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1988 Buick Reatta SLIGHT ROUGHNESS IN ACCELERATION THROUGH

Tiny
DGOODMAN
  • MEMBER
  • 1988 BUICK REATTA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 110,000 MILES
SLIGHT ROUGHNESS, (FEELS LIKE MISSING), THROUGH FIRST GEAR IN THE AUTOMATIC TRANSMISSION/ACCELERATION; NOT EVIDENT THROUGHOUT THE REST OF THE RANGE WHILE ACCELERATING. NEW PLUGS, WIRES. WHAT SHOULD I BE LOOKING AT IN SEQUENCE?
Thursday, October 15th, 2009 AT 2:32 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Transmission could be slipping and engine needing tune-up and the following below

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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Thursday, October 15th, 2009 AT 3:18 PM

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