2000 Oldsmobile Silhouette Hesitating as it accelerates


Engine Performance problem
2000 Oldsmobile Silhouette 6 cyl Front Wheel Drive Automatic

My 2000 oldsmobile silhouetter acts like it is hesitating as I give it gas going down the road. I can hear what sounds like a whistle if I give it more gas to see if it will straighten up. My RPMs jump up and down as it is doing a jerking motion like it wants to go but wants to quit. Sometimes I hear it back firing. If I let off the gas a bit sometimes it corrects itself and runs good. Can someone please tell me what I should do first maybe step by step so I can get this fixed. This just started Aug. 4, 2009 right after I filled up my vehicle with gas to go on vacation. I want to keep my vehicle running. Thanks in advance.

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Friday, August 28th, 2009 AT 8:11 PM

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2000 Oldsmobile Silhouette Hesitating as it accelerates

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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Friday, August 28th, 2009 AT 8:16 PM

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