1999 Ford Mustang

PENNINGTONGAPVA

MEMBER
1999 FORD MUSTANG
6 CYL
2WD
AUTOMATIC
17,000 MILES

I have a 99 ford mustang and sometimes the service engine light comes on and stays on cpl of days then it goes off. When the service light comes on seems light my mustang to me it seems like it dont pick up speed like it does when the light isnt on. Ice had it checked with that comp device and the local auto store and it said a censor anyway I changed it from under the hood and the service light still comes on. Any ideas why it still comes on or why it seems not to run right when its on. Thank you

Friday, July 16th, 2010 AT 7:00 PM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Lack of acceleration, chugging, hesitating, bogging etc. Could be caused by one of the following below:

Possibilities: Inspect and test all the following listed below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it.

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Friday, July 16th, 2010 AT 7:32 PM