Your going to find that the P03OO can be a dozen different things or more. I've been fighting the same issue for weeks. My truck is not my daily driver so I'm not in a rush but will share some history.
My truck acts similar - between 3-4k rpm's CEL blinks and P0300 shows up - no other codes, just random misfire. Seems to idle fine until you hit 3-4k rpm's and once the misfire is there - the truck idles ruff.
I've replaced plugs - wires, entire distribution cap and all associated parts within the distributor (youtube PO300 and you will find lots of good info surrounding P0300 and your distributor)
MAF replaced too.
Local shop has tested fuel delivery - even compression at each cylinder - local shop was stumped and didn't charge me anything.
Went to dealership - what a waste of time! Dealership is trying to tell me its my cats that are bad and that could be true but there are no codes associated with cats going bad or rotten egg smell. I intend to rid my truck of the cats completely near future but I'm still chasing the P0300 ghost.
Truck has 129k miles on it and I barely drive it. I'm thinking its fuel related - bad injector, clogged fuel rail, etc.
My next project is to replace the fuel filter myself and take a really close look at the fuel filter. Truck is babied and hardly ever driver.
My truck acts similar - between 3-4k rpm's CEL blinks and P0300 shows up - no other codes, just random misfire. Seems to idle fine until you hit 3-4k rpm's and once the misfire is there - the truck idles ruff.
I've replaced plugs - wires, entire distribution cap and all associated parts within the distributor (youtube PO300 and you will find lots of good info surrounding P0300 and your distributor)
MAF replaced too.
Local shop has tested fuel delivery - even compression at each cylinder - local shop was stumped and didn't charge me anything.
Went to dealership - what a waste of time! Dealership is trying to tell me its my cats that are bad and that could be true but there are no codes associated with cats going bad or rotten egg smell. I intend to rid my truck of the cats completely near future but I'm still chasing the P0300 ghost.
Truck has 129k miles on it and I barely drive it. I'm thinking its fuel related - bad injector, clogged fuel rail, etc.
My next project is to replace the fuel filter myself and take a really close look at the fuel filter. Truck is babied and hardly ever driver.
