Re: Fuel Vapor Purge Solenoid

From: Marty Galyean (mgalyean@acm.org)
Date: Sun Mar 11 2001 - 00:40:52 EST


I'm curious too. Weight reduction? When in doubt, rip it out?

And in working order, that 'stuff' keeps pressure from building in the tank. Hope you don't get in a tank rupturing accident at a
'peak pressure' point in your driving cycle ;-)

Drive Safe,
Marty

Batman wrote:
>
> So, I'm just gonna ask out of curiosity....The vapor purge solenoid is there to reduce fuel tank emissions, I doubt that there is really a gain to disconecting it, so what's the point of disconnecting it?
>
> -Batman
>
> --- Shane Moseley <smoseley@ix.netcom.com>
> > wrote:
> >fawcett@uism.bu.edu wrote:
> >
> >> Yeah it's a no maintenance thing but be careful you don't pull one of the tubes
> >> out... I did somehow and it set off the check engine light (MIL).
> >
> >I can't speak on the black box under truck thingy (cause mine is under the hood) but
> >if this is your charcoal cannister, it receives fumes or vapors that accumulate and
> >get pressurized by the fuel sloshing around in the gas tank.
> >
> >I pulled mine out along with all the vacuum hoses that connect it to the solenoid
> >(black thing on back of drivers side fuel rail). I also removed the line that teed
> >into the intake manifold full-vacuum port during my MPI install. This was at least
> >1.5 years ago if not 2+ years. The ONLY adverse effect that I have found is that if
> >you have a very full tank of gas and do alot of quick stops and hard launches, it
> >will cause the pressure to build up and will case the "Incorrect purge flow" MIL to
> >illuminate. Its only happened to me about 4 times in a LONG time. Since I always
> >have my scan tool and cable (connected fulltime 8) - I just turn it off. Believe it
> >or not - having it come on - and knowing how to cause it to come on - actually
> >HELPED me demo my scan tools ability to turn off the MIL. I didn't even have to
> >stop - open hood - and dink w/something....just did a few stop-n-gos w/a full
> >tank...
> >
> >No - I don't have to bow down to the smog lords 8). And you must leave the solenoid
> >electrical connection connected at all times (mines just hanging off the harness
> >back there somewhere) or you will get a permanent MIL.
> >
> >My $0.02 - hope it helps...
> >
> >Latr,
> >
> >Shane (2,021 DML messages to go 8( )
> >
> >--
> >'96 IndyRam-HisIndy-MPI/TB/Pulleys/AccelCoil/MPComp/HookerSuperComps/CompTAs
> >'96 IndyRam-HerIndy-numbered(#142)"Track Truck"
> >'74 Triple-Black Dodge Challenger Rallye 360 home-brew EFI R&D vehicle
> >'68 Black Corvette Convertible 427 (For Sale)
>
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