jhncrwfrd2
Newbie
Two weeks ago I had my first issue with 1998 k2500 - 5.7. Owner before me replaced engine with one from Jasper, jt has 60k +/- on it.
I had the truck at WOT, felt a bit of a miss and CEL came on immediately. When ai got home, I popped the hood and started looking at the spark plug wires, etc.. I figured it would be a good time for a tune up anyway and that may fix my issue... it didn't.
Parts replaced :
Ignition module - AC delco
Coil - NGK
Cap and rotor - standard ignition
Spark plug wires - standard blue streak
Spark plugs - NGK platinum
Both front o2 sensors - Bosch (BB tune, rear o2's not active)
Fuel filter - K&N
Air filter - K&N
Changed oil - Castrol/ Baldwin filter
I also cleanes the MAF and TB, TB was filthy.
Truck has 3" exhaust true dual, to 2- single chamber mufflers, came with the air raid CAI and I put a new K&N filter on it. Has a BB tune.
Problem ha sprogressivly gotten worse. Its strange that my MPG has gotten better. The miss is much more noticeable and at times it stalls and will not get above 3,000rpm. I can't hold the gas pedal to the floor and eventually it starts making power. Acts likes its flooded and then clears it out. I'm suspecting that the spider is my issue. Maybe the day of the first miss it had was an injector/poppet or the regulator going out. I plan on pulling thr upper plenum and have and mpi ordered. Does that make sense? I wasn't completely sure it needed all the tune up parts when I did it, but I figured it was about time anyway. I would like to the get this fixed, though. My Longft are negative 3-5 on both banks. MAF and MAP seem to be reading correctly.
On the scanner the RPM will intermittently jump to 12,800 when idling. No change in actual rpm just on the scanner, which is a low end code reader type. The only code it has thrown this whole time was the p0300, I don't believe it will do specific cylinders.
Any advice would be appreciated.
I had the truck at WOT, felt a bit of a miss and CEL came on immediately. When ai got home, I popped the hood and started looking at the spark plug wires, etc.. I figured it would be a good time for a tune up anyway and that may fix my issue... it didn't.
Parts replaced :
Ignition module - AC delco
Coil - NGK
Cap and rotor - standard ignition
Spark plug wires - standard blue streak
Spark plugs - NGK platinum
Both front o2 sensors - Bosch (BB tune, rear o2's not active)
Fuel filter - K&N
Air filter - K&N
Changed oil - Castrol/ Baldwin filter
I also cleanes the MAF and TB, TB was filthy.
Truck has 3" exhaust true dual, to 2- single chamber mufflers, came with the air raid CAI and I put a new K&N filter on it. Has a BB tune.
Problem ha sprogressivly gotten worse. Its strange that my MPG has gotten better. The miss is much more noticeable and at times it stalls and will not get above 3,000rpm. I can't hold the gas pedal to the floor and eventually it starts making power. Acts likes its flooded and then clears it out. I'm suspecting that the spider is my issue. Maybe the day of the first miss it had was an injector/poppet or the regulator going out. I plan on pulling thr upper plenum and have and mpi ordered. Does that make sense? I wasn't completely sure it needed all the tune up parts when I did it, but I figured it was about time anyway. I would like to the get this fixed, though. My Longft are negative 3-5 on both banks. MAF and MAP seem to be reading correctly.
On the scanner the RPM will intermittently jump to 12,800 when idling. No change in actual rpm just on the scanner, which is a low end code reader type. The only code it has thrown this whole time was the p0300, I don't believe it will do specific cylinders.
Any advice would be appreciated.