Question about 1994 Mercury Cougar

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I have a 1994 mercery that runs good but when it is wormed up and i shut it off it will not start back untill it cools off.it does not have any fire to the plugs but when it cools down it starts up and runs great .it does not quit driveing or anything it runs great

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  • lukeevans32 Sep 04, 2009

    i thought that to but i had the ignition module tested six different times and every place said it was ok the ford dealer put a new one on the car and it still is doing the same thing it does not give any codes

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These are well known for the ignition module failing when they heat up when the power is turned off the resistance is to high for the module to restart

Posted on Sep 04, 2009

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Runs fine until it gets warm or hot then cuts off then cools and will recrank


Does it crank over when the engine is hot. If it does sounds like your maybe loosing fuel if so check fuel pressure if t is good check for spark could be a bad crank sensor or bad distributor.

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Starts and runs good when cold , shut engine off after motor gets hot , will not start back. After I let the engine cool down it will start back. When weather is cooler starting back is not a problem ,...


Sounds like the coil has gone bad. This is usually the syptoms of this. When it is in the non crand status cool the coil down quickly with ice and see if it doesnt crank.

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Hi, i have a 1991 isuzu rodeo with a 3.1 v6 5sp 4x4 with tbi. It starts ok when its cold and seems to run just fine however once its warmed up if you shut it down it wont restart. this was a sudden thing....


You might want to check the coil after the engine has wormed up to see if it is breaking down and not fireing the spark plugs. Use an in line spark tester to check between the coil and the spark plug wires to see if it is firing the plugs after the engine has gotten worm. Have someone to turn the engine over while you watch the tester for fire. Hope this will help you.

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I lave a 1994 mercury cougar with a 3.8l that will start run and drive anywere but when i shut it off it will not start back untill it cools off.i replaced the ignishon module and had it in the shop and it...


common problem is pick up in dist... ignition module is the first thing but you have replaced.... with out a lab scope to see the signal i would confirm what i am missing make sure good fuel pressure big problems with fuel pump relay... if fuel press good.. then make sure power on coil during cranking.. if good then clip the ground clip on test light to the positive battery terminal and back probe both wires on coil while someone cranks one wire shoul have pulse look good.. if good should have spark if not chuck coil.. let me know

Sep 04, 2009 | 1994 Mercury Cougar

1 Answer

Quits running after it starts to warm up under 1 mile


Try your ignition coil. That year model chevy has a dry running coil and it does not go out all at once. It will spark and run while cool but just as soon as the everything starts to heat up the resistance in the coil begins to build and it quits firing. After letting the vehicle set a little while and cool off it will fire off and run just fine untill it starts to heat up again.

Jul 20, 2009 | 1994 Chevrolet Suburban

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On my f150 5.0 it starts good cold but after i drive for awhile maybe 5 miles i shut it off and start it again it is ok.But if i wait 15 min it wont start.you can try but after it cools off it will start...


It could be a spark plug problem..I would remove a few of them to see what they look like. It may not be firing very well when it gets hot, and new spark plugs are never a real bad investment, since they're generally very cheap. Not sure on this, but it's a good place to check.

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