Any chance dirt dropped down on the valves when you had the manifold off or when cleaning. Replacing the spark plug or coil packs is the most common fix for p0304 in the chevy tahoe Typically this is the fault of the canister vent valve that is under the rear of the truck, somewhat above the differential
Chevy Tahoe P0300 OBDII Code Diagnosis | Drivetrain Resource
While tests can be done on it and the circuit, it's an inexpensive part.
Move the coil, wire and spark plug from a separate cylinder, preferably on the other side of the motor away from 4and see if the issue changes
If it doesn't change, then it's probably not ignition. I'm experiencing a random misfire in a 2004 vehicle with a 5.3 engine I've replaced the spark plugs, swapped the coils and injectors, replaced the intake gasket, and performed a compression. We have a generic misfire code (i think p0380) that we have done everything to clear
Consider testing the crankshaft and camshaft position sensors, as faulty signals can cause random misfires Also, examine the fuel pressure regulator and fuel pump to ensure consistent fuel delivery. Ok guys, im new to the site and have been having major issues with my tahoe Its a 2004 4wd 5.3 non flex fuel
Hard to explain exactly what its doing but.
When your car’s onboard computer spits out a p0016 code, it means the crankshaft position sensor and intake camshaft position sensor are out of. That's right, the misfire could be caused by a bad cop coil (the usual culprit), or a bad fuel injector, or low compression in one or several cylinders How misfiring is diagnosed the cause of misfire of one of the cylinders should be fairly easy to pinpoint if the problem is present at the time of checking. Random, multiple engine misfire detected because of a damaged spark plug/spark plug wire, faulty ignition coil, or vacuum leak.
Hello all, my daughter's 2004 tahoe, 4.8l, 178k miles, was idling and running very rough and stalling often She was told that she needed to replace the coils, plugs & wires which she did, but it. I have bought a 2004 chevy tahoe and it has missfire I have changed all spark plugs, spark plug wires, o2 sensors, and knock sensors with their wire
I also cleaned the maf sensor, throttle,.
I have a 2004 vehicle with a 5.3 engine that is showing a p0300 random misfire on cylinders 1 and 8 I’ve replaced all the spark plugs, performed a compression test which came back good, and. So i installed new intake gaskets Im still getting a lean bank 1 code and a random misfire code
Tracked it down to cylinder 7 I swapped out 3 different coils and not one of them had fire at all.
