what would make both coil packs not fire,and the fuel pump not work on a1998 mercury marquis 4.6 engine

20

Asked by Nov 17, 2015 at 10:20 PM about the 1998 Mercury Grand Marquis 4 Dr LS Sedan

Question type: General

12 Answers

47,415

First of all you have 8 coils on a 4.6, one for each spark plug. The fuel pump could be bad or need a fuse replaced. Is the check engine light on?

2 out of 2 people think this is helpful.
20

car won't start. no fire,and no gas coming through

1 out of 1 people think this is helpful.
20

could it be the computer brain

1 out of 1 people think this is helpful.
47,415

Pull a coil and put a spark plug in it. Ground the outside of the plug to a metal part of the engine and have someone crank then engine over. If you see a spark then you have eliminated that as a problem.

1 out of 1 people think this is helpful.
148,885

If you are sure there is no fuel to injectors and no spark, to all coil-on-plugs, the yes, with both failing at same time it very well could be the PCM, 'brain' failed

5 out of 5 people think this is helpful.
Best Answer
148,885

Good advice FoR

4 out of 4 people think this is helpful.
47,415

Hey Ford!

2 out of 2 people think this is helpful.
148,885

Good evening FoR. We agree on this, as we usually do

4 out of 4 people think this is helpful.
148,885

But some feedback would be good.

5 out of 5 people think this is helpful.
20

thanks. i will replace the PCM and reply to you what happened

47,415

Feed back is essential to good advice!

2 out of 2 people think this is helpful.
Best Answer
20

replaced the ECM,and the main brain.still no fire from coil packs, and no fuel.does the PCM have to be reprogrammed again for the car ?

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