Expert: Kevin - 10/25/2009

Question
QUESTION: please i have a wj2001 with a 4.7lt i keep geting the same code p0353 brand new coil #3 brand new spark plugs at a lower rpm the idle is rough, I DONT KNOW WHAT TO DO NEXT, PLEASE HELP

         THANKYOU

ANSWER: did u over heat the engine?

---------- FOLLOW-UP ----------

QUESTION: i dont know if you got my 2nd message but how ever own before me , for sure they overheated bucase i end up doing new head gasket but before that it was runing fine with the exception the it was leaking antefreze in to the engine

Answer
P0353-IGNITION COIL #3 PRIMARY CIRCUIT
When Monitored: With battery voltage greater than 8 volts during engine cranking or
greater than 12 volts with engine running, engine rpm less than 2016, and none of the coils
in dwell when checked.
Set Condition: Peak current is not achieved with battery based dwell plus 1.5 msec of
diagnostic offset. It takes less than 3 seconds during cranking or up to 6 seconds while
running to set.

Turn the ignition off.
Disconnect the coil on plug no. 3 harness connector.
Disconnect the PCM harness connector(s).
Measure the resistance of the coil driver no. 3 circuit from the coil on plug no. 3
harness connector to the PCM harness connector.
Is the resistance below 5.0 ohms?


Turn the ignition off.
Disconnect the coil on plug no. 3 harness connector.
Note: The following resistance measurement should be taken at 70-80
degrees F.
Measure the primary resistance of the coil on plug.
Is the resistance between 0.6 and 0.9 ohms