loss of power

1991 NISSAN TRUCK
350,000 MILES • 4 CYL • 2WD • AUTOMATIC
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CHRISIRWS
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  • 1 POST
1991 Nissan pick up 4 cylinder. starts with no problem, but when it gets close to being operating temperature, she loses power, not respond well..
changed fuel filter, checked all hoses..
Feb 18, 2011 at 7:59 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
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
Feb 18, 2011 at 8:08 PM
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