sluggish throttle

threebyfour

Registered User
My 91 5 spd car seems to have a very sluggish throttle response compared to my 90 auto, I stab the pedal in neutral and the tach jumps up fairly quick but seems to drop in rpms quite slowly, I dont notice any power loss, its still boosting normal and running fine, just not as "crisp" as the auto car. Any ideas? a guy at work was talking about the idle air bypass valve, ring any bells?
 
The IAC would not cause the issue you are describing. Roaming idle maybe but not an acceleration issue. How about an EGR issue. I believe the manual cars have EGR valves. A stuck open EGR will cause poor acceleration and poor throttle response. However without more information it could be something totally different.
 
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