That's a good idea 91Monty. Let's you take the ISC out of the equation just to make sure. I did it, and it still idles at 1200 with the pintle extended out all the way manually.

Replaced the distributor and noise filter and no change.

I'll have to think about this some more.

1990 Monty LS 3.0 A/T LWB. KYB front shocks, OME rears and coils. 33x10.5 BFG Muds. 5.29, 2.85, RD110, RD46. 2 bouncys. Aisins. Monte Disco swaybar disconnects. GenII t-arms, idler arm, UCA's, V45W front brakes. 2in BL.