Tuesday, September 05, 2006

Chrysler Intrepid 3.5L engines with misfiring problems.


This engine misfires all the time and it happens at all speed whether the engine is cold or hot. It has direct ignition and has no spark plug wires. Instead, it has coil wire boots fed on top of each cylinder. What is the quickest way to check this misfiring?

Basic Concept:

On this type of engine, the heat build up in the engine will cause a breakdown in the coil wire boots that will arch and cause the misfire. Try unplugging the coil wire boots and have a look at the rubber insulation. If you see a brown spot, it shows the boot is arching.

Repair Strategy:

After pulling out the coil wire boots and you see even one boot arching, replace the coil wire boots as a set. (if one goes, the rest is not far behind). For more details in the repair procedures, please contact ATS.


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