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Hey, the idle in my 91 se-r has recently started to bounce upon startup. After initial startup, it drops almost to 100 rpm then up to 1500 then back and slightly decreases until it stops at around 1100, until it gets warm. The idle stays normal once the engine has warmed up. I have not as yet been able to determine what might be causing this. Any possibilities would help.
 

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trev9111 said:
Hey, the idle in my 91 se-r has recently started to bounce upon startup. After initial startup, it drops almost to 100 rpm then up to 1500 then back and slightly decreases until it stops at around 1100, until it gets warm. The idle stays normal once the engine has warmed up. I have not as yet been able to determine what might be causing this. Any possibilities would help.
Could be a few things. I would start with your throttle position sensor, then to your PCV, then to you EGR.
 
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