1995 Pontiac Firebird idles extremely high on startup

1995 PONTIAC FIREBIRD
135,000 MILES • 6 CYL • 2WD • AUTOMATIC
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BURROMOUSE
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I replaced my head gaskets on my 95 firebird 3.4l. Now when i start the car up it jumps up to 4000 rpms. i made sure all the electrical connections were correct and i played with the tps,iac and the o2 sensors and nothing changed. there isnt many vacuum lines on the car and ive checked those too. i was wondering if on this model there is a groud strap located on the cylinder head towards the rear of the motor or if anyone knows why this is happening? thanks
Jan 28, 2010 at 1:02 PM
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ERNEST CLARK
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Is your engine actually idling this high at idle, or is the tach telling you it's idling that high when it really isn't???

Something may be amiss with your camshaft/crankshaft position sensor. Use a DVOM to probe the connectors and check the sensors to spec. If that's not the problem, write back and I'll help you from there.
Feb 23, 2010 at 12:22 PM