Cummins ISB codes 391&364

391 shows fuel shut off valve,
364 shows fuel pump control module.

 

As I remember '02 engine has Bosch VP44 fuel pump. and it is a big problem

391 is the bad fault code. There is comntrol board on injection pump. There are two power FETs on it. They are cooled with fuel flow. And if you pump in fuel with starter (when you ran out fuel) it may go bad.

364 is ECM Pump commumication fault. may be bad wiring.. may be bad pump. engine wont starting.

115 - engine speed problems. may be bad wiring/sensor ore may be engine runs rought ore stalls.

234 - engine overspeed. usually related with pump going bad, engine selfrevs and stalls....

373 - fuel pump used shut off valve to stall self reveng engine (if code is stored).

369 - ECM - pump sihronisation fault.... it is bad

434 - kl. 30 low voltage (hah, you tried to start engine till battery was low)

362 - fuel metering circut went bad

VP 44 is expencive and very difficult to fix, remove and install injection pump, but it is very accurate and was ready to E3 and EPA 2003 emissions.

Was used on MAN L series engines and on Cummins ISB. But becouse of many problems MAN and Cummins switched to Common rail with MS6.4, MS7 and CM570 control units.

There are two workshops in Ukraine, where they rebuld VP series pumps. Equipment is expencive. Parts too. So trucks with VP pumps are much cheapper here.

So look for Bosch workshop. Cummins and MAN dealers can change pump with new

 

Sorry, we don't get into these engines, no one around here really has any.

 

I would say the same about MAN L2000. VP44 is the nightmare.
It is overpriced!

So look for later engines becouse later Bosch discontinued VP pumps and they introduced CRD for small truck with MS7 ECM, so later all Cummins ISB, ISL, ISF, MAN TGL, IVECO and other got Bosch CRD system.

Yep, I do not like CRD, but it is much better, more precision, more reliable and less expencive then VP series pumps

 

It is a emergency shut down relay. Either there is a condition to shut it down, 9 times out of 10 I have seen that relay goes bad, and often. Driver side of engine, relay from ecm. Make sure voltage, If 24v napa ect. will tell you they have a match except 12v.