开云体育

Having other VW's, a 75 bus to be exact, I have been thru a good amount
of fuel line replacement. What makes many bus owners worry on bus fuel
lins are the very short hoses that connect the injectors to the rest of
the fuel line system. From the factory the injectors come with a short
(about 1") length of hose that has some kind of ferrule (like the crimp
thing) where the line meets the injector. Many just leave this short
line alone and that is a mistake. What should be done is to remove the
line and ferrule and replaced by new hose and the proper hose clamp.
This is the exact same repair the I am doing on my EV. Remove the crimp
thing and the old hose and replace them with new hose and clamps.

Just be sure to get the right hose and clamps. Good parts stores have
just what you need.

The injection system you describe from the 75 bus is not the injection
system on the EVs. The injectors are inserted into a fuel injection
rail. The rail is under constant pressure, the injectors just open up
via an electric implse...there are no fuel lines on the individual
injectors on the EV as in a flat 4 engine.

The problems are mainly in the return feed that goes to the fuel tank.
You should also be aware that the regular type of screw type of clamps
don't work very well in a fuel injection system as they loose their
grip over time.


Ric



gibbonsn-@... wrote:
original article:

Having other VW's, a 75 bus to be exact, I have been thru a good

amount

of fuel line replacement. What makes many bus owners worry on bus fuel
lins are the very short hoses that connect the injectors to the rest

of

the fuel line system. From the factory the injectors come with a short
(about 1") length of hose that has some kind of ferrule (like the

crimp

thing) where the line meets the injector. Many just leave this short
line alone and that is a mistake. What should be done is to remove the
line and ferrule and replaced by new hose and the proper hose clamp.
This is the exact same repair the I am doing on my EV. Remove the

crimp

thing and the old hose and replace them with new hose and clamps.

Just be sure to get the right hose and clamps. Good parts stores have
just what you need.

Yes, the two systems (75 to 93) are very much different but parts share
many functions. While the EV has a fuel rail that is much more reliable
then the lines and hoses on the bus they both have nearly the same fuel
pressure.

My point was that the metal ferulles used on the bus had given many
owners questions much the same as the metal crimp fittings on the EV.

Do you think the spring type clamps used in a few places on the EV
system are better then the high quality German (not just plane hose
clamps) hose clamps I have used on many other VW's?

It seems like the spring action of the spring clamps would maintain
pressure when used on a new hose. However, I replaced a coolant hose on
this EV some time ago and the factory spring clamps took quite a while
to seal the joint completly. Not too much a problem for coolant but
another matter for fuel!