kandbtrucking

Had a guy look at truck. He said fuel injection pump. So had it rebuilt said it fried my old and new computers. So, getting a fic from a junkyard before taking my new computers back to test new pump. So, it will start and run for about 20 minutes then die. After much trouble shooting I came across a low voltage to pin A center pin on injection pump when it dies. It will have approx. 2.5 volts when it will start but if you check it after it dies it only has .8 volts. If you wait and keeping checking when it goes back up to 2.5 volts it will start. So those volts come directly from fic. Hopefully once i replace fic problem solved. But what if it doesnt. thanxs

Does anyone have the electrical diagram for the accessory panel for a 94 ch613

I hard wired the plug at the injection pump. Truck will not run now. Did get 6-2 and a 6-3 spent all night with a multimeter everything seemed to be fine. I will try the square box jumper. Let you all know how it is going. BTW i put the new v mac module in and it ran for about 20 minutes died and wont restart.

Fisrt thing I was gonna say was replace the power relay in front of the fuse panel but that has already been done. With the engine running wiggle the big round gray plug at the fuel pump and see if engine dies, reves up or almost dies. Could be RH engine wiring harness or injection pump.

I took that plug out and hard wired it just to make sure. Havent tried the square boe yet. will give it a try.

thanx

I have a 94 ch613. After about 20 minutes of running it will die. Does not matter what your doing. Idling, going down the road it will just die. Sometimes it will restart right a way other times I have to bump the starter 4 or 5 times. Kinda like sending a power surge and then it will start. So after spending 3000 at mack the have replaced power relay, and the FIC. It was giving a 6-2 code now nothing but doing samething.