LB7 removed Fleece Allilocker, no start now.
- Thread starter Cornell
- Start date
First thing we tried after going over the wiring harnesses, grounds, fuses lol
The bale connectors never got unplugged & plugged back up during the uninstall of the allilocker, did they?
Did you try starting it w/ fresh fuel in a can yet?
monitor injectors? Monitor cam & crank voltage?
unhook dual cp3 & try running it?
Did you try starting it w/ fresh fuel in a can yet?
monitor injectors? Monitor cam & crank voltage?
unhook dual cp3 & try running it?
Not yet on the fuel. Probably get to it today.
Injectors are good
Unhooked top cp3 and wouldn't start....even tho it has enough rail pressure but that was with the TCM connected.
Hooked up a known good TCM and truck wouldn't start.
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Does the dash show correct rpm? I googled the 0374 and found that's a "high resolution" crank/ signal. You would have removed a wire tied to measure rpm for 1 of the 3 thresholds for the allilocker to lock. You probably messed up the engine speed sensor wire. Iirc it's a white wire
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I know it runs through the main bale connectors. That's where I've tapped into it before. You'd have to find a schematic and test that wire the whole length
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Only wire that was cut/spliced into was a brown wire, pin 29 on the red connector to the TCM... then the blue and white wires (from the allilocker) were tied into that wire... white on the allilocker was tied to the tcm side and blue from the allilocker was tied to the harness side.
Other than that it was ground to chassis and 12v to ignition.
So the brown pin 29 wire could cause this? I don't have a schematic off hand but that's the only wire from the trucks harness that was cut/spliced into.
So the brown wire must be for the engine rpm front what you're telling me?
When we put the transmission back in two of the speed sensor clips (male end) had broken tabs. Would a bad speed sensor on the trans be a possible culprit as well? Trans has been out 3 times that I know of.
Other than that truck has a DSP5 switch that stopped working after the engine was built. One of the two wires for that could be broken but then it would just be stuck in the no 1 position tune which should be the big tune. They just haven't had time to replace the dsp5 because the trans was out again because of fried c3's.
Very sorry to see it being way to common anymore, for built motor trucks' having all kinds' of issue's. Shortly after the new owner has taken possession. Honestly make's me question people's integrity. I hope you get it squared away, and are able to enjoy the new ride.:thumb:
It sounds like it's just the new push button locker versus the auto locker? So it's probably just the tcc wire.
Broken clips? Clips used to lock the connectors together? No I wouldn't think that would matter aslong as its tight. I'd still get a new connector though lol
I would check out the turbine versus engine rpm though. Maybe that sensor gone bad cause it to freak out too?
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Broken clips? Clips used to lock the connectors together? No I wouldn't think that would matter aslong as its tight. I'd still get a new connector though lol
I would check out the turbine versus engine rpm though. Maybe that sensor gone bad cause it to freak out too?
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It's not matts truck lol I still own it. Matt is simply helping us out on trying to figure out this issue.....
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Speed sensors will not stop the engine from starting. The speed sensors are for shifting the trans and lock up clutch. I have had trucks in here with all the speed sensors disconnected and they ran fine but had issues with gears.
We know this.
The Ali locker and TCC wire is a moot point at this time. The issue at hand now that the truck cranks but won't start. And we've gone over everything in this thread....if you read all Quinnells posts.
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Yeah, the allilocker is just a bad coincidence. Try a new ficm?
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Tried a new ficm
New TCM
disconnected FRP Sensor Pigtail Plug, along with the dual fueler controller.
When disconnected those it killed all power to the truck basically just the headlights turned on but the fuel gauge (which has 3/4tank) indicated that the truck was empty.
But once those were plugged back in it was back to what it has been doing.
What that means I have no idea
Checked all fuses all grounds and wiring
Logs were sent rail pressure is exactly why its calling for.....
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