SCCAGT

If you had a misfire, the code for it would be p030x. x being 1-8, depending on the cylinder. Bad coil, plug, or injector can make that happen.
Since both sides are way off on fuel trim numbers, I'd start by listening and looking for a vaccuum leak. Since both sides are high, that is a likely cause.
There can be other things, but start with the basics before going over the edge and guessing with new parts.

moosestang

Yeah, both long term fuel trims are high at idle compared to what they used to be. My vacuum gauge looks normal though, but they maybe because the computer is able to compensate by adding fuel. It idles pretty good.

I tried cleaning the MAF, but it didn't change anything. Tomorrow I'll search for an intake leak. I might drive it to work tomorrow, so I can watch the fuel trims at different throttle positions. Plus my other ride is in my sig and it's supposed to be 27 degrees in the morning!

moosestang

Is Bank 2 the drivers side? Also has anyone used gasket maker for the blower to intake seal? If I have to pull the blower, I'll have to replace the gasket and obviously I don't have one.

hammeron

yes........

moosestang

Thanks.


I might look for some universal gasket sheets to replace the blower gasket, assuming it's an intake leak. I can just cut my own.

http://www.summitracing.com/parts/MRG-77B/?rtype=10

hammeron

i don't think you'll be pulling the s/c
off...

i only used gasket maker on the underside of
the manifold gasket, just in case i had to pull
the compressor off (which i did as it turns out).

i'm curious what is causing your issue.....

moosestang

I might have to if it's indeed an intake leak.

Drove it to work this morning, watching the LTFT the whole way. B1 rises at idle, but seems pretty normal while cruising. B2 is 10 points higher than B1 at all times, sometimes higher and of course at idle they are both high with b2 being 5 points higher.

My plans are to spray propane or break cleaner all around the supper charger gasket on the drivers side and the intake manifold gasket, while my wife watches the fuel trims and rpms. If that doesn't produce any results, then i'm going to swap the 02 sensors from one side to the other.

Since both B1 and B2 are high at idle, it would make sense there's a vacuum leak on the drivers side somewhere.

I goosed it on the way home to see if it was making boost and it does. It even smoothes out some under boost. I'll post this afternoon with an update.

hammeron

i like the plan and if she is monitoring
STFT's, it'll be real time feedback.

moosestang

I could get the short term fuel trims to go in the negatives by spraying brake cleaner in the intake, but I couldn't find a vacuum leak anywhere using this method. The STFT's are pretty close to each other and hover right around zero. Shouldn't bank 2 be high on the short term and the long term?

Wish I had a smoke machine to pump smoke into the intake.

hammeron

well it seems that the trim issue
is only happening during engine
load for some reason.

i don't know if pulling the battery
lead will clear trims, but might be
something to try.