91 pontiac sunbird 2.0L

[billplane]

Engine starts/runs ok when cold but hesitates after warm up

 

[melsg5]

how long since basic maintenance, fuel filter, air filter, spark plugs?

 

[billplane]

All routine mtx. done: cap&rotor,wires,plugs plus new egr valve which helped but didnt cure..makes it difficult when leaving stop signs etc.

 

[92 Sunbird LE]

Could be alot of things...............( coolant temp sensor, idle air control valve , pvc , air inlet sensor , map sensor , dirty injectors, vacumn leak ,etc )

No Check Engine Light?

Doug in P.R.

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[92 Sunbird LE]

Have you sprayed out your Throttle Body with cleaner? Try Seafoam or fuel injection cleaner in the tank , it may help also.

Doug in P.R.

 

[billplane]

Thanks for the suggestions..I believe that you hit on a likely with the Idle air control for it doesnt ohm out correctly.

 

[billplane]

Ps...yes on the check engine light ;-)

 

[92 Sunbird LE]

What code number(s) is it throwing ?

http://www.troublecodes.net/gm/

Doug in P.R.

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