DFI, Batch Fire, and other myths

[Clarence Wood]

Thank you Shannon!!
  I have all the material to make the unit!  One question: I assume that the timer was used on the pump, but, in any case, how long would you let the engine run for a 6 cylinder engine?  
  I guess I have another question: is it O2 safe?
  And another question: how big is the tank?

At 08:48 PM 1/24/99 -0500, you wrote:
>Clarence L.Snyder wrote:
>> 
>> Clarence Wood wrote:
>> >
>> >   Please give more information on "motor-vac".  How does it work?  How much does it cost?  Where do you get it?
>> >
>> > Thanks,
>> > Clarence
>> >
>> > At 06:40 PM 1/21/99 -0500, you wrote:
>> > (snip)>I don't know if it acts as a sponge or what, but the presence / absence
>> > >of carbon on the intake valves makes a SIGNIFICANT difference in
>> > >driveability. The 3.0 litre V6 in my aerostar had a BAD stumble off idle
>> > >when partly warmed up - to the point that on a cold day if I fired it up
>> > >and drove to the corner down the street it would invariably stall when
>> > >pulling away unless I floored it. Tried everything. Finally used a
>> > >"motor-vac" on it, which does an excellent job of decarbonizing - and
>> > >it's been perfect since.
>> > >
>> > >
>> It is a fuel system / engine cleaner unit that connects to the car and
>> draws a calibrated amount of fuel into  itself. You add a very
>> concentrated cleaner to the gas, which is then tun through the system,
>> from the filter forward under pressure. You run the engine through a
>> cycle with this beasy connected and the intake valves, cyls, lines, and
>> injectors are clean enough you couls eat off of them. I was a doubter
>> myself 'till my brother called me and said they needed a guinea pig for
>> the distributor to demonstrate the gizmo on - and knowing my AeroScare
>> was misbehaving, and he could not fix it.
>> Never know it was the same truck.
>> The unit is expensive - several thousand if I remember correctly, and my
>> brother has not bought one - yet. Apparently they are also "rotunda"
>> branded and sold to Ford dealers - and sold under several other brand
>> names. About the same size as an antifreeze recycler or bar fridge.
>
>Just to add a little to this, I used to do motor-vacs in the shop I
>worked in.  They worked great, but recommended price was about
>$80.00.  They are made by a co. owned by Snap-on.  Anyone interested
>can search on the web, there's a page for them somewhere.
>
>Now for the good stuff...  The special cleaner was similar to GM Top
>Engine Cleaner.  So similar that we saved a bundle by switching to
>it!  Concetration that seemed to work best was 1/2 can to 5 gals gas. 
>Machine was simple 12V pump, tank, mechanically adjustable pressure
>regulator, and timer.  So the DIY'ers can easily make one!  Hardest
>part is making hoses to connect to FI system.  If you play your cards
>right, the whole thing could be done for very little $$.  
>
>Shannen
>
>