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<DIV><FONT size=2 face=Arial>I have the one which is an E unit that came with my
73 SB . I also have one that came off a 72 yet it does not have the tag on it .
It does have the ground wire tab just like the E unit . I used it once to see it
might change what was rich running that turned out to be low voltage from a bad
regulator. </FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial> All is has is a white paper tag right inside
just ahead to the ECU connector with this number printed on it <SPAN
class=postbody><FONT size=3
face="Times New Roman">725734.</FONT></SPAN></FONT></DIV>
<DIV><FONT size=2 face=Arial><SPAN class=postbody></SPAN></FONT> </DIV>
<DIV><FONT size=2 face=Arial><SPAN class=postbody> The only difference
between the 73 Calif FI SB I have and the 72 was the 72 did not have the EGR and
no plugs in the harness for it . It did have the EGR relay plus an older type
cold start valve and the three port vacuum valve to the dual port dist vacuum
advance and all three were mounted on the MPS bracket . It had the AH dist with
the proper vacuum advance 73 had the AH single . </SPAN></FONT></DIV>
<DIV><FONT size=2 face=Arial><SPAN class=postbody></SPAN></FONT> </DIV>
<DIV><FONT size=2 face=Arial><SPAN class=postbody> Both had the PCV setup
and the IAD's the 72 had no pipe bolted on top for the EGR and on extra vacuum
advance port for the like AG dist. The MPS on the 72 looked new and is VW # 311
906 051B. I need to look for the Bosch # I know it's on it . It had the ground
tab as did the 311 906 021E that screwed to gether rather than rivets.
</SPAN></FONT></DIV>
<DIV><FONT size=2 face=Arial><SPAN class=postbody></SPAN></FONT> </DIV>
<DIV><FONT size=2 face=Arial><SPAN class=postbody> Every thing else was the
same on both systems . </SPAN></FONT></DIV>
<DIV><FONT size=2 face=Arial><SPAN class=postbody></SPAN></FONT> </DIV>
<DIV><FONT size=2 face=Arial><SPAN class=postbody> I have no history of the
PO of either car so since the MPS on the 72 was new perhaps the entire
bracket was removed for another car and it them had the EGR relay and old cold
start valve on it. </SPAN></FONT></DIV>
<DIV><FONT size=2 face=Arial><SPAN class=postbody></SPAN></FONT> </DIV>
<DIV><FONT size=2 face=Arial><SPAN class=postbody> I have no idea where VW
mounted the three way vacuum valve # 113906283 on the dual vacuum advance unit
of why the 022906047A which from phot's looks like an older type CSV why this of
the EGR relay where there at all. </SPAN></FONT></DIV>
<DIV><FONT size=2 face=Arial><SPAN class=postbody></SPAN></FONT> </DIV>
<DIV><FONT size=2 face=Arial><SPAN class=postbody> There's my info I have .
the 73 had everything on it that was stock that it should have. Even the
ERG valve and it's rusted pipe and filter that never worked. With this how would
I know if the ECU from the 72 is compatable for a 73 ? All I know is it
worked the same as the known E unit when I tired it many years ago. Just hoping
I have a spare. My E unit works fine. </SPAN></FONT></DIV>
<DIV><FONT size=2 face=Arial><SPAN class=postbody></SPAN></FONT> </DIV>
<DIV><FONT size=2 face=Arial><SPAN class=postbody> Back then in 85 I was
not up on year changes and only had the Bentley and a Haynes so I plugged the
ECU in and used the newer MPS and if ran great . I can't recall how long the 72
ECU was on this car . It also ran the same with either MPS back then.
</SPAN></FONT></DIV>
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