1996 GMC C1500 engine runs and looses speed

1996 GMC C1500
19,800 MILES • V8 • 2WD • AUTOMATIC
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PLSHM
  • MEMBER
  • 1 POST
My truck acts like it dosen't want to start, but after a few tries it cranks and runs. As i'm driving alone suddenly there is a loss of speed, then the truck stops completely. After i sit there for a few minutes it starts again and runs. I changed the spark plugs,and also the fuel filter underneath the body of the truck. That did not solve my problem. I have been told that it's possible my catalytic converter needs to be replaced. Also the oxygen sensors as well. Where are the oxygen sensors located ?

Thank You
Feb 15, 2009 at 6:54 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Hi
The O2 sensors are on the exhaust. As far as the power problem, check to make sure that the catylatic converter isn't plugged. Listen for a hissing or rattle sound. Have you checked for vacuum leaks? IS the check engine light on? Have you checked for fuel pressure?

Joe
Feb 17, 2009 at 5:22 AM
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