Where is the ignition module located?

ARTFLO

MEMBER
1998 MERCURY MARQUIS
155,000 MILES

Where is the ignition module located on a 1998 Grand Marquise 4.6 L GS?

Thursday, November 15th, 2012 AT 4:27 PM

3 Replies

WRENCHTECH

MECHANIC
20,761 POSTS

It doesn't have one. The PCM does that job.

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Thursday, November 15th, 2012 AT 4:35 PM

ARTFLO

MEMBER
2 POSTS

I have replaced PCM and the Crankshaft position sensor and all 8 coil on plugs and it still runs very ruff.

What else is there in the ignition system of a 98 Mercury Grand Marquise 4.6L GS?

PCM replaced, Position sensor replaced, COP replaced.

Arthur

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Thursday, November 15th, 2012 AT 4:42 PM

RACEFAN966

MECHANIC
5,029 POSTS

It don't have one, it uses cam and crank sensors to tell the PCM that the engine is turning over and then that starts the firing order sequence by firing the injectors at the proper time. You didn't mention anything about replacing spark plugs and if so what brand and type did you use? It may be a bad injector.

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Thursday, November 15th, 2012 AT 4:55 PM