TBI Problems

Engine Starts fine, and the idle is high, about 1250 rpm, it eventually goes down but when in gear at the lights it will end up droping in rpm so much that the engine dies, it starts rite back up again, but is very annoying having a high idle, and the truck still dying at the lights. I have replaced the TPS sensor and still no fix, im wondering if the problem exsists in the idle speed sensor, anyone out there had a similar problem that can shed some light for me :banghead:

Sounds like a vac problem. Check all your vac hoses for dryrot, cracks, and tears. Replace as needed. See if that helps.

I'd check the fuel pressure regulator. Also the two wires on the injectors can sometimes get pinched and ground out. Sounds funny but the grounded wire makes the engine do all sorts of funny stuff.