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Posted by: 3stewarts Jun 5 2018, 08:49 PM

Looking for manifold pressure sensor for my 74 2.0.
0 280 100 043
Ok if it doesn’t hold vacuum.
Not ok with open circuits.
I’m finding lots for the 1.7 and none for the 2.0
Are these things rare?

Have one on order from Mr. Bowlsby

Posted by: 914Sixer Jun 6 2018, 05:40 AM

Yes, they can be hard to find, nearly all will need a rebuild. Even rarer is the 037 for the 73 2.0

Posted by: 914 7T3 Jun 6 2018, 10:29 AM

Here are several from the same vendor on the Samba. I bought an 037 for my '73 a few months back from this vendor and will probably need to rebuild it.

https://www.thesamba.com/vw/classifieds/detail.php?id=1422956

https://www.thesamba.com/vw/classifieds/detail.php?id=1944337

https://www.thesamba.com/vw/classifieds/detail.php?id=1944338

Good luck in your search

Posted by: 3stewarts Jun 6 2018, 11:56 AM

QUOTE(914 7T3 @ Jun 6 2018, 11:29 AM)

Here are several from the same vendor on the Samba. I bought an 037 for my '73 a few months back from this vendor and will probably need to rebuild it.

https://www.thesamba.com/vw/classifieds/detail.php?id=1422956

https://www.thesamba.com/vw/classifieds/detail.php?id=1944337

https://www.thesamba.com/vw/classifieds/detail.php?id=1944338

Good luck in your search

Posted by: scallyk9 Jun 6 2018, 01:08 PM

I wouldn't buy one of these used when we have Jeff Bowlsby on this forum doing fantastic rebuilds of them. The one I purchased from Jeff about 6 months ago is functioning perfectly in my '74 LE. It is an -043 which seem to be harder to find.

Posted by: Jeff Bowlsby Jun 6 2018, 01:12 PM

I need to mention that good, rebuildable MPS cores in general are becoming more difficult to find.

I have not had any problem with coil discontinuity in the several hundred MPS I have come across, but that condition would obviously be problematic.

What I am sometimes seeing is heavy corrosion internal to the MPS and light corrosion occurring on the core 'plunger' and inner coil surfaces which intermittently causes the plunger to hang up and produce a rough signal. I am thinking that if the MPS is exposed to moist environments water or even water vapor is getting inside that cannot be seen until the MPS is opened up. So if you have some MPS in your stash - PLEASE - wrap them in plastic wrap to store them.

That, and finding core cases that can be made vacuum tight - finding leaky cases and other leak sources is very time consuming and sometimes a case is damaged beyond use.

Posted by: 3stewarts Jun 6 2018, 02:02 PM

As is my luck I have an open circuit in one of the coils. disassembled to inspect but cannot find the open. those coils have skinny wires! my housing is clean and serviceable and I have a new diaphragm to install but with an open coil.....