Intermittent cel light rough running

[powerstroke420]

Ok guys little history for ya first sign of a problem I turn the key to start the truck cel stays on truck cranks but will not start. Cycle key again starts right up. Couple days later I'm pulling up to a light on the brakes light comes on engine stalls cycle key light off starts right up. Third time I was driving down the highway about 65 hear a weird knock lose engine power not all the way pull over turn the truck off lights off when key cycles start it sounds bad again light comes on start heading home light stays on for about 1 min goes off truck drives all the way home like nothing happened.

Read the codes after the second time got a icp code cleared it and it stayed away the last time I read it yesterday I got a p1316 (idm malfunction) ran a test and got a p1277 (cylinder 7 high to low side open).

Where should I start? going to go over all the wires from the idm to the cover when I get home first then start digging in any advice is greatly appreciated thanks in advance yall.

2001 ecsb 7.3, gtp38r, blank pedestal, ccv mod, reg. return, ad2 pump, gh tunes om a hydra, bts built 4r100,and more

2012 yfz450 bunch of stuff

 

[ghohouston]

Ohm out your valve cover harnesses. If you dont find any strange readings, maybe pop the valve covers off and check for a loose connection where the harness clips together.

 

[powerstroke420]

Thanks will do how many ohms should i see?

2001 ecsb 7.3, gtp38r, blank pedestal, ccv mod, reg. return, ad2 pump, gh tunes om a hydra, bts built 4r100,and more

2012 yfz450 bunch of stuff

 

[ghohouston]

Around 4 ohms or less

 

[Northwoods2002]

Ohm it out, if everything looks good, replace injector. I had high to low open on cyl #2 and it only went away after I replaced #2 injector...


(Now I have 8 ADs to send in for rebuild > )

 

[powerstroke420]

Thanks yall when I get in there this weekend I'll see what I can find.

2001 ecsb 7.3, gtp38r, blank pedestal, ccv mod, reg. return, ad2 pump, gh tunes om a hydra, bts built 4r100,and more

2012 yfz450 bunch of stuff

 

[powerstroke420]

Thinking it's time to just rebuild all of them to small hybrids and replace all the glow plugs and wiring harness and all that good stuff.

2001 ecsb 7.3, gtp38r, blank pedestal, ccv mod, reg. return, ad2 pump, gh tunes om a hydra, bts built 4r100,and more

2012 yfz450 bunch of stuff

 

[Northwoods2002]

What did you finds out? Everything tested good? Like I said, I did everything only to figure out that code usually means a rebuild/replace is in order...

 

[powerstroke420]

Seems to be getting power to the plugs so it must be under the cover somewhere.

2001 ecsb 7.3, gtp38r, blank pedestal, ccv mod, reg. return, ad2 pump, gh tunes om a hydra, bts built 4r100,and more

2012 yfz450 bunch of stuff

 

[isootmypants]

Double check you main harness going over your driverside valve cover. Loosen 10mm bolt and pull it back to the fender. Look for rub thru. Once in. While you'll hit a bump it will short on valve cover

 

[powerstroke420]

Will give that a check gonna hopefully have time this afternoon to start going over it works been killing all my time lately.

2001 ecsb 7.3, gtp38r, blank pedestal, ccv mod, reg. return, ad2 pump, gh tunes om a hydra, bts built 4r100,and more

2012 yfz450 bunch of stuff