Engine Miss
Thread Starter
Instructor
Joined: Sep 2003
Posts: 186
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From: Havre de Grace MD
Engine Miss
I am taking my 99 back to for the 3rd time to fix a sporadic engine miss. The codes are P0300 HC (engine misfire detected) and P0357 HC (Ignition Control #7 Circuit). The service dept says it is in the fuel injection system.
they have done the following that I know of:
1.1. Flush fuel injectors
1.2. Decarbonize the upper part of the engine
1.3. Changed fuel filter
Problem came back before I was a block away.
2.1 Switched #7 fuel injector with #3.
Problem came back as P0357 #7 again.
2.2 Changed the ignition coil.
Car ran 300 miles and then the engine misses and 20 miles later the check engine light comes back on.
SAME CODES.
HELP - DOES ANYONE HAVE ANY SUGGESTIONS? The dealer told me to take the car last week and we would settle up later. I may go broke.
Thanks for you ideas.
Jim
they have done the following that I know of:
1.1. Flush fuel injectors
1.2. Decarbonize the upper part of the engine
1.3. Changed fuel filter
Problem came back before I was a block away.
2.1 Switched #7 fuel injector with #3.
Problem came back as P0357 #7 again.
2.2 Changed the ignition coil.
Car ran 300 miles and then the engine misses and 20 miles later the check engine light comes back on.
SAME CODES.
HELP - DOES ANYONE HAVE ANY SUGGESTIONS? The dealer told me to take the car last week and we would settle up later. I may go broke.
Thanks for you ideas.
Jim
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Re: Engine Miss (jimhallhdg)
First off if the car is still broke then the dealer didn't fix anything and you shouldn't be responsible for payment. :mad
The first thing I would do is swap the #7 spark plug and wire with the #3, the #7 unfortunately is the worst one to get at but if you remove the rubber air hose going to the exhaust manifold it's a piece of cake, one clamp and 2 10 mm bolts and it will slip off and right out of the way, if this doesn't move the problem to the #3 cylinder then the wiring needs to be checked with a megger not a volt/ohm meter, the megger will put 500 volts on the wire and if it's open or close to a ground anywhere it will show up
The first thing I would do is swap the #7 spark plug and wire with the #3, the #7 unfortunately is the worst one to get at but if you remove the rubber air hose going to the exhaust manifold it's a piece of cake, one clamp and 2 10 mm bolts and it will slip off and right out of the way, if this doesn't move the problem to the #3 cylinder then the wiring needs to be checked with a megger not a volt/ohm meter, the megger will put 500 volts on the wire and if it's open or close to a ground anywhere it will show up
