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FEZUK

MEMBER
1999 GMC JIMMY
99,000 MILES

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

4 Replies

FIXITMR

MECHANIC
9,990 POSTS

Any codes in computer?

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Sunday, January 1st, 2012 AT 12:14 AM

FEZUK

MEMBER
2 POSTS

P0405 Exhaust Gas Recirculation Sensor A Circuit Low P0406 Exhaust Gas Recirculation Sensor A Circuit High

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Sunday, January 1st, 2012 AT 12:21 AM

FIXITMR

MECHANIC
9,990 POSTS

Codes are erased and have not returned?

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Sunday, January 1st, 2012 AT 4:40 AM

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?

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Wednesday, February 27th, 2013 AT 4:52 PM