25thhawk

iTrader: (2)

My truck is misfiring in cyl #4. It randomly fires maybe 50% of the time better at half throttle, extremely bad at 1/4 throttle. Only on cyl #4. It has been doing it for a while so I replaced all plugs and wires. Didn't help, so I replaced the #4 coil, this didn't help either. Any thoughts? It is a 2000 5.3 silverado. Thanks

Ryan

GREGGO

iTrader: (2)

Burning oil? How did the plug look when you took it out compared to the rest? What other mods do you have? Ever run nitrous?

Okie02

#4 injector could be clogged up?

25thhawk

iTrader: (2)

no stock work truck, about 60000 miles, no mods, plug was wet and black, it definitely wasn't firing

My problem is definitely not with the injector plug or wire

I have tried multiple wires and coils, I definitely have a wiring or computer problem. But nothing has ever been apart and is all stock.

Thanks

25thhawk

iTrader: (2)

Definitely getting gas. Thanks

Texas Terminator

injector stuck open? might try swapping it to another cylinder and see if it follows. driver for that cylinders injector/coil failing? does it do it when it warms up or no particular time?

25thhawk

iTrader: (2)

Does it all the time.

Would a stuck injector cause a coil not to fire? I mean I used a timing light on the wire and there is not spark about 50% of the time.

Thanks