1990 Mercury Grand Marquis Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 Mercury Grand Marquis

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1990 Mercury Grand Marquis
$
490
to $
745
1990 Mercury Grand Marquis
$
219
to $
406
1990 Mercury Grand Marquis
$
82
to $
115
1990 Mercury Grand Marquis
$
271
to $
379
1990 Mercury Grand Marquis
$
423
to $
674

1990 Mercury Grand Marquis Problems

Engine Performance Problems Due to Failed Throttle Position Sensor

The throttle position sensor (TPS) may fail. Common symptoms of a defective TPS can be rough idle, hard starting, hesitation on acceleration, poor fuel economy, and stalling.

EVP Sensor Failure May Cause Drivability/Fuel Economy Issues

The EGR valve position (EVP) sensor can fail on this vehicle. The EVP sensor measures the EGR valve position and transmits the date to the engine control computer. If it fails, drivability and fuel economy can suffer, the Check Engine Light will commonly illuminate.

Engine Stalling and/or Hesitation on Acceleration due to Faulty Idle Air Bypass Valve

If you experience difficulty starting the engine when cold, stalling at idle, or hesitations during acceleration, it may be the idle air bypass valve. This valve helps the vehicle idle steady when the accelerator pedal is not pressed.

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1990 Mercury Grand Marquis Questions

My car has no spark and no power to fuel pump why changed coil solenoid ignition (1 answer)

I drove my car home from work was fine an hour later wouldnt start. I changed ignition switch, solenoid, coil, cut out wires with cracked insulation got power to coil but no spark coming out thats y i changed coil. wires in harness to module under dist. Cap were bare and touching so i checked fus...

car starts without ignition on solenoid wiring diagram solenoid on fender (1 answer)

1977 mercury grand marquis

Why does the horn get stuck on my 1988 Grand Marquis & how do I disconnect it ? (2 answers)

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1990 Mercury Grand Marquis Recalls

Recall 90E043001
THREADED INFLATOR COMPONENTS MAY HAVE BEEN DAMAGED DURING ASSEMBLY WHICH MAY ALLOW COMPONENTS TO SEPARATE WHEN INFLATOR RECEIVES A SIGNAL TO DEPLOY THE AIR BAG.

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1990 Mercury Grand Marquis Reviews

Rated
based on 2 customer reviews
Hi i am 15 and this is my first car i paid $500.00 for it. it has a major gas and oil leak and had its tail pipe ripped off but, overall its a nice car. its got a 5.0 liter V8 in it. its extremly quiet for a V8 and with no tail pipe its still quiet. its also got ajustable air shocks. a mini air compresser kicks on when it runs. i think its for the shocks but it could also be for the vacume sys...
I REALLY DIDNT LIKE FORD OR MERCURY BUT THIS IS MY SECOND FORD PRODUCT AND IT RIDES SO SMOOTH IT LOOKS LIKE A LINCOLN RIDES LIKE A LINCOLN HAS ALL THE BELLS AND WHISLES.

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