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1991 Dodge Spirit 1991 Dodge Spirit acceleration

Tiny
XLT236
  • MEMBER
  • 1991 DODGE SPIRIT
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 188,000 MILES
When the engine is cold it will run and accelerate fine. When the car heats up to normal temp it won't accelerate past 30 mph. When I step on the pedal to accelerate over 30 mph the car sounds like it is going to stall but when I let off the gas it will run and slowly move above 30mph
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Thursday, July 23rd, 2009 AT 7:20 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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
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Thursday, July 23rd, 2009 AT 10:42 PM

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