Re: Professional Fuel Injection Cleaner Hookups

["David Teitelbaum" <jtrealty@xxxx>]

I would hesitate in using a fuel injector cleaning system on the 
Delorean. On a properly running car the fuel system is to a large 
extent self-cleaning as the fuel is constantly being pumped out of the 
tank, through the fuel filter to the mixture unit and back to the 
tank. Any contamination should wind up inside the fuel filter. The 
only area that is not recirculated is the injectors themselves and 
they can be removed easily to be cleaned. If you suspect any dirt has 
entered the system start by inspecting the fuel tank. If it is dirty 
clean it out. Next replace the fuel filter and if you want to know if 
the system was heavily contaminated cut the filter open. Be careful as 
it will still contain enough gas to be dangerous. Lastly if the system 
is still not clean remove the injectors and have them tested and 
cleaned. Modern fuels contain additives that will loosen and remove 
most organic contamination, the filter is for inorganic contamination 
and water. A pressure cleaning system could damage the fuel system by 
putting high pressures where they shouldn't be and some have a 
pulsating mode that can damage valves in the system. If you do use it 
you may see a lot of dirt come out but sometimes loosening it all at 
once can really be a bad thing! If you are having fuel system problems 
I suspect even after the system cleaning you will continue to have 
them and maybe even more. Try to troubleshoot the problem first before 
"shotgunning" it by having a "system cleaning". Many fuel system 
problems start in the fuel tank so that's where I would begin.
David Teitelbaum
vin 10757



--- In dmcnews@xxxxxxxxxxxxxxx, "Stragand, Dave" <dave.stragand@xxxx> 
wrote:
> Hi All,
> 
> I have a question on professional fuel injection cleaners, like the
> NAPA/Echlin universal system. In the instructions for Bosch 
K-Jetronic,
> they have instructions to hook the hose to the fuel inlet, plug the
> return port with the included plug, and disconnect the pump at the 
fuel
> pump connector.
> 
> My question is this: in their diagram, the fuel return only has one
> line shown -- the fuel return line. The return on the frequency 
valve
> is also connected to this port, so plugging the port would leave the
> return from the frequency valve disconnected. My thoughts are that 
this
> is not a good idea, and instead the return line should be left off 
and
> the frequency valve return connected back up to this port with a
> single-hose connector (a spare single hose connector from the main 
line
> will fit fine. Any thoughts on this?
> 
> Also, is it necessary to disconnect the pump at its connector, or 
would
> simply tripping the inertia switch be sufficient?
> 
> -Dave
> VIN #05927
> 
> 
> [Non-text portions of this message have been removed]