what should idling pressure be?

[scotty2280]

its running about 20 psi at idle. i have noticed a little bit of a surge at idle lately and a few hiccups when driving. im not getting any codes. also i noticed a little haze of blue smoke when idling when truck is warm. any ideas?

[dhanna6powerstroke]

Fuel pressure?

[scotty2280]

64 at idle

[dporter]

at idle boost should be zero.

[dhanna6powerstroke]

You're asking what psi should be at idle. I'm asking what are you talking about? Fuel, HPOP, boost, oil?

[2003kingranch]

map sensor might be going crazy. 64 isnt possible at idle

[scotty2280]

sorry oil pressure. i have a regulated return i set to 64

[dhanna6powerstroke]

Originally Posted by scotty2280

sorry oil pressure. i have a regulated return i set to 64

It takes 500 psi from the HPOP to start the truck, so I can't imagine it being less than that at idle. Low pressure would be considerably lower.

[scotty2280]

yea ipr is reading good. truck starts and drives. i wondering if this an early stage of something going wrong. it seems like the truck is quieter at idle.

[m-chan68]

ICP should be about 580 psi @ idle with the engine up to operating temperature in PARK or NEUTRAL on any late-build '04 on up to '07 truck. '03 engines are usually about 620 psi if I recall correctly. IPR duty cycle should be between 21 to 24% at operating temperature on all engines, idling.