Check engine light.
10

Asked by Spunkman Mar 01, 2015 at 11:26 AM about the 1994 Mercury Tracer LTS Sedan FWD

Question type: Maintenance & Repair

My check engine light comes on shortly after starting. It runs a little rough when on but if it goes off, car runs much smoother. When at a stop light or stop sigh, initial take off must be slow or engine will quit. Runs normal if light is not on.

4 Answers
101,545

KenF answered 9 years ago

Take it to one of the auto parts stores that do the free OBD scan, they'll let you know what the trouble code is.

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Jeremy answered 9 years ago

Same happened with mine. Trouble code p0171 or p0174

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Spunkman answered 9 years ago

Took car to Autozone. They said car is too old to check with scanner they have. Can you tell me what p0171 and p1074 is? Car is 1994

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Jeremy answered 9 years ago

When i scanned mine it said "running to lean" which means the engine isint getting enough gas. The problem can be the fuel filter or fuel pump. I would start with the filter because there cheaper. If its the pump they will have to drop the fuel tank to get to it which could cost a couple hundred in labor but the pump is only about $75 on autopartswarehouse.com. If neither one of those works just search google for OBD2 code p0171 or p0174

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