Hello, I'm hoping someone can help us, my son and I are losing our minds over my 2002 Intrepid 2.7. A week ago while my son was driving it, the electrical system went awry, gauges jumping around, rough running and wouldn't shift. Then it shut down, wouldn't start, dead battery. I drove another car to him, jumped the battery, it started, brought it home, about 3 miles. We decided on the alternator, I towed it to his shop, he replaced alternator, battery was very dead, he put a different battery in it that was good. He drove it for 3 days, then it shut down again, same as before. We checked fusable links, it was getting power from alt. to battery but not charging the battery. Found the negative battery terminal connector not tight, replaced the connector. Found the ground wire from right (Passenger) side of engine to fender broken. Spliced it back together, hooked up jumper cables, car started, ran rough (like a missing cylinder) raised idle to around 1000, middle coil on plug, passenger side blew out, car shut down. Replaced coil, no start. Found blown coil/inj fuse, replaced, but blows every time we crank engine. Checked coil capacitor, noticed that as soon as capacitor touches it's connector, fuse blows. decided the coil capacitor on pass. side is bad, can't get one until Tuesday (this is Friday) Capacitor is .47 uf, bought 2 .225 uf capacitor at Radio Shack tried hooking them in tandem and parallel, same result, cranks, no start, coil/inj fuse blows. Any advice would be appreciated.

 

You need to get someone to check coil driver and ASD operation on all 6 coil control ckts. It appears one of them is staying grounded on the control side or the ASD supply is shorted to ground. You may have a wiring problem or a PCM problem.

 

Sorry it's taken me a couple of weeks to finalize this. It was the ECM. I replaced the condensers and the ECM. I'm thinking the voltage regulator failed and the resulting surge caused a short in the computer and popped the coil. Seems to be OK so far. I hope reading this helps someone else.