:help2: I just picked up my '86 'Burb and after sitting for 1 1/2 years, (158k), it runs OK. Banks sidewinder is fun, buuutttttttt, it doesn't turn off when you turn the key backwards. Usaually a few flicks of the key, and she dies. But last night, no luck. I finally figured out to pull the 12g. red(?) wire off the top of the pump. Did it again when I got home. The radio and warning lights work as if the switch (top of steering column) is doing its job. Seatbelt buzzer was cycling etc. I believe the fuel cut-off solenoid is sticking. Maybe not, pulling power works instantly, two electric contacts on ign. switch? Any ideas??? :D

I you pull the power and it quits, then it is not the fuel solenoid. I would look at the wiring in the ign. sw. Check circuits in fuse panel with test light for key on and off. Good luck.

possible bad diode in the alt.

I had a blazer that did that, turned out to be a short in the instrument cluster. I know it didn't make sense to me either...