SeanKroll
Treehouser
why?
The implication here is that the truck repair shop needlessly replaced the high pressure oil pump -- it was the wiring harness all along. The low power and sputtering were completely tied into the electrical loss of current with the pigtail, not due to the oil pressure cutting out due to a bad pump. We are in discussions with the manager about the unnecessary repair -- whether they should just put our old one back in, or maybe meet halfway on the $3K bill. If they would've just done their standard procedure of changing out the wiring harness when installing the pump, we never would've known -- it would have appeared that the new oil pump fixed the problem. As it is, it was a giveaway that the oil pump itself was not the problem.The truck repair shop had replaced the high pressure oil pump and lines (a steal at $3K ) and it had ran fine on the way home from Kansas City, apart from the PTO incident.
...
They were sympathetic to our plight, got a tech out to the running truck within 10 min with his diagnostic laptop. Our foreman ran down the scenario with him and he checked the newly installed high pressure oil pump. He felt the sensor pigtail coming off the back, jiggled it and instantly cured the rough running problem! He unplugged it and looked at it -- sure enough, it was carbonized inside the contacts. He told us that should've been SOP -- whenever they change the pump, they should've changed the wiring harness. He got us right into the shop and had a new pigtail on it within another 15-20 mins...
why?
"in the heart of every man lies a Mexican mistress"
And I instantly smelled it -- coolant everywhere. I pulled off along a very tight shoulder, engine died and I coasted downhill past an overpass and found a gravel DOT access road that I managed to make it onto. Popped open the hood, found a small 6" elbow 1/2" line that connected the coolant pump to the main engine block was split, gushing fluid all over the engine block & pouring on the ground. (Hmm, right below the brand new high pressure oil pump -- perhaps the truck shop nicked the hose putting it in?)Coolant Level
Another day, another Tesla spotting.