Question about 1999 Mercury Cougar

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My cougar is running like **** i have replaced all the co2 sensors and the egr value. the car has poor accleration and chugs until i hit the drive gear. the engine light stays on but when i step on the gas it will flash for a bit then stay on. i have read of this problem online and the solution seems to be a sensor located just below the thermastat but i don't know the name of this sensor can you help with this and or give me another solution

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  • cheap repair Oct 04, 2010

    The job will be much easier to diagnose with the trouble codes. Some auto parts store will read the computer for free, autozone. Check back with the codes to save some $$$

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  • Mercury Master
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Sounds like you have a misfire. A common cause for the check engine light to flash. Reading the codes that are causing the check engine light will help you identify the problem a little easier.

Some things you can check are the condition of the spark plugs and wires. Check for carbon tracking on the plugs and where the spark plug wire boots meet the spark plugs. They will look like black lines running down the spark plug or wire.

You can also spray the wires down with soapy water while the vehicle is running and look for leaking spark. If it leaks they need to be replaced.

Posted on Oct 04, 2010

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  • Mercury Master
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If you have the 4-banger, it's probably the crankshaft position sensor. Is your engine light on? If yes, get a scan to make sure which sensor is bad.

my cougar is running like **** i have replaced all - 7eb9f15.gif

Posted on Oct 04, 2010

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1 Answer

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I have a 1994 chevy work truck with a 305. I have trouble codes # 15, 22, 33, 34, 44, and 53. The egr valve had been removed but apeared good. Someone had put a plate over the port. Additionaly someone...


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