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Curtis B.
Curtis B., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 28370
Experience:  Technician turned service manager on multiple lines of trucks and engines, used in industry.
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Just rebuilt 4d34 engine. Trying to crank, fuel is not

Customer Question

Just rebuilt 4d34 engine. Trying to crank, fuel is not getting to injectors. Pumping getting fuel but fuel is not passing the pump. Can't even figure where the obd2 plug is? 2002 fuso fe639
Submitted: 10 months ago.
Category: Medium and Heavy Trucks
Expert:  Curtis B. replied 10 months ago.

Don't know about the OBD plug, but the injection pump has a fuel shutoff solenoid that has to open , before the injectors get fuel. Do you hear/feel the solenoid click when the key is turned on and off? Has to have battery voltage at all times the key is on.

Customer: replied 10 months ago.
has voltage and is clicking
Customer: replied 10 months ago.
Obd port only has 2 wires.
Expert:  Curtis B. replied 10 months ago.

And tester does not read? I think the problem is at the fuel shutoff solenoid, have you had it out and bench tested?

Customer: replied 10 months ago.
I just determined the clicking is the starter and not the fuel pump
Expert:  Curtis B. replied 10 months ago.

OK, so locate the kill solenoid and see if it has voltage!

Customer: replied 10 months ago.
Ok. It's getting fuel in the pump. I can bleed the lines. You think it's the solenoid
Expert:  Curtis B. replied 10 months ago.

yes, solenoid has to open the passage to the injectors.

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