GMC Safari Problem

[Rebelyell]

I have a 89 Gmc Safari with a 4.3 L - I have a stumble when I take off almost a stall sometimes, have had mechanics work on it, Egr Valve changed. Checked on computer no codes showing. Have spent 700 on the darn thing.
Any Ideas? !!!!!

What is a Type Fe3 Olds cutlass 1985?

[Danmuzicman]

its an olds 442, here is the options code for each year leading up to 1991
http://www.442.com/oldsfaq/of442.htm#442%201985


Do you have any intake or exhuast leak, or you could be loosing compression in a cylinder, i have noticed this same problem in older gm motors. its usualy an IAC or a PCV valve. the egr just goes bad, those two can get sticky and not throw codes, and they have no sensors, they only control air and idle. to me, with only what you told me sounds like an idle air controler