ok i posted about this before, but started a new post because the other one had the wrong topic.

i had the flutter in my rpms ...most of you figured vaccuum leak....i found a few hoses that were really old and dried out/cracked looking, and i finally replaced them. well i thought that was it, until i took a good drive....and what do you know....the idle did its little thing....the other vaccuum hoses looked ok.. i know i have that little vaccuum leak in the ac/heater controls-could that be it? or is there any where else it can come from??(seems i have heard about it leaking from bad plenum seal??) also, will it hurt to drive like this?

 

nothing??? how about IAC??? that came up in a similar post

 

If you have a "flutter" in your idle speed (like the 2.8 V6 in my Camaro does), its a high-mileage engine, and assuming that you don't have any major vacuum problems, then it's possible (acutally, inevitable) that your timing chain has become stretched.

 

RE: the IAC valve... that probably wouldn't wouldn't cause a flutter, although it could cause an idle speed that's consistiently too high or too low (and possibly lead to a stalled engine). If you've never done it before, though, it wouldn't hurt to unscrew the IAC valve and clean the pintle, as well as the area around where it sits. It gets corroded over time.

 

thanks sancho