2000 Chevy Astro takes long time to get to 35 mph or 45 mph

ABOOISCOOL

MEMBER
2000 CHEVROLET ASTRO
6 CYL
AWD
AUTOMATIC
130,000 MILES

Takes off ok but then like boggs down and will not acelerate right. Tops off about 50 mph. I can push gas pedal to floor and nothing, dont even hear engine rev up with gas pedal floored. In park engine revs up fine. Replaced fuel pump 6 months ago. Replaced fuel filter, spark plugs, spark plug wires, changed out transmission fluid and filter, and put in the $20 can of gas treatment from dealership in gas. I did all that in the last week. Still not much inprovment. Any help would be great. Thanks

Tuesday, July 27th, 2010 AT 4:53 PM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Lack of acceleration, chugging, hesitating, bogging etc. Could be caused by one of the following below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it

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Tuesday, July 27th, 2010 AT 5:06 PM