motor is a 12.7 detroit 430 hp engine 1993 peterbilt 379 semi tractor

 

can you refer me to anyone whos familiar wiht 12.7 detroit. i bought a 93 peterbilt 379 and later found out that the truck shuts down in the rain and will not restart.the major overhaul done at Detroit has 91,000 miles on ti out of warranty for time tho. the motor did the same thing before rebiulding it... it has to be a ground or somethign wiring related. i was told soem mice were found under hood of truck but nothing looks chewed up... any advice as to what would cause this motor to just shut down only when moisture present or where i can begin to search for issues.or how to troubleshoot it?any info would be super to start with or maybe you possibly know of someone who specializes in detroits? thanks Rich Foreman indiana trucker.the garages seem to get it running again somehow but unable to cure the issue because it reoccurs mostly when it rains and not always. the previous owner thinks mice got intot he wiring somewhere but unsure no visual evidence of mice or rodents anywhere under hood on under dash? any suggestions or ever heard of this happening??

 

We need Radio Flyer !!!!

Ill State this Most Wierd Electrical Issues are fixed by Running addional ground wires from the Body to Battery To Frame to Engine

Try this Take a set of jumper cables and Connect to Neg Battery Terminal then connect the other end to The Engine pulling Bracket I fixed a 94 CTD this way and got it home

DM

 

IS this the Detroit that has the electric shut down where it cuts the intake air off by triggering a solinoid that allows a flap to S/D the air..if so then you should check the wiring on that to see if it OK and water tight

 

Whats the Status on this ?