WHY WONT THE CAR START ON A NEW COIL BUT IT WILL THE OLD ONE? AND IT MISSES.

2001 Saturn L100

Tiny

Jrscars

December, 2, 2011 AT 3:25 AM

I replaced the ignition module with a new one, the miss persists, also I notice when the lights are on everything flickers a little, but the battery is charging at 13.8. Do I have a possible short in the ignition system? What a nightmare.

Tiny

rivermikerat

December, 2, 2011 AT 3:37 AM

It sounds more like either the alternator going out or a ground issue. Check the grounds for the coil packs as well. Check the condition of all the wires.

Tiny

Jrscars

December, 5, 2011 AT 11:24 PM

Got a coil pack and module together at a salvage yard, it came off of the same car. It works, but only with the module that came with it. The module that was on the car will not work with the one I got from the salvage yard. It does appear to have fixed the miss. So apparently, coils and modules have to be sold in sets.

Tiny

saturntech9

December, 5, 2011 AT 11:37 PM

Thats why I always have a coil assembly with module to swap out. But I have never ran into the problem you had at saturn the coil came as a assembly less themodule.I would then swap over the module from the car and it worked great. But those were all factory parts. Maybe some of the aftermarket coil or modules have a compatiabilty issue?Glad to hear you got it figured out though.

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