Just drove a 91 350SDL . Zero to sixty took about 16/18 seconds. Thought these were suppossed to do this in about 12 seconds.
Also, did not seem to have a whole lot of power on a hard pull, going up a hill. Problems with injector pump timing ?
Also has a definite knock at idle, thought it might be a bad injector, goes away once rpm gets above fast idle. Any ideas ?