2000 buick lasber 3800 P0300

Question

i have a 2000 buick lasber it has a po300 and i have replaced the intake gaskets the coil packs and the module that they sit on looked for vacume leaks everything checks out what else should i look for im stuck i dont know where else to go

Answer 1

take a good look at the plugs ..if u cracked one on installation it will still misfire. check your harness going into the ignition module for signs of breaks oil contamination on wires all these things will send intermittent signals and cause. coils to miss fire too..