2003 Chevy S-10 hesitates on cold

2003 CHEVROLET S-10
66,000 MILES • 6 CYL • 4WD • AUTOMATIC
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HOTSHOE2J
  • MEMBER
  • 1 POST
on first sart in the morning my engine stubles at part throttle, after it heats up, it runs fine. I have replaced the plugs, wires cap and rotor. fuel pressure regulator and throttle position sensor. Im not getting any codes when I scan it.
May 18, 2010 at 5:35 PM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Inspect and test all the following listed below and get back with some results

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position 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.
May 19, 2010 at 1:04 AM
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