1989 firebird with a 350.
Runs rough when it runs for a few
minutes.changed all relays and intake manafold
gaskets and most sensors.what do i do now?
faulty IAC and replace the fuel filter as well..
Is the check engine or service engine soon light on? -Jim
check all your plug wires for the right firing order & if they are on good?
New spark plugs?
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