Question about 1999 Mercury Grand Marquis

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The engine misses I was told it was a coil . - 1999 Mercury Grand Marquis

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They usually cause a miss on these. It has eight of them. Do you have a check engine light on?

Posted on Jul 31, 2010

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Posted on Jan 02, 2017

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Changed the plugs wires and coil for #2& #3 cylinder as was told by my odb codes, but the engine is still missing and it did not seem to help can you help me please


The code won't usually tell you what to replace. If a misfire on a particular cylinder, check fuel--spark-- compression on that cylinder. If problem with ignition coil, I'd check wiring circuits for coil, first.
I don't know your year--make--model? My database will only cover vehicles sold in the US.

Given the vehicle a tune-up if it hasn't had one in a while is always a good idea.

Oct 22, 2016 | Cars & Trucks

1 Answer

2004 Ford Escape engine missfire


that sounds like those cylinders injectors might be the problem . When an injector over fuels or fails to supply fuel it would create a misfire just like if a plug or coil failed

Aug 01, 2016 | 2004 Ford Escape

1 Answer

At idle miss firing on cyl 1 3 5


Check connectors for injectors and plug coils. The read out would have told you what injector or plug was faulty. Come back with the code numbers.

May 04, 2013 | Ford Cars & Trucks

1 Answer

Coil grounding on it;s self 94 k1500


that should be HEI so the coil is under the cap. so how can you see it arc its probably a wire arcing replace them

Feb 11, 2013 | 1994 Chevrolet K1500

1 Answer

My car misses


Is there any engine light on?

Feb 03, 2013 | 1992 Plymouth Acclaim

1 Answer

My 2002 envoy has a miss that just started==was driving on the freeway for about 40 miles @70 pulled n a station to get a drink ==started it back up and it started missing like a dead plug or coil i...


2002 Envoy sle 4.2 L straight 6. Random misfire(PO300). After erasing codes for several days, I finally took my car on the highway and ran it at high speed(70+) for about 4 to 5 miles. Check engine light came on as before but this time it gave me(PO305). Random misfire cylinder 5. So I switched coil 5 with coil 2. Went back out on the highway and repeated as before. This time it gave me(PO302). This was telling me I had a bad coil. Replacing one coil pack solved the problem. The professionals told me low fuel pressure would not give me random misfire, but rather a O2 code because the engine is running lean. Thank you------------------------------------ thank you very much.

Jun 26, 2012 | 2002 GMC Envoy

2 Answers

I have a problem with Ford Escape stalling or running rough @ idle everytime it rains. was told it could be catalytic converter.


LEAKING BAD SPARK WIRES OR YOUR COIL PACK GETTING DAMP.IF YOU HAVE 3.0L ENGINE. COIL PACK ON BACK OF ENGINE.IF YOUR LOWER COWL SEAL IS MISSING WATER CAN RUN DOWN THE COWL WHERE SEAL SUPPOSE TO BE CAUSING WATER TO RUN BACK OF ENGINE DAMPING YOUR COIL AND WIRES.BAD PLUG WIRES WILL CAUSE PROBLEM WHEN IT RAINS.

Jan 24, 2010 | 2002 Ford Escape

2 Answers

Engine misses when accelerating


Did you put plug wires on it? Also these are good for having injector problems.

May 24, 2009 | 1993 Ford Mustang

2 Answers

Missing in cylinders 1 and 4


first change the plugs and wires for these two cylinders then if that doesn't help do a compression test or do the compression test first

Feb 09, 2009 | 1989 Oldsmobile Cutlass Ciera

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