Try jumping the connector, loosen the TPS, and allow it to snap back with the spring's tension. If the idle drops, it is working. Rotate it slowly back to the start point, stopping when the idle raises up. Back it off a hair until the idle drops again, and tighten it down. Then you know you will be able to set your timing, and the TPS is going to be about 98% correctly set. Anything better requires a multimeter, a steady hand and some practice.

"A young man who does not have what it takes to perform military service is not likely to have what it takes to make a living." - John F. Kennedy

Proud owner of an 88 Montero (with a blown engine).