Questions & Answers for: Mercury runs rough

...rough at low and mid range speeds. If I punch it or get to about 80 mph it smooths out and runs like it should. A fuel injector stuck open and the computer went bad at the same time. Caused a lot of ...

Rough running and engine light is on. Sounds Rough running and engine light is on. Sounds choked up like it has to cough it out. try replacing the sparkplugs. u must be flooding fuel that needs to be ...

...,hard to startrun rough engine stalls ,hard to start ,runs rough Service Engine light came on and stays on and this is on my 1995 Grand Marquis LS 4.6 litre Engine. It is now idling a little ...

mercury mountineer running fine then started running rough have 99 mercury mountineer running fine.. stopped at store got back in started running rough... idles fine just replaced spark plugs and ...

...problem it will turn over ,start sometimes runs rough and sometimes just spins. fuel presure? ignition coil? probably the distributor. $200 on ebay.

...runs rough and then eventually runs rough and stalls. The car starts back up and goes through the same routine. After driving and stopping at a red light for example, the car runs smoothly for a few ...

check engine flashing running rough check engine light flashing and engine running rough the light is flashing from a misfire have it scanned and the codes will lead you to the bad cylinder 

...runs rough the engine runs rough, what are some possible explanations? Have you checked spark plugs, wires, or distributor/coil pack. If its not that possible maf or map sensor or a clogged fuel ...

runs rough and codes are runs too lean. Once it warms up runs great. 04 Mercury Monterey Van runs rough and check engine light flashes when first runs in morning. Once it gets warmed up runs fine rest

engine runs rough Ran perfect when winterized last fall. Started right up this week but runs Rough. Added new gas and stableliser. Tank had 1/3 gas when put away last fall. Have you replaced the plugs