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Mountaineer

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Q: Transmission
For this 2004 year Mercury Mountaineer they were only equipped with a 5R55S transmission for the 4.0 and 4.6 liter motors. The only different transmissions would be for rear wheel drive or all wheel drive. They are both 5R55S base...
Question
Enabling the park aid
The park assist feature on your vehicle is actuated by putting the gear shift into reverse. It is comprised of a speaker, the sensors, and the park assist module. The module will call for an alert sound when there is...
Question
does the plastic intake manifold warp and usally need repacement
There are reports of failure, and consequent leaks, of these plastic manifolds. Indeed, there was a settlement involving a range of Ford products years ago. However, looking at NHTSA data and other sources, I cannot find evidence of any particular...
Question
Power train light
Hi There, Code P1450 relates to the EVAP system in your vehicle and us unrelated to the power train malfunction you are referring to. Your car has a small purge valve with a purge solenoid in the Evaporative Emissions system...
Question
Bad vibration when accelerating.
This could be a result of the brake caliper sticking. A few different things can make the brakes stick or lock up. The master cylinder may be causing this if it has not been properly bled. If you loosen the...
Question
Oil pressure drops too low and then when I start the drive it goes back up to normal 2002 Mercury Mountaineer
Hello - low oil pressure at a hot idle is a normal indicator of worn engine bearings in a high-mileage engine. Since the oil light turns off when you accelerate indicates the oil pump is pumping more than 5 psi...
Question
Very slow coolant leak
Hi there. I wouldn't assume that you have a coolant leak based on coolant being present after the vehicle overheated. In most cases, the coolant will boil out of the radiator cap and cause this type of 'spillage'. If you've...
Question
i heard yo mu had to replace the wheel hub if the wheel bering damages is tht true
If wheel bearing is in need of replacement on this vehicle then you will need to replace the entire hub assembly with it since it comes as an assembly incorporated with the speed sensor.
Question
cannot figure out how to use the tensioner pulley for serpentine belt removal
Hello, and thank you for writing in. We currently do not have videos available to share with you, however we can do our best to walk you through the process and how the pulley works. What you see when you...
Question
I was driving and all of a sudden my car made a loud horrible screeching sound and it continues as long as the engine is running
The noise sounds like you have a belt pulley that is seized. You will need to either start the vehicle and look for the pulley to component that is not turning or will need to remove the serpentine belt and...
Question
Green fluid leaking in the rear of car
You have a leaking rear a/c heater system core or hose for the rear unit. You will need to keep the rear heater turned off and keep coolant in the engine full to prevent overheating the engine. Have the cooling...
Question
My 2008 Mercury Mountaineer seems to be burning coolant. Temperature gauge reads normal but after driving several miles I swear I
Hi there. It's possible that you're not using the correct coolant or the right ratio of coolant to distilled water. Unless the coolant bottle says "pre-mixed", it's likely that you're adding straight coolant instead of a 50/50 ratio of coolant...
Question
Cleaned air mass flow light was red . now unplugged or plugged in . started noticing car was dying at red lights and stumbled high
It should be safe to drive a short distance to purchase a Mass Air sensor. As long as the engine is not stalling or overheating and take it easy driving you should be fine.
Question
I have a 2000 mecury mountaineer. When driving spots in gears between 30 an 40. There is no back fire just misses.
The transmission has an accumulator spring that may be broken or the shift valve in the control module may have a broken spring. If an accumulator spring or a shift valve spring breaks in a transmission, the shifting will be...
Question
My car shakes violently when the brakes are applied
Hi Grace. Thanks for contacting us tonight. We are a bit confused by the description of your vibration; so let's provide a bit of detail for you. If the shaking occurs when you are fully stopped, then the shaking issue...
Question
I replaced the output shaft sensor. Do I need to reset the code?
Try removing the battery cables and letting the computer sit for about 1 minute and then hook up the cables or if you have a scanner that can erase the codes. This will clear the engine light and codes to...
Question
P0401
Hi Mushi. Thanks for writing in today. Sometimes the initial diagnosis based on the error code is not the actual source of the problem. In the case of the P0401, the code indicates that that the engine control module (ECM)...
Question
After replacing the ECM in a 2002 Mercury Mountaineer what will be the reason for it not to fire or start
On cars built after the late 1990's, replacing an ECU is a much bigger deal than just plugging in a new box. The ECU has to recognize the serial number of the car and the other modules in the car....
Question
Feels like front tires are locked up rubbing grinding now
If the vehicle is 4 wheel drive, it sounds like it could be stuck in 4WD. Another possibility may be that the differential i stuck in the locked state if it is equipped with this option. Lastly, you may want...
Question
2001 mercury mountaineer Shifted hard then 4wd low light came on and didn't want to go no power and barely moved
Hi Moo. Thanks for contacting us today. It is possible that an inner transmission failure has occurred, or perhaps (and more likely) that an issue with the differential is the source. The best way to determine what is causing the...

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