Guys-
Synopsis:
03 DII (meticulously maintained and set up for overlanding), 170k, HG done at 68k (due for another), used like a Rover should be used (trips with varying degrees of difficulty to BC, WA, OR, CA UT, AZ, NM, CO), oil changed every 3500mi, parts replaced as needed at first sign of failure, added CDL and other goodies. Plugs/wires (NGK/STi) changed approximately 40k ago.
Symptoms:
P0300, P0306 started appearing on our way home from Utah last week. Luckily we were close to home, <50 miles.
Attempted remedies:
Cleaned MAF (original MAF)
Verified wires are not the culprit (swapped 4 and 6 leads as well as used an inline tester)
#6 plug looks fine when pulled (could swap plug from #4 with #6)
Again, MAF is original as well as coil-packs. Pretty much everything else has been replaced including all ancillaries as well as new water pump, low-temp thermostat, new radiator and all new hoses. This truck has been taken care of. CKS has not been replaced nor has TPS.
My take might be coil pack or CKS. I could see how CKS could cause a misfire reading. Just not sure.
So what is the collective thought on what the likely top two culprits are?
Synopsis:
03 DII (meticulously maintained and set up for overlanding), 170k, HG done at 68k (due for another), used like a Rover should be used (trips with varying degrees of difficulty to BC, WA, OR, CA UT, AZ, NM, CO), oil changed every 3500mi, parts replaced as needed at first sign of failure, added CDL and other goodies. Plugs/wires (NGK/STi) changed approximately 40k ago.
Symptoms:
P0300, P0306 started appearing on our way home from Utah last week. Luckily we were close to home, <50 miles.
Attempted remedies:
Cleaned MAF (original MAF)
Verified wires are not the culprit (swapped 4 and 6 leads as well as used an inline tester)
#6 plug looks fine when pulled (could swap plug from #4 with #6)
Again, MAF is original as well as coil-packs. Pretty much everything else has been replaced including all ancillaries as well as new water pump, low-temp thermostat, new radiator and all new hoses. This truck has been taken care of. CKS has not been replaced nor has TPS.
My take might be coil pack or CKS. I could see how CKS could cause a misfire reading. Just not sure.
So what is the collective thought on what the likely top two culprits are?