1992 Mercury Cougar firering

JUNIOR MARTIN

MEMBER
1992 MERCURY COUGAR
V8
2WD
AUTOMATIC
150,000 MILES

My car will run fine for a while and then just out of the blue it will quit firing and I will get out and take the coil wire if and sumtimes it will start firing, co I changed the coil, dastibuter cap, roter button and the coil wire and it will just stop firing again but now it's getting to where it wont even fire when I mess with the coil and so on, but it can set for a while and start wright up and run fine untill it's ready to do it again a day or 2 later. It's a 5.0 ho

2 Replies

DOCFIXIT

MECHANIC
18,828 POSTS

I'll put my money on a whacked out Thick Film Ignition Module located behind right head light.

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Tuesday, July 28th, 2009 AT 2:27 PM

RASMATAZ

MECHANIC
75,992 POSTS

Next time it won't start check for fuel and spark

Disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, cap and rotor /distributor pick-up coil, ignition control module, ECM, Ignitor cam and crank sensors- Note: If it doesn't apply disregard it