i just got my car back from the body shop, and installed my pcm...everything worked fine for two days, then last night, i was racing my buddy's 02 gtp (3"d/p,cai,3.4 mps,104's,18o tstat,custom tune) and i wqas smokin him...im almost stock right now, except for the pcm...anyway, the check engine light came on, so we scanned it and came back as "running too lean, (bank 1)" i dont remember what exactly the number of the code was...

any ideas? i had the pcm on for three days before the accident and didnt have any problems, but i re-installed the stock unit for when it was in the shop, so i know it wasnt something they did....

PLEASE help me out, because im mighty angry right now and want to know how to fix this...

$10 says it has nothing to do with the PCM. If it wasn't doing it before, why would it start now?

my guess is probably your O2 sensor is crapping out.

My $.02: Vacuum leak.

That's a good possibility as well...

why would the code not be there before installing the zzp pcm, and not come on with the new one? what should i try? i LOVE my pcm, and dont really want to send it back for retuning, so i would like to try and fix it...

the O2 sensors list for around 80 bux each, and i dont really have the cash to blow on them only to find out they did nothing...is there any way to test and see?

and how would i know if it was a vaccuum leak and find it?

I would have to concur on the 02 sensor I do'ntt think it'sw an issue with the pcm,a code would help to diagnose your problem.Chico(Pops)

what can i do about the sensor...how do i tell if its gone bad, and wouldnt the stock pcm pick this up as well?

two things... did you have the battery disconnected for more then 30 min before you installed or after you installed the new PCM?

the reason i ask is cause you need to let the fuel trims reset and adjust to the new pcm.

also did you do this the first time you had the pcm installed?

how long did you have pcm in the car before you raced your friend? was it two days like you say? how much did you drive the car before you raced him?

Second:
i have a copy of ZZP's GTP pcm file in front of me. they cut fuel enrichment by about half! making WOT much leaner then stock. on my friends car this caused serious KR issues. as of right now i had to pretty much redo most of what ZZP did in his PCM. Im not saying their PCM's are bad, but it shows not every car will have the same results with the same mods. (also can explain why you could beat your friend with all his mods!)


the things in a bin (besides reduction of KR and timing) that give the most increase in Acceleration are: Trany Shift points and adjusting Torque managment.

would think it had alittle something to do with u racing, system was just too lean for the demand! would not really worry about it.
If u have a scan too monitor it for abit, maybe the O2 is going

i used my scanner and it came up p0171 i think, system too lean (bank 1) and i checked the status of all the system monitors and the only one that would pass was the 02 sensor...BUT, if my sensor was bad, wouldnt the stock pcm pick it up also?
thanks for all the help so far!!!

every mod i do is turning around to bite me in the butt...im about to turn the car back to stock....GRRRRRRR!!!!!

welcome to the world of modding... costs you your car's reliability, if you can't deal with the consequences, don't do it. Yes it sucks but just like they said in the other thread about premium gas, you gotta pay to play.

That's why I have two vehicles. One is decent on gas and reliable, while my GP can hog gas and be a play thing.

yea, i love the gtp...and i loved the modding...but so far, nothing is working out for me...should i try replacing the sensors? its gonna cost about 170 bucks, or should i send the pcm in and get it re-tuned?