Gas in diesel

[SRehberg]

The truck is a '05 H. O. The tank was accidently filled with gasoline on a return trip home. After about 40 miles on the freeway, the truck started running rough, so the owner pulled over to the shoulder, before backing up to a off ramp. The truck was parked and is now in the process of being towed home. Other than the obvious drain the tank, lines and replace the fuel filter, how does one go about draining the CP3 pump? The tank was down when fueled, so is there damage that could occur to the CP3 pump and injectors? Thanks for any help!

 

[goodguys75]

look under older post, Im sure there is miles of info of what to do... . damn that sucks... ... ... .

 

[TCDiesel]

CP3 . . Injectors on 40 miles of highway driving with 20 Gallons of gas are going accelerate wear. You may get it to run again,but it will show its ugly head in the Future.

 

[rbattelle]

Can you purge the CP-3 by cranking the truck with the discharge line disconnected?

If it were me, I'd flush the system as you describe and then keep my fingers crossed.

-Ryan

 

[SRehberg]

I appreciate the replies for this unfortunate situation. I am unsure as to the best way to purge the CP3 pump but I was afraid the wear was the major issue as mentioned in the replies. Sickening :{

 

[TCDiesel]

The CP3 holds 16oz. . You can unplug the FCA and divert the fuel to a container,2 or 3 times over (crank) will clear it out. You need to remove the Pump and have someone that knows the Unit... they will inspect for wear. . If damage and you operate in that condition it will destroy the injectors. . if not already to late. if the pump shows wear the injectors are done. if NOT the injectors may work, BUT I would start a Injector/Pump fund for future replacement.

 

[AMcCormick]

Is this a safe thing to be doing? The out put psi of the CP3 is extremely high. How do you do this safely?

 

[rbattelle]

Is this a safe thing to be doing? The out put psi of the CP3 is extremely high. How do you do this safely?

Don't stand in front of the discharge line.



-Ryan

 

[Wingate]

where I work, we had a guy fill a d-max equipped service truck and run it till it shut down... . got it wreckered to the dealership, drained, and purged. Fired it up and the truck is still running today... . thats been about 5 years ago.

OTOH, I just condemmed a HPCR engine due to the customer putting gasoline in it and running it... BUT it was being run at full rated speed and near full load... so damage/wear is accellerated.

I would drain and flush it out, and fire it up and see what you have... IF everything seems ok, run it for about a week and re-check everything..... You might spring for a contribution test at a competent shop and a couple of oil samples at 1K intervals... .

 

[TCDiesel]

Is this a safe thing to be doing? The out put psi of the CP3 is extremely high. How do you do this safely?

It won't build Pressure...

 

[SRehberg]

Thanks for the information on the CP3 pump. The truck had been running at highway speed but unloaded. To go 40 miles before running rough, there must have been enough diesel to partiallly lubricate but probably not enough for protection. Otherwise it seems with a higher concentration of gas, the truck would have stalled right away which might have been better.

 

[AMcCormick]

It won't build Pressure...

if you crank the engine over would it not build psi? I have wondered about bleeding the high pressure side of the pump. when I installed the AD I bleed the supply line to the CP3. when I did the bag of parts CP3 kit I. I. said no need to bleed the system? Does the air just get pushed through?

 

[TCDiesel]

The injectors are the pressure regulators high side ,their is a IR valve that controls the internal pressure of the CP3 low side. Yes on the air.

 

[cerberusiam]

if you crank the engine over would it not build psi? I have wondered about bleeding the high pressure side of the pump. when I installed the AD I bleed the supply line to the CP3. when I did the bag of parts CP3 kit I. I. said no need to bleed the system? Does the air just get pushed through?

The CP-3 just pumps the fuel, the rail containing it and the injectors back stopping the flo wis where you get pressure. Other than the orfice in the high pressure cylinders out of the pump there is not much pressure there.



The Bosch HPCR is a self bleeding system. The CP-3 bleeds air thru the COV if any is present. Until the case pressure comes up the fuel doesn't even get pushed thru the FCA.



The injector circuit bleeds down any pressure or air as soon as the key is turned on. Theoretically, if yoiu have any amount of air in the rail there are other problems and the engine is simply not going to start as it will never build pressure.