Thread: Help with Idle & Stall Problem..Plz!!

I have a 2001 Grand Prix GT-3.8 that i was having issue's with. Were the car was idling weird & wanted to stall at low rpms after flucuating up and dwn for a minute. And was getting a P0102, P0443 and 02 & 01 sensor codes. So people told me it was the MAF sensor..so i replaced it and the weird idling stop a bit. It only acts up when i 1st start the car in the morning after its been sitting overnite..and the idle flucuates up and dwn and gets to low rpms and wants to stall, so i press on the gas for a second and once i let off of it...it idles normal..and i can cut it off and back on and it idles fine..but when i had the old MAF sensor in it wouldnt idle normal at all..no matter if i pressed on the gas or not. When i hooked the new one up i made sure the positive wire was disconnected..so when i hooked it back up it would register it was a new piece & i also tried to reset the codes by unplugging the positive wire for 20mins and hooking it back..and it erased the codes..but the SES light came right back on. Does anybody have any other ideas of what it could be? Do i need to drive it so many miles for the computer to reprogram itself to the new piece? and could the bad MAF sensor cause all the other codes to pop up? Im lost...

First off..It's much safer and better to unhook the negative cable. Always unhook that one first and then the posistive if you need the positive undone.

Take a look in the code listing and please list out the names for the codes you posted. If you wanna take the next step hit up gearchatter.com and search on those codes. Link them up and we can help you with next steps.

Ok..its P0102 code: MAP or MAF sensor codition.
P0443 code: EVAP purge/vent solenoid circuit condition.
P0135 code: Heater condition(heated oxygen sensor bank 1 sensor 1)
P0141 code: Heater condition(heated oxygen sensor-bank 1 sensor 2)
These are the codes that came up when autozone read them...rite after i put the new MAF on. And these were the same codes that were popping up when the bad MAF was on, so im wondering if the computer has to reset itself or somin.

One O2 I could understand, but both is a little tough..hmm Check all your underhood and in cabin fuses. I'm kinda thinking the fuse for the heater circuit blew.

The Evap... sounds like the soleniod that's usually on the engine. But hang in a second and let others respond too,...that way I don't send you after the wrong thing.

OK..i called myself checking the fuses this morning, but none seemed to be blown to my knowledge which is not much on these cars. Where would the heater circuit fuse be located on a 01 Grand Prix GT? and what would it be labeled as?

Taht's the part I don't know.. Likely it's underhood and labeled something clear like "misc eng ctrl" lol

Clear as mud...lol

Lmao..i kno rite..dont know myself either. I also have subs and a amp hooked up..would that cause any of these problems if it was hooked up wrong? Cause everything was fine(no codes) or nothing until i got these damn subs hooked up..lol

you have a leak in your air intake. inspect your intake and reconnect or repair if needed this solved this same problem with my fiancee's Grand prix SE