LB7: Fueling Issue

[WisconsinHick1]

So I had a junk dual CP3 controller and I replaced it with Fingers controller. It started and ran good for about a minute then the motor started loping and rail pressure was maxed. Fuel was good on controller. I tried a different spot for a ground and still no improvement. Of course the code was the P0089 and reduced engine power. I am leaning toward a bad FPR on one of the pumps.

Anyone have any suggestions I could try?

 

[WisconsinHick1]

I even disconnected the lift pump to eliminate too much pressure from that.

 

[paint94979]

Bypass the dual pump and swap regulators on the factory location pump?

 

[WisconsinHick1]

Wouldn't it be bad for the pump to free spin? Also if both regulators are bad I would still have the same problem.

 

[paint94979]

You could just buy 2 new regulators and hope it works

 

[NC-smokinlmm]

Can't you ohm out the regulators?

 

[WisconsinHick1]

Bypass the dual pump and swap regulators on the factory location pump?

At first I didn't understand this but after talking to a few people I get it lol. Pull the serpentine belt and start it to see if it idles normal if not I'll be buying two regulators and be done with it.

 

[paint94979]

Exactly

 

[black07]

At first I didn't understand this but after talking to a few people I get it lol. Pull the serpentine belt and start it to see if it idles normal if not I'll be buying two regulators and be done with it.

I was fighting the same problems, triple checked everything and thought maybe the controller was bad. Ended up being the fpr in the valley, which I didn't get because it was fine before putting dual pumps on. Ended just buying two new regs and its fine.

 

[WisconsinHick1]

Well the pump in the valley is good. So just for safety sake I'll be buying two new regulators and keeping the one from the valley pump as a spare. Is it worth it to go to LBZ regulators or not? Where's the best place to buy them from?

 

[Lparrill]

Well the pump in the valley is good. So just for safety sake I'll be buying two new regulators and keeping the one from the valley pump as a spare. Is it worth it to go to LBZ regulators or not? Where's the best place to buy them from?

This is exactly what I did. I went with LBZ regulators on both. I got mine from Alligator for $180 per.

 

[NC-smokinlmm]

Ever hear about LBZ regs going bad? I don't. I'd say swich over...