SPONSORED LINKS

Vehicle has misfiring and O2 codes.

Tiny
LYNDON GORDON
  • MEMBER
  • 2004 GMC SAVANA
  • 23,237 MILES
My 2004 GMC Savana V6 3500 VIN# 1GDJG1U141140461, misfire when it warms up. It stifles during acceleration. Small explosions can be heard in the exhaust system when the un-burnt gas ignites, while laboring to accelerate. What can be the problem? Vehicle has misfiring and O2 codes.
SPONSORED LINKS
Tuesday, December 13th, 2011 AT 9:33 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Repair the miss fires first and the o2 code may go away.

I would start with plugs, wires fuel and air filter.

Roy
Was this
answer
helpful?
Yes
No
Tuesday, December 13th, 2011 AT 9:49 PM
Tiny
LYNDON GORDON
  • MEMBER
  • 3 POSTS
Vehicle has new plugs and wires, runs good when cold. It starts to shake when it reaches normal operating temperature. To prevent misfiring I would turn it off at stop lights and restart it when light turns green. If I allow it to idle too long, it will start to misfire and shake.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, December 14th, 2011 AT 2:02 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Other possibles are injectors, vacuum leaks and coil failure.

Roy
Was this
answer
helpful?
Yes
No
Wednesday, December 14th, 2011 AT 2:05 AM

Please login or register to post a reply.

Related Oxygen Sensor Content

Oxygen Sensor
GUIDE
Oxygen Sensor
Oxygen sensors are made of reactive materials which limits their lifespan. Aside from mechanical failures such as shorted heating elements or physical damage, these sensors...

Sponsored links