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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 29515
Experience:  GM Grand Master Technician 2007. 14 years experience.
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Rail psi spec

Customer Question

rail psi spec
Submitted: 1 year ago.
Category: Chevy
Expert:  Roy replied 1 year ago.

good afternoon my name is ***** ***** I will assist

what is the year, make, model and engine???


Customer: replied 1 year ago.
o5 chevy dura max 2500hd .fuel rail pressure low. injector ,cp3, fpr .how can I tell which is bad ?
Expert:  Roy replied 1 year ago.

do you have a scan tool that can read this information????


Customer: replied 1 year ago.
touque pro on phone
Expert:  Roy replied 1 year ago.

can you view the information and tell me what the fuel rail pressure is???

are there any codes???


Customer: replied 1 year ago.
no codes. 600 psi cranking. 5800 psi idle. 17000 psi wot. wont start without either
Expert:  Roy replied 1 year ago.

my info is not giving any pressure specs. I am going to re post for you so someone else can help you.

sorry but mitchel is not giving the needed information.

do not rate or repy or it will stay locked on me.


Expert:  GM Tech (Cam) replied 1 year ago.

Hi there, I am Cam. Can I get your name please?

With 60 psi cranking, that is VERY low. This engine needs 1500 psi to start, idle is where ever it wants, 37 mpa, and at full throttle heavy load it maxes out ant 23,600 psi or 160 MPA. Are you using starting fluid to get it running? Also there is no spec for a certain PSI or MPA at each Rpm, rather it bases the desired pressure on engine running conditions.

Customer: replied 1 year ago.
thanks found that already
Expert:  GM Tech (Cam) replied 1 year ago.

OK, so what other information can I Get you? Did you figure out why its low?