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CV7132005

Fuel pressure

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Hello everyone, I'm new to the group. I have a 2005 cv713 with a AI 370. I was wondering what the fuel pressure should be at idle and operating range. I'm having a little bit of a power issue all of a sudden. Thanks. 

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Spec Sheet on Page 4, under "AMI power increase" by 03' Big Red.  Should be 50-85 PSI. Might find some other good pointers in Big Red's AMI post? 

Edited by Mack Technician

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Tap the link I sent and scroll page 4 till you see a sheet with buncha displayed numbers. It’s a handy summary MackPro put together of general AI engine specs. 

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From what I remember the Original style ETECH engines came with  60 psi overflow valve, there latter came a 100 psi valve that solved some rough idle issues in a few UPS trucks we saw. The ETECH overflow valve has a barb on it for the plastic fuel return lines from the head/injectors. This is a easy way to tell a ETECH engine from a CCRS/ASET engines. Plastic line= ETECH. No plastic line =CCRS/ASET. Starting in 2002 with the CCRS  on through the to end of the ASET engines the the fuel valve opened at 60 psi. So fuel psi should be at 60 + at idle and go up as rpms increase. If psi goes down as rpms go up you got a problem. 

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