I have a 2000 cavalier 2.4 firing order is 1342 but 1 and 3 is not working i put on new coil packs did not work
wife drove to work and when she started the car it was missing bad, 1and3 is not workig iput 2 new coil packs on and 1 and 3 still miss i also replaced plugs and boots and control modul
Did you do a compression test?
Mark could be right get a compression check because, I hate to say it but, blown head gasket. VERY, VERY common with this engine.
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