Help with choosing correct fuel pump!

Hi,

I am doing a restoration project on my MK1 Cabriolet. From the help of my mechanic he removed the fuel pump underneath car, as we are having it replaced.

Before removing the old pump, I bought a new one. As my car is a 2H Digifant I bought the fuel pump with the parts number: 867 906 091
I bought the pump trusting the chart/catalog beneath - number 40.




When the pump was removed from the car, it looked quite different - might seem it has been replaced before.
Does anyone know what the correct pump is? And if I have bought the correct one, the connectors seems to be different how do I solve that?



Cheers!

Digifant is the one on the left 45 psi.  The one on the right is CIS and 75 PSI.

That was my assumptions aswell.

I am guessing the previous owner has done his own repairs, installing the incorrect pump.
Any ideas on reconnecting/re-wiring to the new/old pump system?

The reason for changing the pump is a part of diagnosing the fuel system of the car. It seems to be getting to much fuel, and the air-to-fuel ratio seems to be incorrect as well.

Repairs/upgrades that has been done:
- New O2-sensor
- New knock sensor
- Complete new exhaust system
- New idle stabilizer valve
- New fuel filter
- New oil temperature sensor

Upgrades/repairs to be done:
- New air mass meter
- New fuel injectors
- New vacuum pressure sensor

Am I missing anything? Is there any other parts affecting the reason why the car is getting to much fuel? After running for a little while, the exhaust is creating black smoke.
 

Well the 75 psi at the fuel rail was too much, the Fuel pressure regulator may have been overwhelmed .

Well I would start with the blue CTS sensor on the water outlet flange.

If it was me I would say get rid of those plastic parts as the 16V CTS sensor is more resilient less prone to go south.

See the following thread:
I still hate plastic parts, but thanks Tolusina. | VW Vortex - Volkswagen Forum

Great, thanks!

Do you have a parts number for the CTS?


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https://www.cascadegerman.com/product/025906041a/

Hi again,

Briano1234   - perhaps you could help me a bit more. As I am now going to replace the fuel pump with a new one, I need a new electrical connector as the old one had O-fittings.
Do you know what connector will fit?

I have tried finding the correct one online but haven't been successfull.



Cheers!

No I don't have the connector part number. If you had mentioned this about 4 weeks ago I would of cut the one off of my Green Cabby as I converted it to a single in-tank pump and taped off that connector.

Hi all, picking this up this thread again. Finally got to install the new pump, which seems to rub quite well. Also have changed fuel injectors and air mass meter.

I mentioned earlier in this thread that the car is producing a lot black smoke, indicating something wrong with air/fuel mixture. This is still the case… But talked to my mechanic who said that this seems to stop when he is disconnecting, the lambda probe/O2-sensor. Do you guys think this is the culprit? Any other ideas?

Cheers!