1989 Pontiac Firebird losing power under load

Tiny
RICHARD KUEHL
  • MEMBER
  • 1989 PONTIAC FIREBIRD
  • V8
  • 2WD
  • MANUAL
  • 130,000 MILES
Car takes off normal and shortly after take off it loses power under a load, This problem started right after bump starting it in reverse
Sunday, April 11th, 2010 AT 3:50 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Inspect and test all the following listed below:

Oxygen sensor
Catalytic converter
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)
Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Cap and rotor

Note: If it doesn't apply disregard.
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Sunday, April 11th, 2010 AT 3:59 PM

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