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What would cause poor or no acceleration?

Tiny
PRECIOUS
  • MEMBER
  • 1993 LINCOLN MARK VIII
  • 123,000 MILES
Car starts, rough idol but when you press the accelerator, car's RPM do not go up what would cause this? Have new idol control valve, cleaned the injectors, new PCV, new saftey switch. There was an issue with a stuck accelerator cable.
Sunday, November 6th, 2011 AT 1:08 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you have a check engine light and when was last tune-up??

Refer to this link for additional information:could be caused by one of the following below

https://www.2carpros.com/articles/engine-hesitates

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.

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 and keep testing.
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Sunday, November 6th, 2011 AT 5:26 PM

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