1998 Lincoln Town Car surge

1998 LINCOLN TOWN CAR
199,000 MILES • V8 • 2WD • AUTOMATIC
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DAVE BOY
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  • 1 POST
hi i have a 98 lincoln towncar and when the engine warms up it has a surge around 30-40 mph i replace spark plugs all coils and boots fuel and air filter cleaned the whole throtle body even took it to a repair shop, no lights are on and also cleaned the maf sensor but did not replace, i think it's a trans problem i read that these trans on the 4.6 motors have a oss sensor that goes bad can some one please help so i won't pull the little bit of hair i have out?


o forgot to mention runs like a top at idle
Jul 4, 2010 at 5:51 PM
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RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS
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
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
Jul 5, 2010 at 3:15 AM