1999 Gmc Jimmy

1999 GMC JIMMY
99,000 MILES
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FEZUK
  • MEMBER
  • 2 POSTS
Hello I just bought the jimmy it run good for 2 weeks but one day it start buck really. So o change the gas fitter but it was not that I change the egr valve but was not that but when I unplug the egr value it stop bucking but its the car won't shift into higher gear so Idk if I should change the Catalytic Converter or something
Jan 1, 2012 at 12:11 AM
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FIXITMR
  • ✓ASE Certified Mechanic
  • 9,990 POSTS
  • ASE Certified Mechanic
any codes in computer?
Jan 1, 2012 at 12:14 AM
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FEZUK
  • MEMBER
  • 2 POSTS
P0405 Exhaust Gas Recirculation Sensor A Circuit Low P0406 Exhaust Gas Recirculation Sensor A Circuit High
Jan 1, 2012 at 12:21 AM
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FIXITMR
  • ✓ASE Certified Mechanic
  • 9,990 POSTS
  • ASE Certified Mechanic
codes are erased and have not returned?
Jan 1, 2012 at 4:40 AM
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JOHNS93JIMMY
  • MEMBER
  • 2 POSTS
I have a 93 Jimmy with a 4.3 vortec that is doing the same thing. I cleaned the EGR valve, OCV valve, and the idle air intake control valve and now it rarely shifts into overdrive. Runs a lot better and has more power but it rarely shifts all the way out. How did you fix it?
Feb 27, 2013 at 4:52 PM
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