Question about 1999 Mercury Grand Marquis

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I Have a 1999 Grand Marquis that's misfiring losing power high fuels smell come from tail pipe. While driving for a min check engine light blink on in off put it on a machine in it told me

I Have a 1999 Grand Marquis that's misfiring losing power high fuels smell come from tail pipe. While driving for a min check engine light blink on in off put it on a machine in it told me coil pack 2 misfiring so I chance.. Spark plug,Coil pack,injector,egr valve,mass airflow sensor... Still getting the same problem car have no catalytic converter will that cause problems

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1 Answer

If you have no exhaust converter:

You are violating Federal Regulations
You can not go to inspection
Your poluting the air
You have no place for your oxygen sensors to go,so you
have no fuel control at all & thus it has a misfire

No vehicle can be used like that

There is no test equipment that tells you what is wrong

You have to use the data to find a problem

Why would there be no converter on the car?

Posted on Dec 01, 2014

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landsend
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SOURCE: misfire in cylinder 1 2001 mercury sable

Next change swap the injector with another and see of the problem moves.  If it does it's a bad injector.  

Posted on Mar 26, 2009

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SOURCE: misfire on cyl no 1 on a 01 merc grand marq

need a noid lite to check injector and coil pulse

Posted on Apr 25, 2009

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SOURCE: 2000 mercury cougar is hestating when you step on

a multiple misfire code can relate to a fuel problem check filter pump pressure let me know alan wrench

Posted on Sep 13, 2009

dttech
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SOURCE: I have a 93 mercury topaz 4cyl 2.3L that stalls

It sounds to me like you replaced everything but the most likely cause of a stall while driving...The crank sensor.

Posted on Oct 11, 2009

  • 1 Answer

SOURCE: 1998 Mercury Grand Marquis GS runs Rough when cold

I have the same problem and can
Not figure it out did u have any luck?

Posted on Oct 17, 2011

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1 Answer

1996 Grand Marquis lets off gas smell through A/C vents after about 10 min with A/C on and more so when idle ???


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1 Answer

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It could be low fuel pressure too.
You may have to have a shop check the sensors with a scanner and the fuel pressure with a gauge.

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96 grand marquis rough idle, lossof power while driving, check engine light flashes


You work on Check Light issues first,so check
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Need some knowledge or a trouble chart,as codes
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Jul 12, 2011 | 1996 Mercury Grand Marquis

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My check engine light is on and the reading is a misfire on cylinder 4 i had the spark plug changed and the coil pack on that cylinder and the car is still doing the same thing so i took it back to the...


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Jan 08, 2010 | 1998 Mercury Grand Marquis

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