Spark plugs, 1995 4.3l caprice classis

Have you checked the pickup coil?

needs a tune-up, spark plugs, wires , distributor cap & rotor, fuel filter, air filter, might need coil also, put some drygas in fuel tank, check all vacumn lines, change oil & filter. DO ALL THIS , IT NEEDS IT i'M SURE, THEN YOU'LL BE GOOD TO GOOOOOOO!!!!!!!!!!!!!!!

check the fuel pump pressure, a weak pump will cause this, if you hold gas pedal a little will it stay running ?

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if it was running fine before you changed the cap and rotor just make sure you put the spark plug wires back in the same spot you might have got them mixed up

easy to crack one, or not get a wire on all the way. have you replaced the wires also?? always good to recheck your work and never throw out the idea you could have got a bad plug

They are in the cylinder heads. Just follow your plug wires from the distributor cap and the other end goes to the spark plug.

Check your ignition control module (ICM)

YOUR MECHANICS DOESN'T DISCONECT THE SPARK TIMMING CONNECTOR BEFORE SET TIMMING. IT IS LOCATED JUST BELOW THE TPS SENSOR AND CAN BE OF ONE OR TWO CABLES

Have you check your heater core it might be junk