Question about Mercury Grand Marquis

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2004 Mercury Grand Marque LS Upon start up, Engine races to fast. Must let it idle for a minute or two. If not, car will go as fast as 14 MPH

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Mass air flow sensor or throttle position sensor defective

Posted on Aug 03, 2008

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Engine wont catch


Catch?
cranks fast
starts every time.
idles fine hot or cold , or both? hot idle not too fast.
i race engine , in park and neutral, I can hit 3500 rpm easy, can you.
i release brakes, (brakes are not packed in ICE , are they?)
I select 1gear or reverse (A/T or m/t)
the car moves or dont move, which is it, my guess catch = no move at all.
I try to drive, i look at RPM and MPH
RPM moves up and MPH track.
track means they both move in a linear progression.
RPM rises and for all RPM increases MPH also increases.
does it?
if all that works then we have an engine power issue.
weak on hills?

Jan 03, 2014 | 1998 Jeep Cherokee 4WD

1 Answer

2004 mercury grand marque check engine light on code is p0108 says map sensor or vacum leak but does not have leaks.this car does not have map sensor what else needs to be replaced


PO 108 --- Baro/Map Sensor High Voltage Detected

Yes it does

It is integrated into one unit in the ESM EGR assembly
(possibly)

I have no experience with that,so if you find only an egr valve
& no other sensor with vacuum hoses & wires going to it,replace
the egr valve.

Getting the feeling you missed it

Work the web sites. Put in your motor & EMS Module for egr
& see what comes up

Sep 21, 2011 | 2004 Mercury Grand Marquis

1 Answer

Where can I find a digram of the fireing order for a 1997 Grand Marque?


start here, and choose the size engine you have.

http://autorepair.about.com/library/firing_orders/bl-mercury-firing-97.htm

Apr 14, 2011 | 1997 Mercury Grand Marquis

1 Answer

I have a 2002 Grand Marque: fuel starvation during starting


TRY RUNNING A BETTER GRADE OF GAS ALONG WITH 2 BOTTLES OF FUEL INJECTOR CLEANER FOR 2 TANKS OF GAS.

Mar 07, 2009 | 1992 Mercury Grand Marquis

1 Answer

Curse control on 2004 mercury grand marque does not work.


the most common cause of this problem is the clock-spring rotating contact under the steering wheel, it has an open circuit in the circuit ribbon.

Dec 09, 2008 | 2004 Mercury Grand Marquis

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