Status update:
We found a small problem with the one-way valve theory. It works...from the 1-2
shift...but pressure gets held up in the tube between the MAP and the
check-valve. We're now looking into installing one more check-valve in between
the MAP and the primary valve to release pressure.
More testing after I finish my lunch...
- Bernd
> >
> > Hehehehe...
> >
> > First off, thank you to Bruce Bridges for listening to my theory and
> > giving
> > me some other suggestions to try!!
> >
> > Now, here's the scoop:
> >
> > I was experiencing (with the 9# pulley) some erratic part-throttle
> > (under
> > 3+psi of boost) surging. When I decided to hook up my scanner and
> > drive it
> > around (with a buddy to watch the MAP readings) I found that the
> > MAP, under
> > boost, was registering 30+"hg. NOT GOOD!!
> >
> > Soooo...going from some old experiences with Fords, I decided to
> > install a
> > one-way check valve on the vacuum line from the TB to the MAP
> > sensor. (This
> > device is found on most 76-88 Fords on the Distributor...be careful
> > though,
> > some are metered and others are just open and shut.) Now, under
> > boost, the
> > MAP shows 0" instead of 30+" and the part throttle/boost problem is
> > gone.
> > So much for reprogramming the computer...$600 vs. $1.99. ;)
> >
> > Here's the P/N: Borg-Warner - #EC601 Check Valve (You'll need some
> > vacuum
> > hose to extend the line from the TB to the MAP.) I'm also working
> > on a MAP
> > relocation bracket but don't know where I want to put it yet...but I
> > need to
> > keep it as close to the TB as possible.
> >
> > Further drivability testing is required so don't go out to your
> > local
> > PepBoys just because I wrote this. I'll have better results in
> > about a
> > week. (And NO...I didn't reset the computer...I didn't want to.)
> >
> > - Bernd
> >
> >
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This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:57:10 EDT