Mechanics

TRUCK LAGS

1993 Ford F-150 • 6 cylinder 2WD Manual • 191,000 miles

1993 ford f150 4.9L - Lags when accelerating.I step on the gas and it slowly starts to accelerate then finally after a second or two starts to pick up speed. It also jumps and****** on occasion when I am taking off from stopped. I am thinking exhaust system?
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Bborchers
February 14, 2011.



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.

Rasmataz
Feb 14, 2011.
Will begin tomorrow. Lol. Thanks razmataz

Tiny
Bborchers
Feb 15, 2011.