12.7 questions

Reason I had it at detroit was I hadn't run it in 2 yrs and rpm guage was not working. They say they dealers can pinpoint where the problem is but after 3 gauges, they tell me they will bring it in again and fix it again for another $150.00/HR. and that there was nothing wrong with the truck and that on this old of a truck the rpm guage can just go out and it is not fixable. Obviously, I didn't buy that and felt I wasted a lot of money for 3 different rpm gauges. I drove the truck to a fella across town. We did lots of stuff. Tried a different ecm, new cam-crank sensors, chased wire all the way back from rpm guage to computer. It shows a high voltage and does not change. And no change when we tried a different ecm. I had a very small fuel leak at the pump so I changed for one of his used fuel pumps. Truck seemed to run and start fine even after sitting for a month. Turned over less than one revolution-started. I drive the truck to my place to grease, etc. Just as I drive in the yard, check engine light comes on. I shut off. Try to restart. Do not pass go. No $200. Change fuel filters and restart with either. Noticed, but not experienced enough to be alarmed. Secondary fuel filter was very loose. And the flash codes flashed a code 42. This is the code for cam sensor. I check cam sensor nothing seems amiss so being ddec 3, I disconnect battery to clear the code. It did and now, no codes. I got a brand new pump thinking possibly there could be something wrong with pressure on used one and the freightliner dealer sold it to me for about the same price as SRS and TRS sensors. It seemed the new pump was working. I am pretty sure I had quite a bit of fuel out the back of the head. Put hose back on back there. No change. I go to the fella with the wrecks get different SRS trs sensors no change. Think go to square one. Recheck everything. I find new pump will not pump even with pressure applied. Put old pump back on. Was pumping real good through 2nd filter. And I have battery charger on. Every so often I would run the starter a while and ran it on either a little. But after about 6 cans I am concerned about too much either. Also the last time, I propped throttle about half open. I am baffled.

 

Yeah. This is my latest assumption. I ran out if fuel in my generator last night running charger all night. Am on my way into town for fuel as we speak.

 

I have not ruled out fuel or electrical. As I mentioned. I have been checking both. Only as far as electrical, if there were a true code, it should repopulate after being cleared. There is an electrical
Wire going to secondary fuel assay. But even being unhooked, will still let fuel by it. And not sure what it does. It gives no codes. It is in the back of my mind to check for signal to injectors.