As for the car accellerating on its own, I don't know about that one. Is there anyway other way to figure out the problem besides taking it into the repair shop. You'd have to go to an Auto Parts Store that has a scanner… Several things need to be checked if a 1999 Mercury Grand Marquis is hesitating when accelerating. The problem is when I turn the car off and turn it back on the check engine light does not come on so the hand held ford code reader that I bought will not read any code. I was driving the car today and it drove normal. Interestingly, I had the same problem with my 2000 Grand Marquis im may and June 2005.
You will greatly increase the Horse power of the Grand Marquis. Flashing Check Engine Light: If your check engine light is flashing, stop driving your Grand Marquis and have it towed to your nearest mechanic - you probably have a very serious problem with your car and you risk ruining your engine by driving it. I try to learn as much as I can but I barely understand any of it! Can this cause severe mileage loss is there really is a Evaporator Canister leak, hose leak, or if the purge valve or vent solenoid has become defective? I'd get it to auto zone to scan the codes again before going to any extreme repairs. Like i said, take it to autozone get it scanned, send us the code and I'm sure we will be more than willing to help. The check engine light is on. It happens every five or six minutes with the same result.
I have had similar problems and this type of problem is typically caused by air or fuel problems. Generally, a check engine light is lit when there is a problem in the emissions or somthing that is affecting the effectiveness of the emissions. But I never found any coolant leaks. Turn the traction control off before you start driving and see if it keeps the traction control light flashing from occurring. A flashing check engine light means that an engine cylinder misfire has beendetected. Yesterday Mar 1, 2007 the engine shut down 4 times! This should reset the Computer Or used to - if the light comes back then I'd say you have a bad sensor somewhere.
The other issue with it is that when I come to a complete stop or turn into a parking spot after it has happened, the call stalls and shuts off completely. You can drive the vehicle in forrepair , just avoid any rapid acceleration or deceleration because you candamage the catalytic converter A check engine light flashes when an engine cylinder misfire has beendetected. Thanks, Dan That is relatively a simple fix. The check engine light comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. In some cases you need to pull over immediately to prevent damage while in others you merely need to tighten you gas cap next time you stop in order to reset the service engine soon light. I have a 1994 grand marquis and my check engine light keeps coming on.
Only replace the ones that fail during the stress test. It's always hard to diagnose a car without actually looking at it, but i'm sure there are plenty of people who can give you step by steps on what to do. Any help will be appreciated. Does the hesitation only last a few seconds until the car is slightly warm? Happily consuming the fuel saved by Prius owners! In 2005 I wrote numerous letters to Ford and they were completely unresponsive. Its pretty common on the '96-'01 4.
Forgot to reconnect the air intake connector. You can get the revised manifold for the older cars. The vehicle has not been diagnosed by the dealer. I would recommend going to and taking a look at our conversion kits. I put in alot of money on my 96 tbird, totaled that and now I do not want to repeat the past, I am tired of spending money, and people talking over me because I am female when I go to the mechanics. My guess with the acceleration issue would be that it was missing, and you were applying throttle at the time, well the coil decided to stop missing and at that time the engine got its power back The accelerating on its own!! The real problem was with the programming of the power control module which was confused and overwhelmed by one bad spark plug.
Reconnected the plug on the intake, but the check engine light stays on. It seems it is very common for these coils to fail and cause misfires, especially if they have 100,000mi+. Well my pop pop said he didnt feel it so I just ignored it, so recently within the past few months, my check engine light came on and car was shaking. Engine shut-downs on Mercury Grand Marquis are a serious safety issue and should be corrected. It is a 1999 Mercury Grand Marquis 4. The gauges were all normal as well.
You will need to have a coil-on-plug stress test done. I knew it was bad, but I drove to the garage anyhow. If the check engine light is flashing a misfire has been detected. My Research came upon this: I have run into the coils on the causing that very concern. Have some one do this test and this will fix your problem. Ordered new injector, installed, cleared code and ran like a champ. Did the pump go out as it was on the lift? Try disconnecting the Battery Cables.
As long as you have a good battery it should read the last set of codes posted. The car also seems like it is shaking when I try to accelerate from a higher gear when that happens. Intermittent Check Engine Light: If the check engine light on your 1999 Grand Marquis is intermittent, try to take note of the conditions when this happens. Steady Check Engine Light: If your check engine light is on every time you operate your Grand Marquis, you need to have it checked as soon as possible, especially if you notice performance problems or unusual noises. The problem recurred and she again took the car to the dealer. Jun 14, 2012 Yes they both use the same basic 4.