Questions & Answers for: Buick Rendezvous p0303

...p303 whats wrong and how do i fix it the thermostat was just changed and the light will not go out P0303 is a misfire on number 3 cylinder. A thermostat is going to fix a P0303. Check spark plug, ...

have a2003 buick rendezvous 3400 p0303 changed plugs, wires , coilpack ,then i got it did compression check 140psi figured mechanicly good figured injector replaced that and still same misfire. was ...

code p0303 taping code po303 refers to cylinder misfire no 3 cylinder.===causes engine mechanical fault--wiring--ignition /fuel systems --injector--ECT/MAF sensor--ECM if it has a tapping noise I ...

p0303 misfire misfire an shakeing an I put new plug an wire an same misfire unplug the #3 plug wire from the coil, have someone crank or start so you can check for proper spark from #3 coil tower (a ...