1994 GMC C1500 Engine surging

1994 GMC C1500
300,000 MILES • V8 • 2WD • AUTOMATIC
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DBANKS12
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  • 5 POSTS
Hi I have a 94 GMC Silverado with a 5.7 Litre in it. I was driving it last week and when I went up a hill I lost power. I pulled over and it was surging even at idle, my dreaded check engine light was on. I have a code reader and when I got it home found a 44 o2 sensor. I have since replaced the sensor and changed a fuel filter for good measure. Started it up and it ran at idle but when I put it in gear it dies and is surging again. I took my air cleaner and clearance ring off the throttle body and both injectors are spraying evenly even when it dies out. Now the o2 sensor code is back, I checked it over and it only has one o2 sensor in it. Any help would be appreciated
Jun 29, 2009 at 10:53 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Have you checked if the catylatic converter is plugging?
Jul 1, 2009 at 9:16 PM
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DBANKS12
  • MEMBER
  • 5 POSTS
It was removed by the previous owner and a new exhaust put on 15,000 km ago clear as a whistle.
Jul 1, 2009 at 9:34 PM
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