Originally Posted By poorboy
Its got new plugs, plug wires, cap & rotor, and a new air filter, right? lots of people want to jump in on the hard stuff when the problem is often the basic stuff ignored. Gene
Yup all new, I have a 91 also with a 360 and am thinking of taking the throttle body and trying it on the 89.I just don't get why it idles up and down till its warm. As soon as the temps got in the 40s it stated acting up. I bought the truck this summer so I am sure the issue was there already.