Originally Posted by Warlock III
I'd replace the IAC...After you reset the computer and let it relearn. I have a '95 5.2 5 speed manual trans. AND for some reason every time I do the K3 code check it runs exactly as you stated yours does. Relearn the ECM and it runs perfect. K3, runs like crap until I reset it.
Unhook the positive side of the battery. Cycle the key to start once to do a complete pwser drain and re-hook the positive cable. If it still idles low (and pops in the exhaust) after you do that, I's replace the IAC ($45).
What do you mean K3 code check? The CEL is not on so I haven't put my scanner on it. Tomorrow I'll probably pick up an IAC but I'd hate to keep replacing parts that are fine. I also replaced the crank position sensor when the truck broke down.
As far as the EGR valve the problem seems intermittent, wouldn't it run like crap all the time. I would think there would be more signs of this. It does seem to have been using more fuel but it doesn't run any hotter even on 90 degree days with the air on. When the engine decides its going to actually run at idle (as stated above it will drop to 0 then rise to around 500 RPMs) it does idle rough and when accelerated weather under load or not it sputters a little but seems to run smoothly at higher RPMs.