1989 suburban, trucks sitting in driveway runnning as I type, I shut off ignitition and it keeps running, Is there a relays switch anywhere, when I turn key off, all accessories/ac do turn off, making me think theres a relay? thanks in advance for any tips. update.... well I was able to track it down from smell last night, not sure, but from looking in chilton book, its called "hot fuel module" it looks like a small circuit board . I can remove the small module and the truck starts/stops like normal, but I think if the truck sat for a while it wouldnt have the fuel presure to start. Now my only worry is that theres a short somewhere elese that cause this to fail? So I did some searching, and find little info on hot fuel module, maybe its not needed? is it a emmisions thing? cant find replacment.