Not your Normal No start 6.0...Need some suggestions

[Gary]

Well there is one last thing I can think of. I have known this twice before where the tone wheel on the crank spun, so the injectors were out of time. Both trucks were in shops that friends of mine owned so I didn't actually have my hand on them, I just helped them over the phone. On the first 6.0 they pulled the engine and compared the crank to another good crank, spun the tone wheel to clock it, then welded it, and that fixed it. On the second truck, my buddy said he was able to remove the crank position sensor and stick a screwdriver in it and move the tone wheel. On that truck the customer declined to repair it and sent it to a auction.
So maybe you have something like this going on. It may be easier to pull the oil pan to check it, IDK?? This could possibly be your problem.

 

[bretferd]

I went through the same thing recently. Couldn't get a buddies truck to start. All oil pressure was good. It would try to start really fast and show 1300+ psi for icp. So I changed the glow plug module and nothing changed. It would only start when plugged in. I ended up just changing the fuel filters and now runs like a top. I know you said that you checked fuel pressure ( I did not when having this problem) but could be something cheap to try.

 

[powerstrokedkid87]

We'll after going nuts.... Looks like we finally see an issue...never will I trust ids again for compression. #2 100psi....4&6 barley gets 200psi.... I didn't bother with the other cylinders. New short block for this one as well....

Ids came back with all cylinders good number 7 iirc was a touch under but still adequate

 

[ghohouston]

We'll after going nuts.... Looks like we finally see an issue...never will I trust ids again for compression. #2 100psi....4&6 barley gets 200psi.... I didn't bother with the other cylinders. New short block for this one as well....

Ids came back with all cylinders good number 7 iirc was a touch under but still adequate

I've never been a fan of "relative compression tests" for this exact reason

 

[webb06]

We'll after going nuts.... Looks like we finally see an issue...never will I trust ids again for compression. #2 100psi....4&6 barley gets 200psi.... I didn't bother with the other cylinders. New short block for this one as well....

Ids came back with all cylinders good number 7 iirc was a touch under but still adequate

Yikes. So IDS showed straight across the board on relative compression? I generally do 3 relative compression tests to make sure it isn't biased on one test.

 

[Wildman]

We'll after going nuts.... Looks like we finally see an issue...never will I trust ids again for compression. #2 100psi....4&6 barley gets 200psi.... I didn't bother with the other cylinders. New short block for this one as well....

Ids came back with all cylinders good number 7 iirc was a touch under but still adequate

Relative compression is generally extremely accurate as long as nothing is affecting the readings during the test (hydro lock, bearing failure, etc). You can't go by the color (green/yellow/red) of the bar graph, you have to go by the % of each cylinder. Any cylinder that reads 2% or greater can have a low compression condition. If you get a reading of 2% or greater on a cylinder, then you can do a manual compression test to verify.

 

[Luke@MillerPerformance]

We'll after going nuts.... Looks like we finally see an issue...never will I trust ids again for compression. #2 100psi....4&6 barley gets 200psi.... I didn't bother with the other cylinders. New short block for this one as well....

Ids came back with all cylinders good number 7 iirc was a touch under but still adequate

I'm going to guess they're all low, throws the IDS off because the evenly low compression doesn't cause an rpm change.

 

[webb06]

I'm going to guess they're all low, throws the IDS off because the evenly low compression doesn't cause an rpm change.

I'd agree with that

 

[powerstrokedkid87]

I'd agree with that

For kicks il check the other cylinders with a guage but I willing to be there all

 

[Bustedknuckles]

Get some new batteries in it and put a amp clamp on the injector wires to make sure the ficm is actually firing them. I had one one time where every single thing checked out but the FICM just wasn't firing the injectors for some odd reason put a new ficm in and it started right up. Diesels only take two things to run, fuel and compression. Sounds like you have fuel, time to check compression!

Called it!

 

[powerstrokedkid87]

Called it!

Yea.... Just wish I didn't rely on the relative compression test we did on it.....

 

[Bustedknuckles]

Yea.... Just wish I didn't rely on the relative compression test we did on it.....

Yeah, what are the chances that all the cylinders had low compression? !

 

[Luke@MillerPerformance]

Yea.... Just wish I didn't rely on the relative compression test we did on it.....

How'd the pistons and cylinders look when the heads were off?

 

[powerstrokedkid87]

How'd the pistons and cylinders look when the heads were off?

pistons looked good, cylinder walls looked good no scores, or marks.

 

[Strokinn6.0]

Well...does it run ?

 

[powerstrokedkid87]

Well...does it run ?

I got the short block back n the frame, plan to have the rest of the motor back together tonight.

Been a busy week so we haven't had much time to get progress on this.

 

[Luke@MillerPerformance]

I got the short block back n the frame, plan to have the rest of the motor back together tonight.

Been a busy week so we haven't had much time to get progress on this.

You find anything when it was all apart?

 

[powerstrokedkid87]

You find anything when it was all apart?

Since everything was pretty much new everyting looks good cylinders had a little abnormal wear but that's it really. Il post some pics up
Of the block when we tear it down

 

[powerstrokedkid87]

ok, well after getting non stop customers for the past 2 weeks, I was finally able to set the cab down on the frame last night, spun the starter befor I lowered it, made low pressure oil, tonight il button everything up, and hopefully have this truck finally started!

 

[powerstrokedkid87]

got this truck started up for the first time in a long time last night. I have a little wrapping up to do in order to get this truck drivable, but hearing the engine start was a great sign.