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

92,025

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 of 2 people found this helpful.
20

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

1 of 1 people found this helpful.
20

could it be the computer brain

1 of 1 people found this helpful.
92,025

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 of 1 people found this helpful.

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 of 5 people found this helpful.
Best Answer Mark helpful

Good advice FoR

4 of 4 people found this helpful.
92,025

Hey Ford!

2 of 2 people found this helpful.

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

4 of 4 people found this helpful.

But some feedback would be good.

5 of 5 people found this helpful.
20

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

92,025

Feed back is essential to good advice!

2 of 2 people found this helpful.
Best Answer Mark helpful
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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