RPM's drop intermitantly at idle

[BensBACobra]

I'm sure there are tons of you that have experienced this problem. its hard to take it to a shop b/c it just doesnt do often enough that its going to happen when the mechanic drives it (my luck). so what do you guys think is the problem?

 

[BensBACobra]

you bastards never reply to my posts!

 

[BensBACobra]

SCREW YOU ALL!!! YOU GUYS REPLY TO THE DUMBEST NEWBIE POSTS BUT WHEN A MEMBER HAS A LEGITAMATE PROBLEM, THERE ARE TONS OF VIEWS BUT NO REPLIES. ALL YOU GUYS DO IS POST PICS OF YOUR CARS AND TALK ABOUT HOW TO BEAT LS1'S. I AM SICK OF THIS FORUM!

 

[The Factor]

Heres one more view for you

 

[Uncle Meat]

SCREW YOU ALL!!! YOU GUYS REPLY TO THE DUMBEST NEWBIE POSTS BUT WHEN A MEMBER HAS A LEGITAMATE PROBLEM, THERE ARE TONS OF VIEWS BUT NO REPLIES. ALL YOU GUYS DO IS POST PICS OF YOUR CARS AND TALK ABOUT HOW TO BEAT LS1'S. I AM SICK OF THIS FORUM!

Did you ever think that maybe we don't have a clue as to what's causing your problem? Your description of the symptoms was pretty slim so there wasn't a lot for us to go on. Do you have an aftermarket TB installed by chance? Have you checked the TPS voltage?

U.M.

 

[TheCrazy1]

I have a 98 and it would do that sometimes. It was worst at operating temperature after I'd back up and stop. The engine would stall most of the time. It's gotten a lot better since I changed my coil packs and the mass air flow sensor. Every now and then the idle seems to dip a bit low for no apparent reason, but it fixed the stalling. I would suggest checking the TPS as Uncle Meat said as well. Are your spark plugs gapped properly?

 

[chuckstang95]

iac possibly? mine does this too now but i think it may be fuel related with me or my maf probably as i have a new iac valve already, who ever knows

 

[BensBACobra]

I have a 98 and it would do that sometimes. It was worst at operating temperature after I'd back up and stop. The engine would stall most of the time. It's gotten a lot better since I changed my coil packs and the mass air flow sensor. Every now and then the idle seems to dip a bit low for no apparent reason, but it fixed the stalling. I would suggest checking the TPS as Uncle Meat said as well. Are your spark plugs gapped properly?

that is EXACTLY what is happening, when i back up and stop is usually when it does it. it also does it when i am in traffic and engine temp gets hot enough to make the fan come on, then the idle will drop. mine has never stalled however.