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Car idles too high.Replaced ISC and new BISS.Now what?

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95EclipseGST

20+ Year Contributor
406
1
Mar 1, 2002
Kansas City, Missouri
Its not the throttle plate either cause i checked that. I DO have an exhaust leak.Could this cause that? My BISS is all the way in and the idle wont go lower than 2,000rpm unless i turn the ac on..then it goes down a little but not the way its supposed to.My other question is ,can a bent valve cause this problem also? Thanks
 
do you have a aftermarket bov?Your idle will be hight if the valve is set to stiff so it stays closed on idle.

alos if you vent to the atmosphere and you have plugged the return tube it will affect idle (in my experience)


also i have heard people with bigger injectors had problems with high idles.



thats the best i can do for you.

please correct me if i am wrong
 
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