Sorry if this has been covered countless times or pinned somewhere, but I'm at a loss with a current misfire problem...
I just bought a used 2000 lightning and it's missing on cylinder#4 and cylinder#6... I've already replaced all the spark plugs with new NGK's TR6's gapped at .42... The truck is stock all around (or to the best of my knowledge).
I've tried swapping the coil packs and injectors around between "good" cylinders and the missing cylinders, but there doesn't seem to be any difference. The misfire stays on the same two cylinders.
I've hooked up a Noid light on both the injector and plug harness, and they both are receiving a current (the injector flash is more dim, but I'm not sure if that matters?)
The resistance at the coil packs and injectors also seemed to be fine...
After driving around the car I did pull the plug again and it seemed a little white, but nothing crazy. The misfire does go away as I accelerate, but it still bogs down a little when shifting. (I'm not sure if this is the Computer performing safety measures)
Below are the current codes I'm receiving... I will be performing a leak down test once I get a new fitting adapter that Is deep enough to thread into the plug threads.
-p0356: ignition coil F Pri/SEC circuit fault
-p0234: turbo overboost condition
-p1746: pressure solenoid circuit open
-p1760: pressure control solenoid A short
-p1124: TP Sensor out of range
-p0300: random misfire detected
My thoughts were that the overboost condition is occuring because there's a misfire and the computer is trying to perform safety measures by turning off the injector, etc...? I also did not think a TP sensor out of range code would cause misfiring in 2 cylinders specifically. The pressure solenoid codes should be irrelevant and I also didn't think I'd get a p035X code if it was a compression issue.
Any suggestions would be greatly appreciated.
I just bought a used 2000 lightning and it's missing on cylinder#4 and cylinder#6... I've already replaced all the spark plugs with new NGK's TR6's gapped at .42... The truck is stock all around (or to the best of my knowledge).
I've tried swapping the coil packs and injectors around between "good" cylinders and the missing cylinders, but there doesn't seem to be any difference. The misfire stays on the same two cylinders.
I've hooked up a Noid light on both the injector and plug harness, and they both are receiving a current (the injector flash is more dim, but I'm not sure if that matters?)
The resistance at the coil packs and injectors also seemed to be fine...
After driving around the car I did pull the plug again and it seemed a little white, but nothing crazy. The misfire does go away as I accelerate, but it still bogs down a little when shifting. (I'm not sure if this is the Computer performing safety measures)
Below are the current codes I'm receiving... I will be performing a leak down test once I get a new fitting adapter that Is deep enough to thread into the plug threads.
-p0356: ignition coil F Pri/SEC circuit fault
-p0234: turbo overboost condition
-p1746: pressure solenoid circuit open
-p1760: pressure control solenoid A short
-p1124: TP Sensor out of range
-p0300: random misfire detected
My thoughts were that the overboost condition is occuring because there's a misfire and the computer is trying to perform safety measures by turning off the injector, etc...? I also did not think a TP sensor out of range code would cause misfiring in 2 cylinders specifically. The pressure solenoid codes should be irrelevant and I also didn't think I'd get a p035X code if it was a compression issue.
Any suggestions would be greatly appreciated.