After my first tune-up on my '99 WJ I experienced a miss and
shudder. My first guess was that one of the engine coils I
had taken out by force had suffered from the experience. After
consulting with the folks on the WJ list on yahoogroups I learned
of a technique that works for Chrysler products:
you turn the key on/off/on/off/on - then WATCH the odometer,
the codes will appear there.
quick time movie: http://www.wagoneers.com/WJ/tech/WJ-engine-codes/error-codes.mov
You can't see it clearly in the video, but the codes are, and mean:
P0305 = #5 IGNITION COIL
P1685 is an Invalid SKIM key. I disconnected part
of the aftermarket alarm system that was going to a
coil wire...
I reconnected the wire and was able to start the car.
I did get that key light with the wire disconnected.
dash test
- key off
- hold trip reset down
- key on
- watch the blinking lights and needles flail about
quick time movie: http://www.wagoneers.com/WJ/tech/WJ-engine-codes/dash-test.mov
coil swap
Error code points to #5 coil.
New coil on the right, old on the left, p/n on box:
($31.15 list price January 2002 - found it at a Dodge dealer!)
Looking into the area where the coil was removed:
Looking down into the spark plug hole:
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