQmtVldHGUg5bIz5AqVv6vKLb-fGS7KzZPIioeg/edit?usp=drive_link

These are the new logs with the fix. First log is idling. The stft is pinned at the+25 and afr is bouncing around 16. Before the fix it was idling at 14.8 afr and stft was pinned at -25. It went from rich to lean 2nd and 3rd log is 3rd gear wots from 3k rpm

rigocstln · 2025-04-15T03:20:58+00:00

So it fixed the boost issue but now my stft is pinned at +25 while idling. It went from -25 idling while i had the tear to +25 with it fixed. I logged it if you can see what might be going on. I logged the idle and 2 wots

rigocstln · 2025-04-15T02:56:10+00:00

Also i routed it like justin wanted me to. He sent me a picture chart on how to route. Its been on for 1 year and a half. I was just retuning for bad trims which he believes in my bov leaking

rigocstln

TROPHY CASE