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1990 Oldsmobile Delta 88 why car won't accelerate when engi

Tiny
EDDYCANE
  • MEMBER
  • 1990 OLDSMOBILE DELTA 88
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 107,000 MILES
I have a Oldsmobile Delta 88 royale and the car will accelarate when cold but when engine warms up it won`t accelerate and goes into closed loop. By the way, the car has a new set of heads on it already. What do you think the problem may be?
Monday, November 16th, 2009 AT 6:15 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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)

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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Monday, November 16th, 2009 AT 8:11 PM

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