Question about 1999 Mercury Cougar

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ENGINE MISFIRE TO THE POINT, THE CHECK ENGINE LIGHT COMES ON. AN IT WILL START TO FLASH. AN WONT GO OUT UNTIL YOU TURN OFF THE CAR .60-65 IT WILL STOP, AS SOON AS THE CAR START TO SLOW DOWN.IT START ALL OVER AGAIN.

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Wait untill its dark outside, open your hood and start the engine. look around for white / blue or yellow flashes of light coming from your plug wires. most of the time the spark plug wires are worn out / degraded from heat , and you can see the small lightning flashes in the dark. if you see no light flashes ( shorts to ground) then you can have a cracked / faulty distributor , or bad spark plugs.

Posted on Jul 31, 2010

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I have noticed when imtrying to speed up the car will putt and will flash the check engine light comes on I am not getting good gas mileage


If the check engine light is flashing , that means that a catalytic converter damaging event is happening . You have a misfire . It's time to take your vehicle to the repair shop before you wreck the catalytic converter . A new one can cost up $800.00 .
Best Answer: A flashing MIL, means there is a 'class A' misfire that is present. This type of misfire WILL ruin the catalytic converter(s), if the problem isn't fixed in a timely manner.

May 04, 2016 | 2003 Oldsmobile Alero

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My car has started to shudder and the engine light plus the ABS and T/C lights have come on. What does this mean?


When the check engine light comes on it will usually disable the traction control which is also tied into the ABS as a safety feature resulting in their lights to come on. The shudder may be caused by a cylinder misfire which in turn should cause the check engine light to flash when the misfire occurs and will keep the check engine light on. Have the computer scanned for codes to see if a misfire is present and correct from there. It may be as simple as a spark plug/ignition coil failure. When the problem is corrected and the codes cleared, the lights will go out

Feb 13, 2016 | Cars & Trucks

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My 92' Covette cooling fans start up about 10 seconds after I start up the car cold. Then the check engine light comes on. After about 7 minutes, the fans turn off and then the check engine light goes out....


Hey Les , how's it going ? The thing to do would be hook-up a scan tool an see what the ECM is seeing as far as engine temperature data ! Could have a shorted coolant temp. sensor . And when the check engine light is on a trouble code is present an should point you in the right diagnostic path . For some reason the engine computer thinks the engine is hot when it's not. Choosing an Automotive Scan Tool EricTheCarGuy

Mar 03, 2015 | 1992 Chevrolet Corvette

1 Answer

Car wont run below half a tank


If it has a timing belt,that is your problem

The exhaust converter & all the oxygen
sensors will have to be replaced as they
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Check fuel pressure also after you resolve

Nov 20, 2012 | 2001 Pontiac Grand Am SE

1 Answer

My problem is no engine light, when check engine light comes on, engine starts for a few minutes but then shuts off, then I have to wait until the light comes back on again, what can be causing this p


Hi there:
When the light comes on, one or more diagnostic trouble codes (DTC) are stored in the engine control module. These DTCs remain even if the light goes out. To address a Check Engine Light problem, the DTCs are retrieved and the appropriate troubleshooting information is followed in order to determine the problem.

The four most common Check Engine Light scenarios and what to do:
* The Check Engine Light turns on and off or flickers.
If the Check Engine Light comes on in the city but goes off on the freeway, then the fault is present during city driving conditions. Pay attention to whether or not the vehicle runs or drives any differently when the Check Engine Light illuminates. If vehicle performance does change, drive the car as little as possible and take it to be checked by a service professional as soon as possible. If there is no change in vehicle performance, you can drive home, but have it inspected as soon as possible. In this condition, you run a risk of the vehicle dying or not starting.

* The Check Engine Light comes on and stays on.
If the Check Engine Light illuminates constantly during driving with no noticeable driving or performance problems, there is a permanent fault in the emission control system. When this happens, the computer that controls the emission system usually has a backup program that runs while the fault is present. (These backup programs are often referred to as "limp home" mode programs.) You should get the vehicle serviced as soon as possible, but in most cases, the vehicle will continue to operate, though you run a risk of it dying or not starting.

* The Check Engine Light illuminates, stays on, and there are performance problems.
This means that a vital component of your emission control and engine management system has a serious problem. It usually involves a component or system needed for the vehicle to run at all. In most cases, drive the vehicle as little as possible. In many cases, the vehicle is not safe to drive at all -it could stop or stall out at any moment. It is best to pull over to a safe place and have the vehicle towed to an automotive diagnostician for a thorough inspection and repair.

* The Check Engine Light light comes on and blinks in a steady pattern while driving.
Don't confuse this steady pulsing of the Check Engine Light light (usually one or more flashes per second) with a flicker (see above). The Check Engine Light may stay on steadily or it may flash when the vehicle is accelerated. This is very serious. There is a severe failure of the emission control system that is causing the engine to misfire to the point that the catalytic converter is damaged each time the Check Engine Light flashes. It may mean that the catalytic converter is overheating to the point that it will glow red or, in extreme cases, start a fire on the underside of the vehicle. Immediately pull over to a safe place and have your vehicle towed to an automotive diagnostician for repair. Vehicles can be severely damaged and even destroyed by fire if this condition is ignored for too long.

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Jul 25, 2012 | Volkswagen Jetta Cars & Trucks

1 Answer

Car wont start


most of the time if the check engine light is not alluminated it is a bad engine controller.(computer).

Mar 21, 2009 | 1992 Lexus Sc 400

2 Answers

I have a 1996 oldsmobile cutlass supreme sl 3.4l and sometimes my car will shake a little and the check engine light will come on and sometimes i will be driveing and when i hit the gas and take off fast...


the flashing check engine light is indicating a misfire. if you can't get it scanned for codes, start with the obvious, check plugs, wires, and coil packs first.

Feb 21, 2009 | 1996 Oldsmobile Cutlass Supreme Coupe

1 Answer

P0301 fault code #1 misfire- warning lights


Hi, I'd focus just on that cylinder for now, unless the other lights come on again. This ought to give you enough information to start diagnosing the problem - http://www.obd-codes.com/p0301 - good luck!

Dec 22, 2008 | 2000 Oldsmobile Intrigue

1 Answer

Will not start until engine light comes off


u should check your engine since your engine light comes on first

Jun 27, 2008 | 1992 Honda Accord

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