Question about Cars & Trucks
It would be my guess that your Catalitic converter is plugged off. Being an 89 model I would say it would be time for a new one. I am not recommending that you punch the clay out of it but if you make a hole through the honeycomb and it runs alright, then I would replace it. Be sure to get all the pieces you break loose out of there cause it will go on back to the muffler and stop it up.It is best to remove the converter to do this.
I hope this leads you to solving your problem.
Posted on Apr 22, 2014
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Sure, the more the throttle and the longer its open the more gas is being injected so if the spark is not there it will spotter. I think you have nothing to loose with an ignition tune-up. It'll be more economical than taking it to a mechanic and still ending up with the same problem. You should change the fuel filter also it could be clogged and there is'nt enough fuel delivered at these speeds. You can also try a fuel injector cleaning solution the kind you pour in the gas tank. This might work for you.
Posted on May 19, 2009
this is a very common problem on these vehicles. the wiper motor has a park switch built into it that fails. replace the wiper motor and this will stop problem. hope this info helps you!
Posted on Sep 22, 2009
My 2003 Mercury Grand Marquis has the same problem. We found out it was the headlight module located under the dash above the gas pedal. The black box has wire connectors coming out of the back. Hitting the box worked for a little while, then I had to reach in the back and wiggle the wire harness. The dealership wants 500.00 to replace the unit. I consider Highway Robbery! They have installed a faulty piece of equipment on my Luxury car that could easily be life threatening but we know it won't be recalled until someone dies because of it. My husband was able to remove the unit and looked it over it had two circuit boards and he was unable to visibly see any problem or loose wire. He cleaned the connectors and used some electrical terminal grease on the wires, this improved it for a short time. The problem still exsists. I have sat for 30 minutes or more waiting for them to go through the On/Off cycle till they stay on for the 45 minute ride home from work. I have beat the box with my flashlight (maglights handle the abuse, my fingers and nails don't) till it came loose from the brackets that hold it. I leave my car running while pumping gas, short shopping trips and start it 20 or 30 minutes early before leaving for work. It is frustrating and dangerous. If this is the kind of quality in our American made cars it's no wonder they needed a BailOut! The only thing we have found to "fix" it is to find a used part that could possibly have the same problem shortly down the road or pay the theives at the dealership to replace it.
Posted on Dec 31, 2009
There are eight COPs (coil-on-plugs) to remove. Using a 7mm or 9/32" socket, remove each bolt securing each COP to the intake manifold on top of the engine. Remove all eight COPs, and the spark plugs are underneath. When replacing the spark plugs, use only the proper Ford/Motorcraft plugs, even if they cost twice as much as the aftermarket ones. You will avoid further headaches this way. Hope this helps.
Posted on Mar 30, 2010
Tips for a great answer:
Apr 16, 2016 | 1988 Mercury Grand Marquis
Aug 19, 2012 | 1989 Mercury Grand Marquis
Oct 17, 2011 | 1994 Mercury Grand Marquis
Sep 18, 2011 | 1989 Mercury Grand Marquis
Sep 18, 2011 | 1989 Mercury Grand Marquis
Mar 14, 2011 | 1989 Mercury Grand Marquis
Sep 21, 2010 | 1989 Mercury Grand Marquis
Oct 24, 2009 | 1992 Mercury Grand Marquis
Sep 01, 2009 | 1989 Mercury Grand Marquis
Dec 01, 2008 | 1989 Mercury Grand Marquis
12 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: