Question about 1993 Mercury Cougar

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1993 Mercury Cougar Hesitating and Cutting Off When Cold

I am having a problem with my 1993 Mercury Cougar (3.8L V6 F.I.) when I first start the engine. It starts up every time as always, and idles smoothly. But when I press the gas slowly while the engine is still cold, the engine hesitates then picks up. I see the dip every time on the tachometer. If I press the gas too hard, the engine dies sometimes. The weird thing is, if I let it warm up for 5-7 minutes, the problem clears up and the car runs fine from then on. A couple days ago, I started out without letting the engine warm up and it died at the first traffic light and would not restart. After pushing it out of the road and finally getting it restarted, I let it warm up and it ran fine. Whenever the engine warms up to a certain temperature, the problem goes away.

Before I tear into it and start changing parts, I thought I would ask for any advice or ideas, which would be greatly appreciated!
Thanks!

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  • yadayada
    yadayada May 11, 2010

    have u run the trouble code tests on the electronics yet? do a key on engine off test and a key on engine running test, u will need to buy a used Ford Star tester off Ebay to do these tests.

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Try changing your egr valve first

Posted on Feb 11, 2009

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