Vp44 transistor replacement

[Dirtworks]

New to this great forum. Just wondering if anybody knows of anybody that has had long term success after replacing the transistor in their vp44 module??? I am referring to the “injector pump fuel valve” drive transistor that overheats melting its connection.

Anyone know what the original transistor was that Bosch used?

If so please let us know what transistor replacement you used?

Did you solder or use an adhesive to secure and provide the necessary heat transfer?

Thanks, Gary

 

[IBMobile]

I look in to it a few years back.  Some people in Europe were doing it for the VW diesels that had a Bosch VP44 type injection pump but I didn't understand the language nor where they got the new transistors from.

[Mopar1973Man]

Welcome to the website @Dirtworks ...

 

I see you got your post going. The ones you might try... These are our Europian members maybe they would know.

@wil440

@Ronniemx3

@AlpineRAM

@Tiller

[CUMMINSDIESELPWR]

http://www.digital-kaos.co.uk/forums/showthread.php/73680-Bosch-VP30-VP44-injection-pump-repair-solution/page7

 

 

https://www.westfloridacomponents.com/T143PE08/IRFZ44N+IRFZ44+N+49A+55V+Transistor+MosFET+International+Rectifer.html

 

49 amp 55v

 

If i ever had to replace a pump again ill keep the core and was contemplating doing the transistor replacement and using a non conductive thin oil being pumped through a cpu computer radiator with peltiers in order to ensure the electronics housed on the vp stay cool. as we all know the heat kills these and mosfet transistors generate a sh!t ton of heat which cant go anywhere else but the housing of the pump and which is cooled by the overflow of fuel through it.  thus why having psi over 14 to push the overflow valve open and getting flow through is mandatory.

 

 

 

this video lists this transistor. 55v 42amp

 

https://www.amazon.com/5PCS-IRLR2905TRPBF-MOSFET-N-CH-IRLR2905/dp/B01G0QHVQS/ref=as_li_ss_tl?ie=UTF8&qid=1509288828&sr=8-1&keywords=irlr2905&linkCode=sl1&tag=amp036-20&linkId=8cbb278a6229b5759f168da394f3c19d

 

 

 

this vid lists this transistor, 41amp 55v as well

 

https://www.digikey.com/product-detail/en/infineon-technologies/IRLU2905/IRLU2905-ND/305417

i am confident that i could do this repair easily. i have done micro soldering for years

 

what i am thinking is this is the driver that provides current to the plunger for the injector plate or something like that. makes sense that an electromagnet would need a lot of power to hold up against high psi injection system mechanism

Edited August 20, 2018 by CUMMINSDIESELPWR

[AlpineRAM]

I seem to be late for the party

 

For  the 4cyl version in English

https://vrcustoms.wordpress.com/2015/05/18/vp-44-electronic-module-repair-opel-2-0-dti-x20dtly20dtl/

 

and here

 

Edited August 20, 2018 by AlpineRAM

[wil440]

And I'm in Canada at the moment so no use, I do use a good diesel shop for work I'll see what they say when back

[CUMMINSDIESELPWR]

11 hours ago, AlpineRAM said:

I seem to be late for the party

 

For  the 4cyl version in English

https://vrcustoms.wordpress.com/2015/05/18/vp-44-electronic-module-repair-opel-2-0-dti-x20dtly20dtl/

 

and here

 

 

 

that is a good write up of where the wires go and such, but man that soldering job is hideous!!!  lol

 

something like this requires a micro tip soldergun to be precise and clean.

 

soldering the transistor to the casing is good to use as a heatsync

 

 

it also looks like the vp44 housing can support a 4 port rotor head and the 6 port rotor head

 

 

i would also be willing to do this repair on a known bad pump for someone free and send back to see if it works (for the good of the cummins community).  any takers?

Edited August 20, 2018 by CUMMINSDIESELPWR

[Dirtworks]

Figured better do a quick check on my “fuel metering solenoid”

before replacing the transister that drives it. Used the 2 intake heaters wired together in parallel 

as a current sink in series with a headlight bulb ,15A fuse and the removed solenoid. The solenoid seems to operate fine with 12v applied. Still waiting for the transister. Thanks for all the input 

guys.

[CUMMINSDIESELPWR]

keep us posted!

Edited September 12, 2018 by JAG1