'94 GMC Jimmy SLE
recently acquired and i am mainly having to work on external engine parts and alot of original part replacement, alot of the hard work has been complete but as usual alot of the original parts need updated or replaced. anyhow ...
my idle recently jumped as if my timing is changed. i do not have a tachometer but seems that the truck idles up to about 3500rpm,i have been told it was the TPS. is there a way to check this. i havent even seen if i have one but was told the first thing i would need to do i buy a OBD1 test kit and go from there... any remarks or words of wisdom ?