NEED HELP! Codes:P0171, P0174, P0304, Symptoms inside

[taylorRichie]

Thanks for the advice...

I did follow the instructions on replacing the IAC per the CD Manual... Measured and set the length of the pintle. No need for the fuse removal because I had the Battery disconnected.

I'm leaning toward MAF or EGR... We'll see what the dealer says... When I get around to taking it in shrug.

[WormGod]

I'm leaning toward MAF or EGR... We'll see what the dealer says... When I get around to taking it in shrug.

I am leaning towards either or both. Come tax time, I am replacing both of mine and throwing in a new FPR to boot.

I reset my codes this weekend and took it out. I never got the over-rev, which I usually do. I noticed both Sat and Sun, the CELs would not throw until I was at highway speed and let off of the gas. Very curious but it at least leads me down the road to fuel/air operations.

[etlsport]

Thanks for the advice...

I did follow the instructions on replacing the IAC per the CD Manual... Measured and set the length of the pintle. No need for the fuse removal because I had the Battery disconnected.

I'm leaning toward MAF or EGR... We'll see what the dealer says... When I get around to taking it in shrug.

have you tried checking your air-fuel ratio? you should be able to program the scangauge to show it.. mine always reads 14.3 (or is it 14.7... i cant remember)

[taylorRichie]

I haven't tried programming the Air Fuel.. Not even sure how...

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@Worm

I looked at replacing the the FPR, but couldn't figure out how to get that relay that's on top of it off. And the book said, remove relay.... Didn't really help me figure out how to remove it.

I think I'm dropping it off at the stealership tomorrow..

I'll have them diagnose and me repair.

[etlsport]

the fpr replacement was pretty easy.. im not sure what relay you are talking about... but the black box comes off with two bolts one on the side and one facing the firewall.. there is a fantastic write up on here somewhere, if you cant find it i think i have a pdf version of it on my computer... also try sending a pm to circmand.. i think last i heard he had the paper version of the write up and the modified allen wrench that makes things much easier

[Mrcln1]

I'm going to watch this thread closely cause I just started having the same problems yesterday.....uggg

[taylorRichie]

Thanks ETL... That black box is the relay...

I modified an allen to get to it... but it's still a pain to get to the screw facing the firewall...

I'm still going to be dropping my VX off at the dealership, just to be safe, and possibly save me some money (replacing things that don't need it ) I'll keep everyone posted.

[Mrcln1]

Any update??? I'm having the same issues and no luck???