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I have a cummins Isx with fault code 128 094 i fuel pressure…

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I have a cummins Isx...
I have a cummins Isx with fault code 128 094 i fuel pressure low valid ,but most severe level . Truck will not star have followed troubleshooting chart and having no success.Please Help esn 79374760
Submitted: 2 years ago.Category: Medium and Heavy Trucks
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Answered in 8 minutes by:
1/22/2016
Technician: cumminsdr, Mechanic replied 2 years ago
cumminsdr
cumminsdr, Mechanic
Category: Medium and Heavy Trucks
Satisfied Customers: 3,837
Experience: All types of Cummins applications
Verified

What troubleshooting chart did you use? Is the lift pump working? Is their smoke while cranking?

Fault Code: 482
PID: P094
SPN: 94
FMI: 1/18

Fuel Pressure Low - Data Valid But Below Normal Operational Range - Moderately Severe Level.

Engine may not start, white smoke, run rough, or lose power.

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Customer reply replied 2 years ago
Hello, I used fault code procedure from qsol fault code 482. It has no smoke when cranking. the lift pump is working and putting out 12 psi at the ifsm .
Technician: cumminsdr, Mechanic replied 2 years ago

ok no smoke means no fuel, IS fuel present at the test fitting on the right of the main pump? You can put a small pick in the center of the fitting to ensure fuel and remove air . If not check and Verify the fuel shutoff operates and there is 12-VDC present at the terminal of the fuel shutoff valve when the keyswitch is turned on. Remove the wire with the key switch on after verifying 12 volts are present and touch the wire back to the post of the fuel shut off valve. It should have an adubial click when power is applied.

Then check resistanbce from the body of the valve to the post the SPEC 6 to 15 ohms for 12-VDC solenoids, if it is not in spec replace.

you should also remove the valve and inspect the internal parts for damage and wear,.

let me know

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Customer reply replied 2 years ago
Hello, I have fuel but the fuel shutdown switch the resistance with the wire unplugged from the stud to the engine ground is .4 ohms
I obtained a new switch it is still.4 ??
Customer reply replied 2 years ago
I did not see any debris at the fuel switch
Technician: cumminsdr, Mechanic replied 2 years ago

Yes .4 is good but does it click when the power is applied?

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Customer reply replied 2 years ago
it does click
Technician: cumminsdr, Mechanic replied 2 years ago

Ok and you have fuel to the test port on the right of the fuel pump. with no air present while cranking ?

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Customer reply replied 2 years ago
To make sure we are on the same page the test port at the top of the ifsm in front of the main pump. Correct? the lift pump does run for it seems longer than 2 minutes every time I key the switch. Thanks Cliff
Customer reply replied 2 years ago
with the key on yes you have fuel at that port .
Customer reply replied 2 years ago
I fixing to sign off for the day, I will start back up Monday in the am. Can I contact you on Monday at around 8 am. Cliff
Technician: cumminsdr, Mechanic replied 2 years ago

Yes Sir. Just respond to this post. Thank you

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Customer reply replied 2 years ago
Hello, I am trying to continue our troubleshooting chart with your assistance. I was saying that if the key is on then yes you do have pressure at the the fitting in front of the fuel pump.I am installing a clear line at the fitting too check how much or any air is there.
The fitting with the key off produces no fuel. Cliff
Customer reply replied 2 years ago
I need to know the tool no for the cummins fuel metering block test . I need to check the injectors.
Customer reply replied 2 years ago
I need to speak with someone.
Technician: Daniel Wilson,
 replied 2 years ago
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 6,770
Experience: Owner at DJ Wilson
Verified

Hi, It's Dan, Here is the publication

Troubleshooting

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Technician: Daniel Wilson,
 replied 2 years ago

Hi, Did you get this resolved?

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