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2003 Chevy S-10 hesitates on cold

Tiny
HOTSHOE2J
  • MEMBER
  • 2003 CHEVROLET S-10
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 66,000 MILES
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.
Tuesday, May 18th, 2010 AT 5:35 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 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.
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Wednesday, May 19th, 2010 AT 1:04 AM

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