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Message: <blockquote data-quote="Werecow" data-source="post: 1457974" data-attributes="member: 24286"><p>Just my $0.02 on this one.. in doing the troubleshooting steps for this issue on the 94 5.0 I'm working on now, when I got it, it had the same surging issue some of you have battles here. I found one of the vacuum lines under the upper intake manifold plenum was completely disconnected. I couldn't get to it to put a plug on it without taking it off so I used a hose which worked out well because then I had somewhere to hook up a vacuum gauge. It still acted like it had a leak somewhere else, and when I took the IAC valve off to clean it, not only was the gasket in pieces but the body had a crack in it as well. So right there was not only an external vacuum leak, but the IAC valve couldn't do its job because of the leak inside of it.. so all the adjustment in the world was useless on it because of an internal crack. Lesson here.. just cause it still looks pretty don't mean it's doing its job... And as several ppl have pointed out here before vacuum leaks can be the easiest and the hardest things to miss.. look in YouTube for smoke chimneys if you wanna find vacuum leaks that you can't seem to track down.. O2 sensors are another thing that can throw off everything..  I know mine are bad still but that's why mine's running pig fat right now. And as far as the one that was dying when you turned the steering wheel? If I remember isn't there a pressure sensor in the steering system somehow that will work with the computer that's supposed to adjust the throttle when the the steering system needs more input from the engine? I seem to remember part of the testing thing when you hook up a code reader that turning the steering wheel is part of getting some series of tests done? I may be waaaaaaaaayyyy out in left field on this, if I am call me an idiot.. anyhooo... That's my $0.02  cheers mates!!</p></blockquote><p></p>