Engine swap holy moly , 06 LBZ into 05 LLY, no start

[Ron Nielson]

Lots of grounds available for fixing! Might check the primary devices for poser and grounds.

From another post today:
Disconnected the bats for 30m reconnected and it started..

Amazing how many times this gets the engine going. And it doesn't cost anything. disconnecting negative battery posts on both batteries will get the job done

 

[TheBac]

Please try to keep all issues related to your swap/no start/wiring problems in this one build thread in Repower/Transplant.

 

[HDduramax]

So yeah I completely understand like I said I rewired some wiring harnesses and it cranks but it just won't start unless I put starter fluid spray in the manifold and a couple days ago it did start but now it just doesn't want to start a cranks but does it starts I did find a ground yesterday fix that one as well there's air stuck somewhere and I don't know what to do after priming the fuel it wants to crank just doesn't want to start there's got to be there somewhere trying to figure that out I appreciate all of y'all I'm trying to help me

 

[HDduramax]

Lots of grounds available for fixing! Might check the primary devices for poser and grounds.

From another post today:
Disconnected the bats for 30m reconnected and it started..

Amazing how many times this gets the engine going. And it doesn't cost anything. disconnecting negative battery posts on both batteries will get the job done

Cool beans thank you for the ground diagram I'm on it right now

 

[TheBac]

Need to go back over what you've done in detail bc you've forgotten something.

Did you use the entire LBZ underhood wiring harness? If not, what did you use?
Did you attach every ground wire from that harness to its proper spot, whether that be engine block or frame?
Have you checked all the fuses in the fuseblock as good, esp the ignition fuses? (No assuming)
Did you verify your crank and cam sensors are good and the signals are correct with a scanner?
Did you check FPR and CP3 cranking output with scanner?

 

[1FastBrick]

Since this is a swap, what did you do about the Anti Theft? Did some one disable it in the ECU?

 

[HDduramax]

Need to go back over what you've done in detail bc you've forgotten something.

Did you use the entire LBZ underhood wiring harness? If not, what did you use?
Did you attach every ground wire from that harness to its proper spot, whether that be engine block or frame?
Have you checked all the fuses in the fuseblock as good, esp the ignition fuses? (No assuming)
Did you verify your crank and cam sensors are good and the signals are correct with a scanner?
Did you check FPR and CP3 cranking output with scanner?

I'm on it right now that's what I'm checking to make sure all my grounds are good make sure nothing is exposed or touching any kind of metal also I did replace the camshaft sensor the crankshaft sensor the high fuel pressure regulator sensor but I'm thinking it's the regulator it might be that but I'm still going to go at this I appreciate you

 

[TheBac]

Since this is a swap, what did you do about the Anti Theft? Did some one disable it in the ECU?

Didnt think of that. Good point.

 

[HDduramax]

Since this is a swap, what did you do about the Anti Theft? Did some one disable it in the ECU?

Hummm not sure about that yet

 

[HDduramax]

Is it possible for that to be one of the culprits

 

[1FastBrick]

Is it possible for that to be one of the culprits

yes. Is the security light on?

 

[2004LB7]

When you say it only starts with starting fluid, are you saying it continues to run or it only runs while starting fluid is in it?

If it does start with starting fluid then you have a fuel issue

 

[HDduramax]

yes. Is the security light on?

No it's not

 

[HDduramax]

When you say it only starts with starting fluid, are you saying it continues to run or it only runs while starting fluid is in it?

If it does start with starting fluid then you have a fuel issue

No it wants to start but fails so I figured the pressure regulator or the fuel primer it's self later on getting new hoses for fuel line pressure primer along with fuel filter and checking all the grounds thanks for the input

 

[HDduramax]

We ordered a fuel pump primer our big issue found. While waiting for this item can I start my motor by bypassing this item but unplugging the return line with diesel to start it. If so is it the top or bottom return line. Feeling confident on doing this

 

[HDduramax]

yes. Is the security light on?

And sorry reframed the answer but the security light isn't on

 

[1FastBrick]

And sorry reframed the answer but the security light isn't on

Ok, it will throw a code as well. If you think it's a fuel issue, fix that first and continue on. I don't know how to answer that question.

 

[PureHybrid]

We ordered a fuel pump primer our big issue found. While waiting for this item can I start my motor by bypassing this item but unplugging the return line with diesel to start it. If so is it the top or bottom return line. Feeling confident on doing this

I didn't read every post you made, but I would not bypass the fuel primer, you'll be bypassing the filter as well unless you have an auxiliary fuel filter / pump setup. I'm sure it wouldn't be the worst thing to bypass it for a bit, but there's zero filtration otherwise. The filter head / primer should have arrows on the inlet to indicate which way is in / out

 

[HDduramax]

I didn't read every post you made, but I would not bypass the fuel primer, you'll be bypassing the filter as well unless you have an auxiliary fuel filter / pump setup. I'm sure it wouldn't be the worst thing to bypass it for a bit, but there's zero filtration otherwise. The filter head / primer should have arrows on the inlet to indicate which way is in / out

Ahh gotcha I greatly appreciate you will do this and let's see. The reason I asked that question is cuz I had a customer yesterday that came to buy a crankshaft from me, and he did say if I just want to try to turn it on just to see if the engine works or everything's good besides that primer part to do that and I was just like I've never heard of such a thing so that's why I was asking but I greatly appreciate y'all being here for me and we'll see

 

[HDduramax]

Ok, it will throw a code as well. If you think it's a fuel issue, fix that first and continue on. I don't know how to answer that question.

I'll see. Actually since he was a customer of mine I think I shoot a text to him and clarify. Then we will go from there