I was kneeling on the bumper and holding the throttle lever open a little to raise rpm's a little, when I experienced a tingling, like when you put a 0 volt battery on your tongue to see if it's good. So I grabbed the DVM and held the red end on throttle lever and black against ground strap and watched it go from 13. 4 to 8.x to 4.x to nothing and then repeated this a few times. and then it just read zero. Any idea why there would be voltage at the throttle lever? I tried to duplicate again and got like .5 volt. This is weird.

 

Short somewhere? Shouldn't be any voltage there at all. IAC is the only thing that actually gets battery voltage near the throttle body. (and the injectors... but, they are isolated from everything....)

 

Haven't had time to check it out again. I doubt it has anything to do with the slight misfires it's been having. Been reading on some other forums where they are talking about running ground wires to the throttle bodies. Haven't figured out what the benefits are to be expected.

 

IAC and TPS both have electrical connectors on TB.
see if you get the same electrical test with ignition on, but engine not running, and if so, then try unplugging each of those connectors one at a time.

 

TPS should only be five volts though.