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I have searched the forums and can’t find anything specific to my lift pump issue. 


I have a 2002 with 230k miles has a air dog raptor ffrp 150 and edge comp and fuel/pyro/boost gauges

 

On the way to work this morning I noticed I had 0 fuel pressure I then pulled over and bumped the starter, the pump ran for roughly 30 seconds. I then started the truck and watched the fuel gauge it held at 15 PSI for roughly 30 seconds again and then promptly dropped to zero. 
 

I hard wired the pump through a switch and it stayed on then but it burnt the pump up.
 

Has anyone had this specific issue and know a fix ? I’m really confused since it runs for the 30 seconds after the bump but won’t stay on with the truck running (as seen on fuel pressure gauge) 

 

while I’m waiting on the new pump is there any checks I can do without a pump?

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  • Administrator

Yeah common for Raptors. The bearing and seal fail and pumps diesel into the motor then locks up and blows the fuse. Only solution is replacement...

 

My 3rd Gen AirDog 150 died the same way.

 

When you call for a new pump ask for the 4th gen pump the bearings and seal is upgraded.

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  • Administrator

Some version do have a relay and fuse. Then like the DDRP typically don't the plug directly into the ECM which when it does lock the motor up it burns up the ECM circuit. Typically the relay is mounted on the cowl (at least I do this)

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  • Board Of Directors

If you don't have a relay to power the lift pump one can be added with out to much trouble.  

 

 

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  • Board Of Directors
2 hours ago, Doubletrouble said:

Is this relay there to protect the lift pump or the ecm circuit? I assume the ecm?

You're right.  It takes the amp load off the ECM circuit board. 

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My Raptor 100 died not to long ago. Same issue. Popped the fuse on the way to work.  I did @IBMobile relay mod before hand. That relay and fuse probably saved my ECM.  I went ahead and ordered the 4G 150 kit. Came with a plug and play relay and fuse wiring harness. It’s just sitting on the shelf. I still need to warranty the old pump. I’ll use it as a backup. I’ll  see if they’ll let me upgrade to the 4G 150 for a small price. 

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3 hours ago, Threadzy said:

My Raptor 100 died not to long ago. Same issue. Popped the fuse on the way to work.  I did @IBMobile relay mod before hand. That relay and fuse probably saved my ECM.  I went ahead and ordered the 4G 150 kit. Came with a plug and play relay and fuse wiring harness. It’s just sitting on the shelf. I still need to warranty the old pump. I’ll use it as a backup. I’ll  see if they’ll let me upgrade to the 4G 150 for a small price. 

Where was the fuse you popped located?

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