drop on idle?

[eatmyrice]

When im sittin at a stop light, sometimes my rpms drop down to about 500. The car has a lil shake when this happens, almost kinda like the car stalls. Does this happen to anyone else?

 

[scott42]

I had this happen a couple times a few weeks ago, but it has gone away since then. engine wasn't cold, nor was it cold out...not real sure what it could be.

 

[kep0ne]

i had this problem in a chevy blazer i used to own...turns out one of the plugs was misfiring...take it to the dealer...its a warranty problem

 

[<Inimical01_ES>]

[Forgot my PW]

This was happening to me after I installed my intake and cat-back. So I put in a few tanks of 93 octane gas, and haven't had the problem since.


Couldn't hurt to give it a try.

 

[scott42]

I only run 93 though. We don't have any 91 around me. any ideas?

 

[mp3girly]

It does it to me, too! I hate it.. I have no idea what's wrong. I run 93 as well.

 

[20ESGUY]

the problem you all are describing happens to me too. it's actually normal believe it or not. that slight little drop for a few seconds, sometimes longer, is the pcm searching for whats known as 'target idle'.
it has to do it every now and then as a self check. it won't hurt any thing it's just kinda annoying especially if you have any audio upgrades.

 

[scott42]

Thanks. Always nice to get some good news.
As long as its normal. Thanks 20ESGUY!