Running really lean
 

This just started happening about a week ago. I keep throwing a lean bank one 1 code. I've never thrown that code before , it was always rich. But I'm gm stage 2, ottp 3" intake, gmpp exhuast, step colder spark plugs gap .040 i think. I brought it to the dealership for a engine knock and they said that my oil filter was crushed. ok what one isnt crushed alittle after 3000 miles, they said my oil pressure was to low therefore not opening my valves all the way. (sounded strange to me.) well i keep throwing this code, and dont know why. Any one have a clue to possibly why?

vacuum leak

where would u recommend to start looking for that? I think if that was the fact wouldn't my idle be rough and throw another code?

you have an intake, 90% of cobalt owners with an intake throw the p0171 code.

this happend to me i think its becuase of the tune maybe?

Bet it's because of the intake.

If your actual AFR's are normal I wouldn't worry too much about it.

My old car was a code throwing maching. I would just check the DTC with the interceptor or HPT, then clear them. Some I even just shut off.

I wouldn't worry too much about it.

[QUOTE=Hockeyman;4744748]you have an intake, 90% of cobalt owners with an intake throw the p0171 code.[/QUOT


my balt has thrown code twice in 2 years, i just clear and wait for it to come back to do it again lol

with a intake you throw a running rich code. That was the only code i was throwing before. The spark plugs are white therefore i am really running lean, and that would make my AFR wong. I'm 90% sure its not from the intake, this is the first code i've throw sence i got the intake 8 months ago. Im beganning to think its the step coder spark plugs or they're gap wrong