I have been chasing a strange problem or combination of problems. First is intermittent engine kill. my 94 V8 D-90 would just turn off as if i turned the key off. Engine, dash lights, and everything else would just go off. replaced the electrical portion of the ignition switch and it went away except for one re-occurrence... might have a short in the dash somewhere...
the second more troubling is erratic idle after the truck is warm. replaced stepper control, PCV hoses, speed sensor, coolant sensor, fuel filter, fuel pump, I have a mallory dizzy and good spark. Connected to rovergauge and drove the truck after replacing everything and the idle now seems to be okay. not perfect but i remember that after disconnecting battery it takes time for the ECU to reach an equilibrium.
Now rovergauge and the code readout agree that code 15 fuel temperature sensor is not functioning. replaced it with a brand new sensor and went through clearing the codes and the code comes right back. I have double confirmed that i did not switch coolant and fuel connections.
I am going to go for a longer test drive today but i am wondering if anyone has had an issue clearing the fuel temp sensor code or knows of a reason for a false code 15?
PS rovergauge is pretty cool