Thu Jan 30 08:22:13 1997
- Message No. 327
From: Stefan Loth
Subject: Fuel pump
Hi to everybody,
I planned to install during the winter season a time relais fro the fuel
pump to get rid of the coold start problems in the next season. So I
have taken a closer look to the wiring diagram of the AT, and also of a
FZR 1000 to get a comparison of the different way's the fuel pumps are
connected.
At this point I will describe the diferences I found out, and ask my
question to somebody who is more expirienced with the bike cabling.
On the FZR the fuel pump will start to pump as soon as ignition is
switched on. When the preasure in the carburator is high enough (this
will be controlled by a preasure switch), the pump will be switched of
as long as the preasure is high enough.
Now to the AT-diagram:
Here you have also the fuel pump and the preasure switch (and the CDI
black box??).
The fuel pump is connected on one side directly to ground (G). The 2nd
cable (+12V (Bl/Bu)) is going to the switch I mentioned above. On this
switch are 2 more cables (Bl/R and Bl/Y).
(Bl/R) is connected to fuse "D" in the fuse box and also the the
start/stop switch. From the other side of the start/stop switch it is
going to several points on the diagram. (Bl/Y) is going to the CDI.
The question now, does somebody know what the CDI does?
My idea is to connect the preasure switch directly to the ignition. As
soon as you turn the key, the fuel pump is running and contolled by the
preasure switch (same as FZR 1000). So you do not need a time relais.
Is somebody expirienced enough, to tell me what functions are in the
CDI, and what will happen (?) when the conntection for the fuel pump
will be removed from the CDI? Now the preasure switch is connectd with 3
wieres.
If the switch is working in the way I think, (open/close contact) there
are only 2 wires nessesary. (+12V) are going into the switch, from there
the (+12V) will be switched to the fuel pump. The connection to ground
is still existing.
The letters in brackets are the letters, that I have taken out from the
"Werkstatthanbuch AT ab BJ '90"
I leave the country tomorrow (Friday 31/01) for a 3 week vacation
(thanks god, it's vacation time, but unfortunaly witout my bike). So if
somebody has any ideas or comments to that, I' able to respond at the
end of February.
Best regards to all,
Stefan
--
|- Stefan Loth -|
|- Veldhauser Str. 199, D-48527 Nordhorn -|
|- 0172-93 44 985 -|
|- Email: stefan.loth@citicorp.com -|
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