LB7: Installed a LBZ pump in a LB7 and now will not start.

[DetailsUnlimited]

Done this many times. And have not had this problem before. Did the install. Changed the tune for the bigger pump. All sensors were hooked back up and just cranks. Log shows actual at 26107 and desired at 5800 while cranking. Not sure what is going on there? No leaks, any suggestions?

 

[clrussell]

Un plug the fpr? Or put a stock tune in it..

 

[DetailsUnlimited]

I'll put the tune in it in the morning. That will just max rail out correct? It's showing 26k with it plugged in now while cranking.

 

[WVRigrat05]

Sure everything is plugged in right? I did that once on the LLY, I plugged the baro sensor into the fpr and hooked both of their connectors back into themselves. It would start but wouldn't stay running.

 

[DetailsUnlimited]

I'll check everything in the morning. All it does is crank. Will not start.

 

[DetailsUnlimited]

Installed original tune and still not start. Looking at plugs. Any help with this issue would be great as I need to get this guy back on the road.

 

[dirtydmax]

Check for broken wire at fuel pressure sensor on hp fuel block.its a 3 wire plug and they break right at plug.broke wire there will max rail.No codes?

 

[DetailsUnlimited]

No codes, I'm tearing back into it to make sure all plugs don't have broken wires.

 

[DetailsUnlimited]

No broken wires sofar

 

[DetailsUnlimited]

Plug on back of the fuel block

 

[dirtydmax]

Plug looks good.any way to check voltage to those 3 wires and fpr plug?is rail still maxed while cranking?

 

[DetailsUnlimited]

Putting it back together enough to start it and see what happens

 

[DetailsUnlimited]

Not sure what it was. All plugs were solid. It just started so it had to be rail, fuel block or wire harness connection were the only one I disconnected and reconnected. Thank you to the guys that called and answered on here!