Bosch VP30 VP44 injection pump repair solution

**robert1232** · 10th December, 2019, 07:47 AM

is not for fix
u need chcange all

Originally Posted by molnarp

Thanks! What is the type? How can i replace?

**molnarp** · 10th December, 2019, 11:36 AM

do you know the type

**volorucinski** · 10th December, 2019, 08:44 PM

It can be changed. And it works. Use the search button on this thread and you will find the answer.
Btw, that component acts like beeing in shortcircuit? Do you have the 5volt present on iwz sensor pins 1,2?

**aktifland** · 11th December, 2019, 02:50 PM

thank you so much

**volorucinski** · 11th December, 2019, 10:12 PM

You might use the Thanks button for these guys that helped you...

**janusz21** · 12th December, 2019, 10:32 PM

hi i'm looking for a best transistor for psg16
has anyone tested 2905 in psg16

**volorucinski** · 13th December, 2019, 07:27 AM

Always worked the 2905.but needs to be bought from a good brand name like Farnell, not chineese.

**Leordean** · 15th December, 2019, 09:53 PM

Tiene que ser irlr2905z,no vale cualquier irlr2905pbf,es porque tiene otra rexistencia en ohm.Miren sus valores .el 2905z tiene. 13.Ohm,_110w disipacion del calor y el 2905pbf tiene 0,02calor_110w disipacion del calor ,o sea que su resistencia interna es muy débil. El 3705z tiene 8.Ohm _130w disipacin del calor

**volorucinski** · 15th December, 2019, 10:35 PM

@ Leordean
Internal resistance? Thru what conditions and parrametters? What about soldering compound resistance, or how well did you solder it to dissipate propperly the heat, what about the valve's internal resistance when nobody cleans it, or measure it, what about the valve wires that have been cut and connected by turning them over instead of soldering?
Can be auilr, lr, ilr ect z, zpbf, pbf ect... With or without that antiparallel diode...We are talking about mOhms, but nobody is asking hisself of the current, or thermal dissipation and the mosfet's internal resistance in different stages (at cold, at idle, at hot, at maximum current absorbtion when the valve is blocked inside with dirt or has mechanical wearing or having shortcircuited wounds in valve's coil...)...
So, if you think is about that z, not pbf... I am asking you, kindly: Can you tell me, did you read only the specification of the reseller, or did you take a look on the producer's charts and graffics for those two 2905s?

**Leordean** · 16th December, 2019, 07:36 AM

Pues segun el productor (Kersemi Electronic CO.,LTD,,,,resulta eso lo que dije yo antes ,ahora lo que dices tu de los otros componentes de la bomba inyectora es verdad y te doy la razon .No tiene sentido cambiar un transistor si no se hace una revision de lod otros componentes enumerados por ti,el problema mio ha sido siempre las soldaduras con estaño, casi nunca resisten a las vibraciones y casi siempre ha resultado que tenia que repasarlos otraves y por esto me decidi no cambiar mas los transistores, si es caso cambio es sensor de angulo y temperatura o repaso el condesator del sensor y nada mas ,hoy en dia con 300€ encuentras bombas por cualquier lado les codificas de nuevo si hace falta como el (psg16) y nada mas

**volorucinski** · 16th December, 2019, 08:38 AM

el problema mio ha sido siempre las soldaduras con estaño, casi nunca resisten a las vibraciones y casi siempre ha resultado que tenia que repasarlos otraves y por esto me decidi no cambiar mas los transistores.

The problem is not the vibration. Is the mosfet's thermal dissipation. It's heating in normal labour conditions anyway! On Youtube there are a lot of "soldering 2905" tutorials. So, if you clean the pad and solder the mosfet with even an ordinary 60/40 soldering compound, it's a 30minute job done. But nobody cleans the dirt inside the pump, nor cleaning the fuel pipes, the filter or the fuel tank. Nobody checks propperly the electrovalves, the advance piston or hydraulic head...
Conclusion: even if you solder the mosfet to last forever, it will be overheated and burned again - because on a stucked pump the mosfet will draw the maximal current to actuate the valve in rough condition and it burns again

TO THOSE OF YOU THAT ARE THINKING ERRONATELY AND FOR YOU, ALL: DO YOU EXPECT TO HAVE A NEW CAR BY CHANGING A TRANSISTOR, ONLY? If yes, then take it to the scrapyard before of asking somebody to solder a transistor on your pump!

POST EDIT: I might ask a BIG LIKE for this post!

**Leordean** · 21st December, 2019, 02:47 AM

El problema siempre va estar en el diesel de baja calidad, yo he cambiado unas decenas de ecu-spsg5-psg16) y me encontrado solo con tres bombas inyectoras bloquedas por el piston de avance,(p1220) que me obligó cambiar la bomba entera ,los demas iba haciendo la revision de los cables de la valvula y me ha ido bien ,es verdad que las revoluviones ccambian de tiempo dado que seguramente las bombas estaban sucias por dentro pero con una buena limpieza iba reduciendo del desfaze .El problema con estas bomba consiste segun yo ,que como la mayoria de la gente que todavia usan estos coche antiguos son gente pobre, siempre buscara el diesel mas barato y siempre va ha buscar un cambio de bomba inyectora por necesidad .Casi nunca no va ha comprar un limpia inyectores para hecharlo en el deposito del diesel nada mas si lo hace el mecanico.