TH Cummins

Actually the lights just go on and off as they please. None of the lights were on when I brought it there of course

So I went to the dealership this last week and had the ECM reflashed. The check engine light was on and they gave me a code for a Crank Position Sensor. I replaced the sensor and starting issue is fixed. However, my check gages, check engine, water in fuel lights are all on, and the oil pressure gauge reads 0. I thought for sure this was due to the ECM needing a reflash. Any ideas? thanks

No I haven't tried a different cluster. I guess that would be an option if I could get my hands on one. Does anyone know if the ECM also controls the tach? Because now my tach started coming and going as well?

I went and got new batteries, my old ones were junk. All was good for a while but now my lift pump isn't running, at all. You can bump the key and I don't get a cycle, and if you try and start it, it will just crank. I'm not sure if it would just be the relay, the ECM, or the lift pump itself? Any of those things a common problem? Thanks

I've cleaned, and checked all connections to make sure they're tight. Everything was good

Ok so now my main concern is the issue with it not starting. I atleast want to be able to start it and move it around before I bring it somewhere to have the ECM flashed. The batteries will barely crank the truck over, sometimes it starts and others it will crank for a short period until they are dead. If I check them they read 12.8 or higher every time but still barely crank the truck.. Does this mean the batteries are junk? Just seems weird that they read good on a tester

To be completely honest I'm not very familiar with the any type of electrical work, wiring, checking for codes, or computer related problems. I just know a guy that used to work at a chrysler dealership and has a scan tool and said that some of the older models just had a vin on the ECM and if you punch in the vin on the new ECM it will sync to the truck it is now in. He said I may have to end up bringing it in but being that he could check it for no charge first I figured it was worth a shot

Yeah, I actually had an appointment to get it to a guy that does that this last weekend but didn't want to bring it down there and have it be dead in his way because it won't start from day to day. Wanted to get that squared away before I cruised down there. Makes sense though, I'll try to get it there. Thanks

Ok, So it seems that every time I dig into my truck to figure out the issue something else comes up.. I'm at a loss and have no idea where to go from here. The water in fuel light, check gages, check engine lights are all on. The oil pressure gauge sometimes works, and sometimes doesn't, radio cuts in and out. The tach also will come and go as it pleases. Now I am also having trouble with the truck starting. Some days it fires right up, and others it will crank til the batteries are dead. If I leave it sit for a day or two it won't start when I try. Idk if it's the ECM, the gauge cluster itself, wiring, a sensor, multiple sensors? The truck runs PERFECT, nothing was wrong when I pulled the motor, had it rebuilt, stuck it back in, plugged everything back in, and now issue after issue.. Any help? Thanks

The date of manufacture is really close, exact same part number. I'm not sure if it was an auto or manual. The guy I got it from just receives parts in bulk and supposedly checks them to make sure they work and whatnot but doesn't know the ins and outs of the vehicle they come out of.

Just needed to run the pump, and crack some of the injector lines. Started right up and cleared out almost instantly

Even after it ran fine for a day or two and none of those lights/errors were on? Just thought it was weird that it wouldn't have happened right away and been wrong from the get go

It also has a new ECM, well it's just out of a different truck, but new to mine. Didn't have it flashed but it worked right when I plugged it in, don't know if for some reason after a couple days of driving it this could be affecting it or not? I'll check for loose connections tomorrow though, seems kind of odd for something to actually be wrong

The engine

So I finished rebuilding my truck the other day. Started right up and took it out a few times, ran and drove great. The last time however, I took a corner and accelerated and my gauges went nuts. The water in fuel, check engine, check gauges lights all came on and my oil pressure gauge also reads 0. I have no idea what's going on or why that happened? Ran the truck a little after the fact and it still runs and idles fine without any excessive noise so I don't think it really has no oil pressure. Any insight would be appreciated. Thanks!

Got her figured out and started last night. Thanks for the help guys

I was under the impression that some of the trucks actually came with the in tank pump. I don't know tons about these trucks so thanks for the heads up. So at some point this has had a lift pump put in it. The ECM is used out of a different truck but has the same part number. Wait to start light comes on immediately so I'm assuming it works as it should?

Yeah, stock in tank lift pump

I am having some troubles since rebuilding my engine and putting it back together. I'm not sure if the problem is caused by the lift pump, just not being primed, or the ECM. I put a new ECM in my truck do to the fact that my old one had a faulty wait to start light and thought maybe it was messing with the lift pump. I also tried priming it by bumping the starter and my pump does not run for the 20 or so seconds it's supposed to, and doesn't always run at all? It will crank but haven't got it to fire or start. Could this be from the lift pump being junk? The ECM not being flashed for my truck? Or just simply isn't primed yet? Any help is appreciated, thanks!