Question about Mercury Mountaineer
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
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Posted on Jan 02, 2017
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