LB7: fuel regulator buzzing

[Blueox03]

I did some searching and came up empty handed....

The fuel regulator on my CP3 it buzzing like a loud lift pump and it won't start. Is it shot or does something else cause this????

 

[Blueox03]

I got it home and scanned it, no codes.... Unplugged the FPR and gave it a shot....no difference, except the buzzing HaHa... this has me stumped...

 

[THEFERMANATOR]

This probably won't help you, but I noticed today that my FPR will buzz as well if I let it sit for about a minute with the key on engine off. I was bleeding out the ABS and noticed it ealier today.

 

[Mike]

Make sure you don't have air in your fuel line up to your cp3?

 

[LB7Diesel]

Mine does it too. Been doing it ever since I did the cp3 mod. Don't know wtf is causing it. I even logged what it was doing, and it shows nothing. It can't be good, but it's lasted over a year now.

 

[770JOHNNYW]

so my regulator on my second cp3 started doing this shortly after the truck just shut off in the driveway??? Did any of you guys fpr ever completely give up?

 

[rmallen30]

both my lb7 and lbz do this aswell w/ dual pumps

 

[schulte]

Check the pigtail wiring harness that goes down to the FPR. It's probably worn through or having a bad connection.

None of my FPR's have ever buzzed; not in my LB7, not in my brother's LBZ, not either one on my dual fueler LLY.

 

[THEFERMANATOR]

Mine buzzes in my BURB with the LB7 and a new regulator. I never noticed it until one day I flashed it with the hood up.

 

[770JOHNNYW]

Check the pigtail wiring harness that goes down to the FPR. It's probably worn through or having a bad connection.

None of my FPR's have ever buzzed; not in my LB7, not in my brother's LBZ, not either one on my dual fueler LLY.

the motor only has a couple hundred miles on it wouldnt think it would wear through that quick...ill check it now!

 

[schulte]

the motor only has a couple hundred miles on it wouldnt think it would wear through that quick...ill check it now!

Loose connection maybe?

 

[SHOTZY]

These are completely stock regulators doin this? Mine is doin this as well, but mine is modded. Never did it before. My thinking was I didn't spend enough time polishing the ultra close tolerance piston inside of it when doin the mod.

 

[770JOHNNYW]

yea mine are all stock...

 

[SHOTZY]

Damn, well that shoots my theory all to heck!