Charlie -

I have a similar issue with the TPS. The TPS has 4 pins and the MS wiring diagram shows only 3 wires.... ground, Vref and TPS signal.

The Mitsu manual says pin #1 is ground and pin #4 is sensor power.

When I connect an ohmmeter to pins #1 & #3, I get the smooth increase in resistance, so I assume pin #3 is the variable TPS signal to MS.

Does this look correct?:

pin #1 = ground
pin #2 = Vref
pin #3 = TPS signal
pin #4 = 12v+ switched

Or is one pin unused?

Frank

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum