1989 Isuzu Truck engine

Tiny
DAVID LYNN
  • MEMBER
  • 1989 ISUZU TRUCK
  • 4 CYL
  • 2WD
  • MANUAL
  • 110,000 MILES
Engine completely cuts out when acceleratting after 65mph aready have changed fuel filter why
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Wednesday, July 29th, 2009 AT 2:01 PM

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Tiny
2CIXPT
  • MEMBER
Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires
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Wednesday, July 29th, 2009 AT 2:10 PM

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