Mechanics

SPUTTERING

1993 Lexus LS 400 • V8 2WD Automatic • 198,000 miles

My car a 1993 Lexus LS 400 sputters badly while running and seems like it will shut off, its also really burning a lot of gas. I've put fuel injector cleaner in it several times. What is causing this and how can I fix it?
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AL Pena
April 3, 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
Apr 3, 2011.