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1998 Chevy Cheyenne bucks

Tiny
MLAROBARDI
  • MEMBER
  • 1998 CHEVROLET CHEYENNE
  • 6 CYL
  • 2WD
  • MANUAL
  • 233,000 MILES
My truck bucks sporadically for the first 30 minutes I drive it. It was doing the same thing last year, I replaced the spark plugs/plug wires and the problem was fixed. Could the spark plugs and/or wires go bad in a year?
Wednesday, June 9th, 2010 AT 7:26 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi mlarobardi, welcome to 2carpros and TY for the donation

Might want to check the condition of the plugs could be fouling. Also the following could also cause your problem.

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, June 9th, 2010 AT 7:32 AM

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