P0088. Fuel rail pressure will hit 29,000 at times

[Badheartbull]

So p0088 code. Replaced both fpr. Took it for a drive and it did it again 20 mile later. Cleared code drove home fine. Don't know what to do next.

 

[Badheartbull]

Lmm built engine, ppe duel fueler, Danville tunes about 20,000 miles on setup

 

[Dozerboy]

Have you talked to your tuner to see how the tune setup?

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[Badheartbull]

No. But same tunes for 20,000 miles

 

[Badheartbull]

I let my truck idle for 3 minutes it was fine then fuel rail pressure jumped to 29,000

 

[IOWA LLY]

I let my truck idle for 3 minutes it was fine then fuel rail pressure jumped to 29,000

Check your supply side pressure.

Also make sure your return isn't restricted.


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[2004LB7]

Maybe a loose wire / bad connection at the regulator?

Can you hear the engine noise or knocking when it does it?

 

[Badheartbull]

Maybe a loose wire / bad connection at the regulator?

Can you hear the engine noise or knocking when it does it?

Yes sounds like a ford

 

[Badheartbull]

Check your supply side pressure.

Also make sure your return isn't restricted.


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Pressure at lift pump is at 8 psi

 

[Badheartbull]

Pressure at lift pump is at 8 psi

Was at 9psi before. I adjusted it

 

[ZeroGravity58]

Could the dual fueler box be bad?

 

[Badheartbull]

Could the dual fueler box be bad?

I'm going to try this next thanks

 

[Badheartbull]

I just put the new controller on 25 miles so far so good.

 

[quinton]

If it happens again check your ground and positive connections. I had my ground wire loose and it was maxing out every now and then.

 

[Badheartbull]

If it happens again check your ground and positive connections. I had my ground wire loose and it was maxing out every now and then.

On the controller?

 

[quinton]

Yes. If control is all hooked up and isn't connected good it will max out rail pressure. Not sure how it works exactly but it splits the system and when it doesn't have good connection it will do that. Luckily I had just read about it and was logging my truck at the time and found the loose ground wire.