Best Answer

Did u try spark plugs/wires, air filter, and if not that try going to a mechanic get the fuel injectors cleaned Check vacuum lines for a leak? Scan for trouble codes?

User Avatar

Wiki User

โˆ™ 2009-05-23 14:24:46
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: 1993 mercury marquis runs rough on startup but after awhile it goes away?
Write your answer...
Related questions

How do you repair a 2001 mercury grand marquis that idles very rough only after the first start after sitting a couple of days?

I noticed rough idle on a 2001 MGM and what seemed like transmission slip while going uphill. I replaced the spark plugs. Both problems went away.

Why does 99 mercury grand marquis run rough check engine light on?

The check engine light indicates that the computer has detected a "fault". Use a code scanner to find out what the computer has detected, that is PROBABLY the reason the engine is running poorly.

Does Mercury have a rough surface?

Mercury is made up primarily of rock,helium,hydrogen,dust,dirt, and ice.

Could a rough road cause a fuel cut off switc to cut out on a 1998 grand marquis?

a rough road can cause the fuel shut off switch to turn off

How do you correct a rough ride on a 1996 grand marquis with rear air ride shocks?

Replace the shocks, or struts if equipped.

2002 Mercury Sable idle rough when the ac is on?

check fuse 22

Which type of PFD offers the best protection when you are boating in rough waters where rescue may take awhile?

Type I offshore life jacket

Will 22 inch rims fit a 1995 Mercury Grand Marquis if elevated?


Why would a 1998 Mercury Sable stall and idle rough?

check pcv hose elbow for vacuum leak.

Will 24 inch rims fit on a 1995 Mercury Grand Marquis?

i have a 95 marquis and have a perfect answer. since the ride of a grand marquis is "floaty", unless u get a rim and tire wit an appropiate offset and atleast 9 inches wide or less, your fender will hit the actual tire while going down the road and cause a blow out. i know cause i had sum put on mine without a lift and they blew my front driver tire. some Chevy truck springs were put onto the front and air shocks wit 2 spring separaters a piece on each spring in the rear was what was used on my car and my car cannot compress the springs enough at all to blow a tire. not too rough on the front because a marquis weighs more than a crown Victoria so don't let people wit vics tell u they gunna ride rough and not compress at all. i got about 2 to 4 inches of actual compression so its rough? but not bad enough to make me stop drivin it. the back on the other hand is very rough. also btw i have a 275/25/24 tire so tats where alot of the roughness come from.

Did Freddie Mercury smoke?

Yes he did. He was actually a chain smoker. That's why his voice started to rough up in the 80's

Is mercury's surface smooth or cratered?

its rough because it looks like the moon only mercury is gray instead of white/yellow

Why would 93 mercury cougar runs rough missing?

Need a little more information. there are a number of reasons why your cougar would run rough. Anywhere from the mass oxygen sensor to the idle control sensor, oxygen sensors and on and on.

Why isn't the Earths created like the moon and Mercury?

because of volcanic action, erosion and and tectonic plates grinding agaist each other it makes the Earth rocky and rough, but not making it cratered like the moon and mercury.

1993 mercury villager runs rough when check engine light comes on codes 34 51?

If the 1993 Mercury Villager runs rough when the check engine light comes on and the code reader says 34 and 51, there is a problem with an oxygen sensor and the MAP (Manifold Absolute Pressure) sensor. Both parts together will cost around $200.

I have a 2003 Mercury 115 that runs rough at low rpm help?

A 2003 Mercury 115 that runs rough at a low rpm might be having a problem with the MAP Sensor or the Oxygen Sensor. The MAP Sensor is going to be the easiest one to replace because it is usually located plugged into the EFI (Electronic Fuel Injector), a fancy would for carburetor.

On 1998 GMC 350 Sierra K1500 Idles rough but runs great otherwise Any suggestions?

I'd start with a basic tuneup if it has not been done in awhile. Then I'd clean the fuel injectors.

2002 Mercury Villager brake light lights up on rough roads.?

Brake light switch needs adjusting or replacing. It is too sensitive.

What causes 2000 Nissan Altima to have rough startup and strong gas odor?

Most likely a fuel leak or sticking injector. Try injector cleaner first to see if it helps. It probably won't but it's worth a try.

1992 mercury It runs rough when idlingAt 25-35mph It runs really rough Like a herky jerky feeling Then it settles Until you get up to about 50-55mph It starts running rough again What?

dear people of the us rough can be a behavior or u can feel i I will tell u the behavior first then the feeling then the feeling. The behavior rough means like playing a little to rowdy and mean. when to little boys r having a wrestling match they may be a little bit rough so u will tell them to stop hurting each other and being rough and rowdy. The feeling rough feels hard and bumpy like sand paper or u could say a car ride was rough because the road was rough and bumpy definitly rough is the oppisit of smoth

What are the problems with 115 hp Mercury outboards?

Starts hard then it rough idles for a short time then smooths out but when you give it gas it miss fires and bucks and does not smooth out.

Why would an 81 Lincoln run fine then when stopping for a light run rough and stall if cleaning the complete system with pro cleaner seemed to fix it for awhile but then it did it again?

change air and fuel filter, plugs and wires

What could cause a rough idle on a 2000 mercury cougar when in drive?

I just changed fuel filter,pump,sparks plugs and wires on mine and it runs great!

What causes rough endoplasmic reticulcum to look ''rough'' under a microscope?

Ribosomes are embeded in rough ER.That makes it rough.

What planet has the longest day sunrise to sunrise?

The planet is Mercury. The definition of "day" that is important here is the "solar day"."Sunrise to sunrise" is a rough definition of the solar day. Mercury has thelongest solar day. It's much longer than the Venus solar day, even thoughVenus takes much longer to rotate than Mercury.