Found the problem....I changed the Idle Air Control Valve. Thnaks to all that answered my question.
Two things I can think of:
Carbon build-up on the injectors; solution: speed on the highway (65+ MPH).
Idle is set too low; solution: find the idling screw and turn it up.
You probably have a 4.6 motor? If so you may have egr passageways plugging up. Although they usually are a problem whem warm if this is true. Next guess is a sensor such as a coolant temp sensor. It monitors the coolant temperature and tells the computer to adjust the fuel/air ratio. It feeds it more fuel when cold to warm it quicker. If the sensor is telling the computer bad info it may be starving or dumping too much fuel in. The computer controls the idle (no adjustment).
I had similar problem on a 96. I changed the air mass flow sensor and it ran like a champ. Took about 15 minutes. Very simple. Part costs about $85 remanufactured. Dealer tried to charge me about $300 to replace!!!
Add your answer:
Related Questions
You would like the procedure for changing engine coolant on a 2003 mercury grand marquis gs?
how to changing engine coolant on a 1993 mercury grand marquis gs.
What is the part called that the water pump is connected to on a 1996 mercury grand marquis?
what is the part called where the water pump is connected to on a 1996 mercury grand marquis -------------------------- That would be the engine
Why would a 1996 mercury marquis not start with a good battery?
Might be you alternator. Happened on my 1997 grand marq a couple of weeks ago
How wide is a 1997 Mercury Grand Marquis?
I was looking at a ( 1998 ) Mercury Grand Marquis Owner Guide and it shows the body as being ( 78.2 inches wide ) I'm not sure how much the outside mirrors would add to that
What degree of thermostatic in a 1999 mercury grand marquis will work properly with the obd 2 system?
On a 1999 Mercury Grand Marquis : The Original Equipment engine cooling thermostat would have been ( around 192 * Fahrenheit )
Can a 2003 Mercury grand marquis transmission fit in a 2005 grand marquis?
Physically, yes. It would be best to consult an interchange reference to know if the wiring and programming are compatible.
Does the 2002 Grand Marquis have a cabin filter?
I would say ( No ) I was looking at the 2002 Mercury Grand Marquis Owner Guide and it doesn't show any reference to a cabin air filter
What degree of thermostatic should use in a 1999 mercury grand marquis with a v8 engine?
On a 1999 Mercury Grand Marquis , 4.6 liter V8 engine : The Original Equipment engine cooling thermostat would be : ( around 192 * Fahrenheit )
Why would a 1999 Mercury Grand Marquis start but then stall right away?
Likely the fuel filter is clogged so you need to change it. If you can keep the engine running by pumping throttle a few times at start up, and then it runs, check the filter; cost about $10.00. On My 1999 Mercury Grand Marquis I had to replace the Idle air control valve because it did stay running until it was warm
Why is the Chrysler 300 sought after for limo conversions but not the Mercury Grand Marquis?
The Grand Marquis is body-on-frame (same platform as the Lincoln Town Car, the classic American limo) and the 300 is unibody. Why would the 300 be sought after and not the Grand Marquis? They compete in the same price range.
Where is bank 1 sensor 2 on a 1996 Mercury Grand Marquis?
On a 1996 Mercury Grand Marquis , 4.6 liter V8 engine : Bank 1 is the passenger side of the engine Sensor 2 would be AFTER the exhaust has passed through the catalytic converter
What would make antifreeze come out of the defrost area on a 1991 mercury grand marquis?
Heater core leaking.
How do you remove rear shocks on a 1988 mercury grand marquis?
The shocks are there for a reason. Removing them would cause damage.
Can you get A diagram of PCV valve location in 1989 through 1999 Mercury Grand Marquis?
Yes, a person can get a diagram of the PCV valve location in a 1989-1999 Mercury Grand Marquis. This diagram would be located in the maintenance books found in auto part stores.
Shifter sloppy 1995 mercury grand marquis won't go into any gear?
I was not aware that the Grand Marquis came in a manual Transmission! If it was an Automatic Transmission I would say take it to a Transmission Shop and have it looked at.
What causes your 1999 Mercury Grand Marquis to start up and then die?
That's something you would have to look at yourself, we can't give you an answer unless you tell us in more... er.. detail.
Should you use premium gas in your mercury grand marquis?
If you value your car I would recommend it, it WILL run better that way.
What is the recommended antifreeze 1992 grand marquis?
A 1992 Mercury Grand Marquis would have come from the factory with a 50 / 50 mix of distilled water and GREEN color antifreeze ( meeting Ford specification ESE-M97B44-A )
What would make my 1993 mercury grand marquis not start after driving in the rain?
That depends, all I can think of is you drove it in deep water (over five inches) if you did, then it might have gotten water in the exhaust.
Where is bank 2 snsor 1 oxygen sensor on 1998 mercury grand marquis?
On a 1998 Mercury Grand Marquis : Bank 2 is the drivers side of the engine Sensor 1 would be in the exhaust close to the engine before the exhaust enters the catalytic converter ( upstream sensor )
How do you install an inner tire rod for a 98 Mercury Grand Marquis?
It would really be best to go to a wheel alignment shop.
Would a napa gold oil filter 1372 fit on a 2000 mercury grand marquis?
Yes, that is the correct part number.
What is the biggest rim you can put on the mercury grand marquis?
24 inch would fit if you don't plan on driving it over anything but perfect roads. 22 is probably a safer bet. Anything over 20 is ugly on a Grand Marquis.
What kind of anti-freeze should you use 4 your 1994 mercury grand marquis Should it be regular or mixed?
A 1994 Mercury Grand Marquis would have come from the factory with a 50 / 50 mix of distilled water and GREEN color antifreeze ( meeting Ford specification ESE-M97B44-A )
What wheels will fit a 1986 crown Vic lx?
Wheels from a concurrent Mercury Grand Marquis or a Lincoln Town Car would fit.
