The_big_dill
Greenie Member
If there is excessive gas in the oil, the most likely cause on these cars is the PCV system is struggling to evacuate the gas vapors OR there is an excessive amount of gas getting in the oil.
Help diagnosing negative fuel trims/ P2178 / P2188 Rich off/at idle codes
- Thread starter Mike117
- Start date
- Watchers 8
If there is excessive gas in the oil, the most likely cause on these cars is the PCV system is struggling to evacuate the gas vapors OR there is an excessive amount of gas getting in the oil.
HPFP seals could be leaking gas into your oil. There is a How To thread here in the forums.
If they are leaking, the gas smell will come a few miles after an oil change.
atorres
Greenie Member
I dont believe it was significant amounts but i am going to change the pcv tomorrow regardless.
atorres
Greenie Member
yeah I just did an oil change like 3 days ago and it does kinda smell like oil. would this affect my fuel trims or act fuel pressure if it was ?
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Your LTFT's will be very negative, mine at one point dropped to -20. In your WOT logs you will notice a piint where your fuel pressure will drop suddenly and then try to pick up again.
atorres
Greenie Member
my Ltft were never -20 on idle or cruising it’s actually the opposite. It ranges from -0.16 to 20
You need to check for some kind of vacuum leak in your car. If its adding that much fuel there is something wrong with your setup.
atorres
Greenie Member
Yeah I’ll do another data log just to be sure but I am running lean on idle (p2187 )so idk.
TE27
Greenie N00B Member
Hi OP did you ever resolve the issue ? I'm having the same issue with my Speed. We check boost and vacuum leak, replaced MAP sensor and O2 sensor, cleaned valves and changed injector seals. I'm still having the same issue rich at idle CEL 2188. Now I have no idea where to look. Any help or suggestions is greatly appreciated.
Cwspeed3
Greenie N00B Member
im getting the same two codes and ive done just about everything in this forum other than mafcal but thats cause i dont have atr im pretty new to tuner cars and struggling with some of the reading of my logs. if anyone could look at them that would be great because the car is basically undriveable 1st and 2nd stumble and barely get going and build boost slowly but it sounds like its getting shot out of the waste gate instantly.in higher gears it dosnt stumble but it doesnt pull like it used too and im hitting a wall as far as my daig knowledge goes
JohnnyTightlips
Motorhead
What are your mods, when did it start doing it?
Cwspeed3
Greenie N00B Member
i got the car with a tune from custom tune from freaktune. the car has CPE nano intake, JBR oil catch can, Grimmspeed ebcs 2 port setup, jbr fmic piping, treadstone tr8 fmic, ngk iridium IX LTR71X-11. started a couple of days ago took it to a shop because its been awhile since i worked on a car, they blamed my tune and did no further diag, i currently have an open thread with much more detail
