fuel pressure

[syty9933]

i know that the way to adjust the pressure to 42 psi is to take off the vaccum line and then set it, but at idle with everything hooked up should my pressure gauge still read 42psi ?

 

[BoostedSUV]

Re: fuel pressure

If it's set at 42 without the vacuum line and truck running it should be reading 8-10psi less at idle

 

[nallj92]

Re: fuel pressure

i though your motor was blown?

yes, you set the FP at 42 psi when it was exposed to atmosphere. When the vac line is on, it is pulling the spring back, thus causing less pressure under vac. at idle.