Engine/Transmission (1998.5 - 2002) new vp 44, no start

[blowinsmoke]

got a rebuilt injection pump for a friend's 98. 5, he put it on and now it won't start. it would start and run with the old one but would be a hard starter and die under full power. I helped him re-bleed the lines three times. there is fuel coming out of all 6 lines. the place where i got the pump said it is the washers between the nozzle and injector body that are leaking air. Industrial told us to pull the pump and re-stab it since the key may not have set right. he has done several of these with no problem, so I cannot convince him that it might be his fault. any ideas?? it has no codes, fass fuel system, blue chip fms

 

[CPavlic]

If the key was not set right more than likely you wouldnt have been able to suck the pump up to the housing, there would still be a gap. Seeing how it ran with the old one kinda makes it hard to say that its the washers leaking air. I would say its a bad reman, but not 100% sure

 

[JLandry]

Did he do anything else at the same time which could have affected this... I mean, did he mess with anything electrical?



I'm wondering if the VP44 is getting power?



Might not hurt to check all the fuses in the PDC (Power Dist. Center) on the driver's fender under the hood.



John L.

 

[RSica]

Hi my friend



Here is another method for getting air out that works for me time and again when cracking injector lines doesn't:



Crack the fuel return line open at the VP44, cycle the FASS multiple times and attempt to start. You may have to do this several times, and I find that pushing down on the throttle also helps. I certainly hopes its just an air issue and not electrical/electronic - good luck !



Regards,



Randi

 

[blowinsmoke]

thanks for the help guys, but i think its a bad pump. finally convinced him to pull and re-install the pump-no luck. All fuses and relays were good. even the blue chip fms said pump voltage was good

 

[JLandry]

thanks for the help guys, but i think its a bad pump. finally convinced him to pull and re-install the pump-no luck. All fuses and relays were good. even the blue chip fms said pump voltage was good

Did he try replacing or temporarily swapping out the ASD (Auto Shutdown Relay) in the PDC? If that relay is bad, the engine will crank as normal but the PCM will prevent the VP44 from injecting fuel.



I didn't suggest this earlier because you said it would start with the old pump. Maybe this relay was failing and got worse when the new pump was installed.



Best regards,



John L.

 

[AllianceDiesel]

try a shot of ether and see if it starts, sounds to me like maybe the connector tube o-rings might be leaking, it also could be a electrical problem, see if there are any codes.

 

[blowinsmoke]

i'm getting a new pump in today, so we'll see. As far as ether, he used a lot more than i care for several times. they also tried gasoline in the intake before i got there. I dont undertsand why people listen to idiots rather than someone who has a clue

 

[PRout]

try a shot of ether and see if it starts, sounds to me like maybe the connector tube o-rings might be leaking, it also could be a electrical problem, see if there are any codes.

All 6 o-rings bad??

 

[Bob4x4]

over 1k vp44s changed,I have not received a bad pump yet. The way the pumps are set up on the stand,I doubt there are many shipped that are bad.

When any doubt exist on the vehicle wiring/ecm side just hook up a Cummins hot box to start and run it.

I have not seen bad o-rings cause a no start on a 2nd gen yet.



Bob

 

[blowinsmoke]

finall got the other pump in yesterday and put on last night. this was the easiest start i've ever had after changing a pump. thanks for the help guys

 

[JLandry]

So where did the first (dead) remanufactured pump come from, and where did the second one come from?



Thanks,



John L.

 

[blowinsmoke]

they both came from the same place- they sent me another one. it was midwest fuel injection. I'm sure that this was a freak deal that would only happen to me

 

[grimesja]

What is a cummins hotbox?

 

[JLandry]

What is a cummins hotbox?

It's a device used to test a VP44 fuel injections pump.



To use it, the VP44 connector is unplugged from the vehicle's wiring harness and the Cummins tester is plugged in place. This isolates the VP44 from the ECM and PCM. The tester also connects to the vehicle battery. The engine is started and the tester supplies power and either a low or high idle signal to the VP44.



In theory, the tester verifies whether or not the VP44 is functioning properly, independent of the vehicle's ECM or PCM.



See: VP44 Fuel Injection Pump Tester



Best regards,



John L.

 

[grimesja]

It looks like a nice tool to have, even though it is kinda pricey for a private user. However, I will get one I have gone through 2 injector pumps in three days. I don't know what the issue is I'm not getting fuel from the injection pump to the injector lines. I have 23 psi at the inlet line to the injector pump. in both cases the truck shuddered and stopped running immediately. I have a 0216 and 1693 code. Any ideas?



I have swappeed relays in the power control module, checked fuses, etc. .

 

[Bob4x4]

23psi is too high at start up for the vp and not needed while running. Turn the pressure down.



Bob