Question about 1993 Mercury Grand Marquis

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1993 gran marquis hesitates and idles rough with check engine light on

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My car did that and it was the vacumn hose had a hole in it after it was replaced the car ran fine

Posted on Jan 17, 2010

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Get code checked at autozone or advanced auto for free. Probably 02 or egr sensor

Posted on Jul 20, 2009

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1 Answer

2000 Merc gran Marquis randomly engine slows almost to an idle while driving t/c & abs fuse is out I have checked fuel pressure exhaust back pressure on can the t/c be causing this ?


Check engine light on ? Any DTC'S - diagnostic trouble codes ? With the Traction control and ABS fuse in are the ABS ,T/C light on . Check Codes ?

Jan 18, 2017 | Cars & Trucks

1 Answer

Rough idle,hesitation and no check engine light or codes


Sounds like you have a misfire, that causes the ck engioje light to flash.

Jan 13, 2014 | Cars & Trucks

1 Answer

I was driving our 2003 Mercury Gran Marquis in town. The engine died two different times when pulling up to stop signs after a complete stop. The temp. outside was around 94 degrees. The car started back...


Fuel Pump may have seized mechanically or failed
electrically

The Idle Air Solenoid ,if you have one may need to
be cleaned or replaced

Still need to check the entire car from the most basic
things to the ones requiring professional tools

You have to actually look for problems

The EGR Valve or associated items may be failing

I would be willing to bet the front O2 Sensors have 100,000
miles & never been changed

How about the gas filter,changed every 3 years

Spark plugs every 3 years

Battery about to die

Bad COP Ignition Coils spiking the pcm & put it down

Any Check Lights on the dash?

Any stored codes,not generic,manufacture-- only
seen by a professional scanner

Sep 12, 2012 | 2003 Mercury Grand Marquis

1 Answer

My 1993 mercury grand marquis has a vacuum leak between back of engine and firewall. the pvc has been changed, all plugs and plugs wires were changed. it idles very rough at stop lights and now after a...


it sounds like you may have 2 problems.
1st vacuum leaks are fairly easy to find if they change idle/accelleration,alot of times you can hear
it,the use of carberator cleaner spraying different vac hoses & gaskets while engine idles to see a difference in the way the engine idles(goes up/ down in rpm's)or using a unlit propane torch.if its a very tiny vac leak then a smoke test can be done.
your hunting to find rev/drive maybe a worn switch or linkage

Jul 16, 2011 | 1993 Mercury Grand Marquis

1 Answer

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


You work on Check Light issues first,so check
for codes & proceed from there.

Need some knowledge or a trouble chart,as codes
don't tell you what is wrong or what to replace

Jul 12, 2011 | 1996 Mercury Grand Marquis

1 Answer

I have a 2005 Gran Marquis 4.6 Engine Engine has defaulted to limp home operation Codes 2107 and 2110 are present car is running but wont accelerate and is running rough


Throttle problems. I would recommend the dealer or a shop that does FORD repairs and has the proper equipment to diagnose and repair this problem.

Nov 12, 2010 | 2005 Mercury Grand Marquis

2 Answers

Merc Grand Marquis, starts, idles rough for few seconds and dies.


HI if you rev up the rpms does your light stays on ,If thats the case you need to replace your alternator have it check at autozone or rally s auto parts for free

Sep 25, 2009 | 1993 Mercury Grand Marquis

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