Join Date: Mar 2002
Location: Austin, TX, USA
Re: Staling and starting problems
I'm not an advocate of swapping parts to fix problems, but it sounds like your throttle position sensor could be wearing thin in spots. Get a digital ohm meter and connect it between the center pin on the TPS and one of the outer pins. Manually sweep the throttle by hand and watch for smooth changes in resistance. If you see any 'holes' where the resistance changes abruptly, replace the TPS. If that checks out, give the wiring harness and the connector pins a good looking over for signs of pinched wires or connector pins that are sprung open or have a file of oxidation on them.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI