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high rpm idle does anyone know how to fix

3K views 5 replies 4 participants last post by  nismo200sx16 
#1 ·
i have an sr20det red top and the car started rpming at 2000 when its at idle. hot and cold engine. does someone know how to solve this problem. thanks.
 
#5 ·
rogoman said:
If there's a bad fuel injector, it'll most like cause the idle speed to decrease and be rough.
also check vacuum lines for leaks and or unhookedness(yes i made that up) generally a vacuum leak will cause an engine to idle higher because its getting more fuel dumped in than air causing a rich condition
 
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