Question about 2004 Mercury Mountaineer
Engine will not start
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Posted on Jan 02, 2017
SOURCE: I am driving down the
Now you have to stop using it,sorry
You have two main Fail Safes
One is overheating
Yours is IGNITION COIL MISFIRES
Without getting in a long technical story
the individual coils you have COP Ignition System,
either slowly fail and set no light,or set a code
In your case it doesn't matter because the codes won't help much
You most likely have a really bad ignition coil
It does not ground out as it should in the PCM (computer)
That spike comes back on the TPS Sensor (throttle position)
and then you lose the TPS normal Data that is the result
of where you push on the gas pedal
At that point there is no way to adjust fuel injector pulse,so
it starts killing cylinders and eventually goes into ETC Fail-Safe
Your Done-- Also there may not be many professionals that
will believe me. Been there done that.
Ideally a shop that actually uses an oscilloscope can solve
which coil is bad
You can buy 1 coil for $60.00 & walk it from one cyl
to the next and after a week fix it for $60.00
I will tell you, people have spent $3000.00 at dealers
& got zip.
In the event my story if off,
your next problem would be the
TACM (throttle actuator control motor )
That will be your codes. Do Not let the codes
guide you or your repair shop. The throttle body
is $700.00. If you do need one, you better be installing
Posted on Mar 31, 2011
SOURCE: i have a 2004 mercury
Hi, your truck must use a stepper motor to control the throttle. The computer is getting a signal from the accelerator position sensor and trying to rotate the throttle, but it is having trouble either rotating the throttle or sensing the position of the throttle. If you can give me the exact trouble code, I may be able to say more about what the problem is.
Posted on Aug 07, 2011
The airbag light comes on if the airbag computer detects a trouble in the system.The only moving part that gives out due to wear and tear is gonna be the"clockspring"in the steering column(this is a printed circuit board on a plastic ribbon that is coiled up so that there will be a solid,reliable connection to the bag,instead of a brush contact that would have resistance).Most manufacturers also use this coil to connect to the horn button (only requires one more conductor).Many times the horn will be inoperative or cuts in and out when you turn the wheel.A steering wheel puller is probably the only special tool you'll need to replace the clockspring.
Posted on Mar 14, 2012
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