Idles right cold but throws a check engine light warm and surges at idle warm???

[blacksambo]

Hi Group,
My wife's black 54K '99 starts the day out right, but she comes home with the light on, and the idle surges up and down when restarted warm after a 25 mile run home. (I just disconnect the battery and the light goes out.) Any suggestions greatly appreciated. Thank you all.

[AndyC]

Humm not sure if it could be the same problem I had this weekend. I just checked mine and I had trouble codes 171 & 174 stored. I reset them with my Scan gauge II and looked around. I had a vacuum leak coming from the left side of the common chamber - Intake manifold. Turns out I have a leak in the lower gasket Well I just used some gasket sealant on it and I'll check tomorrow to see if it sealed tight.

[circmand]

Have Napa autozone or other place read the code you do not have enough inof for us to help you

[WormGod]

I am betting it's a 171. Like I said in another thread, this is an epidemic going around. I call it the "171/174 VX Flu".

Do get the code run and see what you get though. This exact symptom has been popping up quite a bit so it should be able to be remedied pretty fast.

[don moore]

i had that last week..it freeked me out..i thought oh no .....not me...
so i shut it down ..checked and cleaned the pvc..air cleaner gas cap.checked all the wires and hoses.checked the oil and other fluids.and added some heat to the tank..let it sit for a while then put some premium in it and now its all gone ...wierd.runs like a top now..

[circmand]

but got a P1441. I beleive I saw a post for an FTP fix but search just keeps bringing up FTP as a computer site. Anyone know where that post is?