2004 Lincoln LS Check Engine light

JEREMYHOLCOMBE

MEMBER
2004 LINCOLN LS
6 CYL
2WD
AUTOMATIC
80,000 MILES

My check engine light went on yesterday. When I got the car home I popped the hood and listened to the engine idle and it seemed quit comparably to before. The next morning I started it back up and hit the gas. The rpms have always only gone up to 3000rpms but when I did this it made light popping noises like some sort of misfire. I recently have replaced cylinder coils 4 of 6, a crank sensor, and repaired a few oil leaks. I also had my ac charged recently but it seems to be malfunctioning and don't know if that has anything to do with this, sometimes cold sometimes heat. Any idea what this may be?

Thursday, August 26th, 2010 AT 12:53 PM

1 Reply

WRENCHTECH

MECHANIC
20,761 POSTS

The "check engine" light is an indicator for a system that monitors many electronic functions in the system, also called the "malfunction indicator lamp" (MIL). It can come on for any of hundreds of different causes from any of the systems that the computer monitors. Some are very important and can lead to further component or engine damage and some are emissions related not as serious but still a problem and need to be repaired.

Your first step is to have the computer scanned to retrieve the trouble codes that were set when the check engine light came on. Those codes will give you specific information about what the computer saw and will get you pointed in the right direction to find your problem. With a 1996 or newer and some 95 cars and you have an AutoZone or Advanced auto parts in your area, they will read them for free. Once you have these code numbers, we can be a lot more specific about what your problem may be.

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Thursday, August 26th, 2010 AT 1:15 PM