No known overheating issues
I have only owned this Jeep for 9 months, have only driven it 6k miles since
2 days ago parked it, started it 3hrs later to a really rough idle. Even under load you could feel the misfire. Drove for 10 mins cylinder fire returend to normal, once normal operating temp was reached. It has been this way for the last 72hrs.
Rough idle, feel the misfire until at operating temp... Then runs normal.
on day 2 it threw a code, cylinder 5 misfire P0305
Searching all over the forums everyone goes through the normal checks... Plugs, coil pack, injectors, compression.
I have done none so far, because i still cannot figure out why it misfires until it reaches temp... then STOPS and runs normal.
Any of the traditional culprits listed abouve would be present no matter the temp or duration of use. A faulty coil pack will misfire from ignition on to ignition off... and like wise for the other components.
Is the PCM shutting down that cylinder to correct the timing/spark/fire?
Does the issue correct itself with heat... i.e. explanding valve seat/seal, vaccume hose leak, et all.
Any thoughts or input would be accepted.
I already understand the spark/coil/injecotr troubleshooting tips and plan to try those this weekend, i aldready expect the issue to persist.
I am more concerned with why it stops at temp and possible valve/head issues.
99 XJ – SOLD
00 WJ – Rust Bucket SOLD
01 WJ – 4.7, 247, Zone 4” Lift