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1999 Nissan Pulsar Surging and power loss.

Tiny
TEREN
  • MEMBER
  • 1999 NISSAN PULSAR
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
After50 miles vehicle loses power then surges weaker and weaker until engine stops, after a short stop she fires and seems ok then the same things happens, always under load. She idles fine, eventually needed a tow, this was after I bypassed fuel filter( it wasn't that)
Roadside repair guy thinks it might be fuel pump or possibly the coil, now the auto mechanic tells me he can't find a problem, now I know there IS a problem and sure as hell the same things going to happen when I attempt to drive home over 50 miles away.

Appreciate your input. T
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Monday, November 1st, 2010 AT 1:25 AM

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.
False air leakage.
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
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Monday, November 1st, 2010 AT 9:55 AM

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