Mechanics

HOW CAN I FIX MY CAR THAT CANNOT MAINTAIN SPEED WHEN IT REACH 2100 RPM.

1991 Mercury Capri • 167,000 miles

I have to floor the gas to escape the hiccups and then let's say at 70 mph it will start to lose speed. I constantly step on the accelator to keep up with the flow of traffic. Otherwise, if I let the speed to come down, it start********. Beyond 2100 rpm, it is okay.
Please help as I already change mostly everything like Air Mass Flow sensor, spark plugs, wires. Fuel pump, fuel injectors, ignition coil, air filter and fuel filter.
Avatar
CapriRaf
August 25, 2011.




Do you have a check engine light?

Could be caused by one of the following 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.
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.

Tiny
Rasmataz
Aug 25, 2011.


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