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1996 Geo Sputter at high speeds

Tiny
JENBE1521
  • MEMBER
  • 1996 GEO PRIZM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 178,000 MILES
I have a 1996 Geo Prizm. About a week ago, it started to sputter (seems like it is not getting gas?) When I would reach 70-75mph on the highway. It didn't always do it and it does not a low speeds. Then today it wouldn't let me go over 65mph, let alone 60. I have changed my BWD distributor cap, PCV valve, Distributor rotor, Spark plugs and wires. I have tried Seafoam, and nothing seems to be helping. Pressure? Fuel filter? Pump? No check engine light or anything? Please Help! Thanks so much, Jennifer
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Friday, July 15th, 2011 AT 11:49 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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.
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Friday, July 15th, 2011 AT 11:51 PM

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