Mechanics

SLIGHT ROUGHNESS IN ACCELERATION THROUGH

1988 Buick Reatta

Engine Performance problem
1988 Buick Reatta 6 cyl Two Wheel Drive Automatic 110000 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?
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Dgoodman
October 15, 2009.




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

Rasmataz
Oct 15, 2009.


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