High fuel rail pressure.

[Rcac842]

Hello all, I am getting about 11,500 psi in my fuel rail at idle which I was told and even tested other trucks using insite who are getting about 8,000psi. I changed my fuel regulator/actuator (electric one on pump) and still have the same issue….. I know there’s a mechanical one on the pump and one on the front side of the fuel rail. Is there any more? Does anyone know what might be causing this issue? It’s a 2350 x15 stock everything. Thanks everyone

[tree98]

Are you getting a code for high rail pressure? What made you decide to check your rail pressure?

[Rawze]

.
are you getting faults for excess pressure?.

== use insite to check the 'commanded' and 'measured' fuel pressures and see what the differences are.

[Rcac842]

(02-19-2025 )Rawze Wrote:  .
are you getting faults for excess pressure?.

== use insite to check the 'commanded' and 'measured' fuel pressures and see what the differences are.

Hey, I get some smoke in the morning and it smells like fuel. So I check out of curiosity and I’m getting command at idle 11,509 and measured 11,470

[Rcac842]

(02-19-2025 )tree98 Wrote:  Are you getting a code for high rail pressure? What made you decide to check your rail pressure?

Smelled like fuel and I know my valves were just adjusted which I’m sure are fine cause I was there helping the guy. But I was curious and saw the rail reading was high.

[Rawze]

(02-19-2025 )Rcac842 Wrote:  

(02-19-2025 )Rawze Wrote:  .
are you getting faults for excess pressure?.

== use insite to check the 'commanded' and 'measured' fuel pressures and see what the differences are.

Hey, I get some smoke in the morning and it smells like fuel. So I check out of curiosity and I’m getting command at idle 11,509 and measured 11,470

Its not your fuel pressure ... do an injector leak test exactly like this video shows.. find out hat the leak rate is...
ref: http://rawze.com/forums/showthread.php?t...3#pid75483

[Rcac842]

(02-19-2025 )Rawze Wrote:  

(02-19-2025 )Rcac842 Wrote:  

(02-19-2025 )Rawze Wrote:  .
are you getting faults for excess pressure?.

== use insite to check the 'commanded' and 'measured' fuel pressures and see what the differences are.

Hey, I get some smoke in the morning and it smells like fuel. So I check out of curiosity and I’m getting command at idle 11,509 and measured 11,470

Its not your fuel pressure ... do an injector leak test exactly like this video shows.. find out hat the leak rate is...
ref: http://rawze.com/forums/showthread.php?t...3#pid75483

Just did it and in 60 seconds it dropped 300psi

[Rawze]

(02-19-2025 )Rcac842 Wrote:  ...
Just did it and in 60 seconds it dropped 300psi

if it is not a leaky injector then it can highly likely valve guide seals and not leaky fuel.

if it cannot be found, the pulling the exhaust manifold away from the cylinder head and cranking it up to see what cylinder smokes.

[Rcac842]

(02-19-2025 )Rawze Wrote:  

(02-19-2025 )Rcac842 Wrote:  ...
Just did it and in 60 seconds it dropped 300psi

if it is not a leaky injector then it can highly likely valve guide seals and not leaky fuel.

if it cannot be found, the pulling the exhaust manifold away from the cylinder head and cranking it up to see what cylinder smokes.

Ok thank you, I am going to check the injectors then that and report back. Thanks again