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Old 11-07-2017, 04:24 PM   #1
saturnsctwo
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saturnsctwo is a jewel in the roughsaturnsctwo is a jewel in the roughsaturnsctwo is a jewel in the rough
 
Join Date: Jun 2004
Location: Cleveland, OH
Posts: 5,335

2001 SC2
Default rough idle

on my 2001 sc2 I get a slightly rough idle & when coming to a stop it feels like the engine might stall as the tach drops, but it never does. the tach sometimes drops slightly below normal idle speed then comes up. this only happens while the engine is warming up. at operating temp it goes away completely. the only things I did to the engine in recent years is new plugs, wires, & a new cam cover gasket & new air filter. any ideas what to check?

no codes or check engine light displayed at this time. the engine runs fine otherwise though, no stumbling & lots of power throughout all of this & no other issues whatsoever.

oh I almost forgot a new stat last year & I replaced the valve/diverter by the a.i.r. pump last year also which solved the problem with the emission control. I had the code coming up. I forgot what it was but most know it by heart.....

Last edited by saturnsctwo; 11-07-2017 at 04:34 PM..

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Old 11-07-2017, 05:35 PM   #2
saturnsctwo
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saturnsctwo is a jewel in the roughsaturnsctwo is a jewel in the roughsaturnsctwo is a jewel in the rough
 
Join Date: Jun 2004
Location: Cleveland, OH
Posts: 5,335

2001 SC2
Default Re: rough idle

my egr valve has never been cleaned. a possible culprit?

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