Guest GrandPrixlover1 Posted February 6, 2008 Report Share Posted February 6, 2008 Hello everyone, I have just a small problem. My car idles rough more than it used to and I need some opinions. well when my car first idled rough, it was the pcv valve, and I got that replaced, with a new and better one. Problem is it wasn't fitting on there right to where the lip of the rubber connector that fits to the valve was angled away from the valve letting outside air in. Well I went to autozone and bought a hose clamp and put it on and bam problem fixed. Well later on the next day I start her up cold and she's idling rough again. I haven't checked the plugs yet since I've seafoamed the car so I know that can be one possibility, but I was also wondering if there were any others. when I shut the engine off there is a hissing noise from under the hood after the car had been driven a distance (i.e.-20 miles, which is from my dorm to my house). I don't know if this is another vacuum leak, or possible gasket leaking. I'm not losing any antifreeze so I don't know what to think. I'm thinking maybe another possible vacuum leak somewhere else or bad plugs, problem is I don't know really where all to look. Thanks. Quote Link to comment Share on other sites More sharing options...
ns87 Posted February 7, 2008 Report Share Posted February 7, 2008 The hissing noise is normal. I think it has to do with the vacuum canister near the front fender. Do you have the 3.4 or the 3.1? I'm not familiar with the 3.4, but 3.1 vacuum lines are very easy to replace. http://www.w-body.com/forum/index.php?topic=61171.msg726378#msg726378 Quote Link to comment Share on other sites More sharing options...
Guest GrandPrixlover1 Posted February 7, 2008 Report Share Posted February 7, 2008 The hissing noise is normal. I think it has to do with the vacuum canister near the front fender. Do you have the 3.4 or the 3.1? I'm not familiar with the 3.4, but 3.1 vacuum lines are very easy to replace. http://www.w-body.com/forum/index.php?topic=61171.msg726378#msg726378 I have the 3100 SFI V6 engine. Quote Link to comment Share on other sites More sharing options...
per0781 Posted February 7, 2008 Report Share Posted February 7, 2008 i'd check for a vacuum leak. also, clean the MAF, throttle body, and IAC. Quote Link to comment Share on other sites More sharing options...
Guest GrandPrixlover1 Posted February 7, 2008 Report Share Posted February 7, 2008 How do I clean the MAF? I know how to clean the throttle body, and this may be a noob question but, what is an IAC? Quote Link to comment Share on other sites More sharing options...
ns87 Posted February 7, 2008 Report Share Posted February 7, 2008 IAC is idle air control. Sorry, I'm not familiar with the 3100. Only the 3.1MPFI Quote Link to comment Share on other sites More sharing options...
SigEpCutlass Posted February 7, 2008 Report Share Posted February 7, 2008 What year is your car? If it's a 94 or 95 & the vac lines are ok, then you may need to do an idle relearn. IIRC, there's a FAQ posted in the FAQ forum with the procedure. Quote Link to comment Share on other sites More sharing options...
Guest GrandPrixlover1 Posted February 8, 2008 Report Share Posted February 8, 2008 I have a 96 GP SE Coupe, thanks I'll check that out. 8-) Quote Link to comment Share on other sites More sharing options...
19Cutlass94 Posted February 8, 2008 Report Share Posted February 8, 2008 pull the plugs and check them as well. They are cheap enough you just might want to replace them if they dont look good. Quote Link to comment Share on other sites More sharing options...
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