84 GRAND MISSING

1984 Mercury Marquis

Tiny

john soard

November, 17, 2010 AT 2:19 AM

I have an 84 Grand Marquis that is missing when I give it gas after I first start the car. It completely goes away and runs smooth after I drive about 1 mile. I changed plugs and wires and fuel filter.

FOUND 4235 RELATED QUESTIONS

Running Rough

27 ANSWERS
34 IMAGES

Idles Rough/changed Ects

37 ANSWERS
3 IMAGES

1 Answer

Tiny

rasmataz

November, 17, 2010 AT 2:26 AM

Engine running rough or misfiring can be cause by the following:

http://www.2carpros.com/articles/engine-misfires-or-runs-rough

1.Defective spark plug
2.Inadequate spark/coil,defective spark plug wire.
3.Lack of compression
4.False air leakage.
5.Faulty fuel injectors.
6.Insufficient fuel pressure.
7.Contaminated fuel.
8.EGR valve that is leaking.
9.Oxygen sensors.
10.Throttle position sensor.
11.Manifold absolute pressure sensor

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