i was hoping to get some advice..i have a 95 tahoe with a tbi 350...started off with the idle shooting up and down where is was pushing the truck at a stop...i checked for vaccum leaks found none...i changed the tps and fixed the up and down issue but now the truck idles at 1500 rpm's...i took out the iac sencor and cleaned it up but no difference...disconnected the battery in hopes of resetting it but same situation...any help would be appreciated