DFI, Batch Fire, and other myths

[Don.F.Broadus at ucm.com]

Motor vac was shown on shade tree mechanic last week. It is made by snap-on.
You disconnect your fuel and return line from the
 fuel rail connect them together so the fuel loops back to the tank. The
motor vac has its own gas tank and solvent tank, you set the pressure going
to the fuel rail.  

> -----Original Message-----
> From:	Clarence Wood [SMTP:clarencewood at centuryinter.net]
> Sent:	Friday, January 22, 1999 3:09 AM
> To:	diy_efi at efi332.eng.ohio-state.edu
> Subject:	Re: DFI, Batch Fire, and other myths
> 
>   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.
> >
> >