Bosch VP30 VP44 injection pump repair solution

**adidiaconu** · 19th September, 2011, 01:46 PM

pls let me see pictures!!

**Min2xx** · 19th September, 2011, 07:31 PM

I see any changes in hardware, it's makes by programing fuel pump maps ! How it, I don't know

**Shmortz** · 20th September, 2011, 01:01 PM

Hello, I want to replace the pump with the number 0470504003 (PSG5) with this number 0470504002 (PSG2), I have heard that the opposite is possible, is there someone who has done this?

**emilperijoc** · 21st September, 2011, 05:14 PM

mishu_b the only way to calibrate the pump it is on the special stand, I fix my and now at idle it consumes about 0.9 l/h insted of 0.6l/h

**Min2xx** · 21st September, 2011, 07:57 PM

Originally Posted by emilperijoc

mishu_b the only way to calibrate the pump it is on the special stand, I fix my and now at idle it consumes about 0.9 l/h insted of 0.6l/h

What is "special stand" and how it to do? What tool you use?

In "actual values" you must see "injection quantity", value from 3 to 9 mg/str, 8-9 and more value is not good, you will have "no power" and 3-5 mg/str is very good. It's on idle.

**kikimiki** · 22nd September, 2011, 08:39 AM

Originally Posted by Min2xx

What is "special stand" and how it to do? What tool you use?

In "actual values" you must see "injection quantity", value from 3 to 9 mg/str, 8-9 and more value is not good, you will have "no power" and 3-5 mg/str is very good. It's on idle.

This is the tool to reflash pump software.
Bosch - VPM 844

**elchip** · 29th September, 2011, 08:08 PM

When you ones program FW to blank VP pump you can not change any more ...

Here is picture maked by me , it is MCU VP44 and it is :
Intel 87C196ET it is OTP - one time programmable.
The VPP is 12.5V

photo VP44 MCU.jpg

Only what you can change is EEPROM data nothing else ...

Do not ask me about eeprom programing I will not ans-ware on request .

Regard's

**aktiv22** · 30th September, 2011, 08:16 AM

Originally Posted by elchip

When you ones program FW to blank VP pump you can not change any more ...

Here is picture maked by me , it is MCU VP44 and it is :
Intel 87C196ET it is OTP - one time programmable.
The VPP is 12.5V

photo VP44 MCU.jpg

Only what you can change is EEPROM data nothing else ...

Do not ask me about eeprom programing I will not ans-ware on request .

Regard's

what data is write in eeprom ?
the eeprom is 24c02?

**elchip** · 30th September, 2011, 11:33 AM

Originally Posted by aktiv22

what data is write in eeprom ?
the eeprom is 24c02?

Can you read ?

Do not ask me about eeprom programing I will not ans-ware on request .

**nicamarcos** · 30th September, 2011, 05:27 PM

Originally Posted by elchip

Can you read ?

Do not ask me about eeprom programing I will not ans-ware on request .

Hey why not

?, from who you learned this?

**aktiv22** · 1st October, 2011, 08:04 AM

Originally Posted by elchip

Can you read ?

Do not ask me about eeprom programing I will not ans-ware on request .

yes.
i read this 24c02 but i cannot write

**Min2xx** · 1st October, 2011, 10:57 PM

Originally Posted by aktiv22

yes.
i read this 24c02 but i cannot write

Please, explain for us, and post dump

**aktiv22** · 2nd October, 2011, 10:00 AM

Originally Posted by Min2xx

Please, explain for us, and post dump

this is the pictures

**Mrubbert** · 2nd October, 2011, 11:58 AM

Info from other forum:

You can use your VAUX-COM to communicate with the PSG5 pump. You have to make the wiring for yourself, since the communication pin is not connected to the wiring loom of the car.

The PSG5 pump has a 9 pins connector, and pin #9 is the K-Line.

So, you have to make an auxilary cable, with a simple 16 pin OBD connector, and you have to connect the pin #7 of the OBD connector, with the pin #9 of the PSG5 connector.

What we used to do, is to drill a hole on the plastic connector of the psg pump, and connect a wire to the pin #9 of the PSG pump.

Then, you can query the list of fault codes stored in the PSG5 pump.

But please note the following:

You cannot see any measuring blocks information, not even with the KTS software.

All you got is fault codes. By the way, here is the list, not too much.

00080 Fuel quantity solenoid valve, output stage error
00081 Fuel quantity solenoid valve, fault
00082 Angle sensor/IWZ system, fault
00083 Angle sensor/IWZ system, fault
00084 Control unit temp sensor, maximum exceeded
00085 Control unit temp sensor, not in range
00086 Battery voltage, not in range
00087 Timing device control, permanent control deviation
00088 Fuel-quantity solenoid valve, error
00089 Injection begin, error
00090 Speed signal, error
00091 Speed signal, error
00092 CAN-BUS, error
00093 CAN-BUS, error
00094 Selftest, error

And if you surely know, that the PSG pump is faulty, what are you going to do? You cannot repair that by yourself, because for repairing these, you need an EPS-815, or similar BOSCH special equipment.

Most of the time, the IWZ angle sensor, or the PSG control unit is, what causes the fault. Or there is some mechanical damage to the pump.

What I recommend you, is to send the PSG pump to a reliable diesel service center, where they can test the unit with the EPS-815.

Let's see, what they say. If they are telling you, that the pump is OK, then you have to find the problem in the car.

Hope this helps a bit.