2003 Saturn Vue Shakes/Hesitates when driving in hot weathe

2003 SATURN VUE
87,300 MILES • 4 CYL • FWD • AUTOMATIC
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KRISTIEDJ
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  • 1 POST
My car has been shaking or hesitating (not stalling) on my way home from work in the afternoon. It appears to only do this when the temperature outside is above 90. On the way to work in the morning (when its cooler outside) it runs fine. It only does this when I accelerate and happens at any speed. At idle it runs just fine. If the car starts shaking and I take my foot off the gas it stops shaking right away and idles fine.
Aug 13, 2010 at 9:47 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Lack of acceleration,chugging,hesitating,bogging,misfiring 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.
Aug 13, 2010 at 11:20 PM
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