Cornelius
TYF Newbie
Long time lurker, seldom poster here.
2003 Yukon, 5.3l, 4wd, 215k
A few months ago it popped a p0300
It runs fine, pleanty of power, good throttle response, no other codes except for the p0300
I'm starting to run out of inexpensive parts to throw at it, and so far what I've done is what is expected for either maintenance or age/mileage:
Plugs and wires
PCV valve
Intake manifiold gaskets
Rear O2 sensors (no voltage detected but no codes either)
Checked vacuum lines, good
I could certainly keep going with parts, like MAF sensor, knock sensors, cats, FPR, Injectors, etc but I'm not getting ANY OTHER CODES!
Any guidance on where to start from here would be appreciated. I hope to find an app that will give misfire counts for each cylinder, then I can start swapping around coils.
Will knock sensors (or anything else) cause a p0300 without lighting a CEL with it's own code?
2003 Yukon, 5.3l, 4wd, 215k
A few months ago it popped a p0300
It runs fine, pleanty of power, good throttle response, no other codes except for the p0300
I'm starting to run out of inexpensive parts to throw at it, and so far what I've done is what is expected for either maintenance or age/mileage:
Plugs and wires
PCV valve
Intake manifiold gaskets
Rear O2 sensors (no voltage detected but no codes either)
Checked vacuum lines, good
I could certainly keep going with parts, like MAF sensor, knock sensors, cats, FPR, Injectors, etc but I'm not getting ANY OTHER CODES!
Any guidance on where to start from here would be appreciated. I hope to find an app that will give misfire counts for each cylinder, then I can start swapping around coils.
Will knock sensors (or anything else) cause a p0300 without lighting a CEL with it's own code?