the truck will start up, run for about 10 minutes then just shut down. It has fuel splashing up out of the throttle body just after it shuts down. I also am getting code 27 but do not seem to fid out what this means beside fuel control circuit. i have replaced the fuel pressure regulator and the o2 sensor. but that has had no effect on the shut down problem. I also have checked the spark just after it shuts down and the spark will jump a good half inch.any body got any ideas
roysduster

 

could be an issue with the wiring in the fuel pump relay or it's circuit. there is a splice in there similar to the ASD splice. I had a similar issue on my '92 and i took a stab and won with the ASD splice, but I also had an ASD code where as you have a fuel control code, so I'd check the fuel relay and/or the circuit.