Misleading BPV info

Phil Rose pjrose at frontiernet.net
Thu Jun 26 18:29:54 EDT 2003

At 3:01 PM -0400 6/26/03, Chewy4000 at aol.com wrote:
>Ive been having a problem here for a while now.
>After doing the broken pin on the flywhell, timing and the rest of
>the comon parts, im loosing boost bigtime.
>The car idles perfect and sounds normal but coming out of first gear
>most of the time I get the full IA III+ 22+- psi on the vdo and 1.8
>on the dig display. Shift to 2 3 and 4 and it backs down to 12psi or
>1.4 on the dash.
>The bpv im using is fairly new since I thought I was leaking from it
>a while ago.
>I have 2 valves in my hand one is 108 and the other is 106 on them.
>Should the small vac line be facing front or top?
>What else could it be if its not the BPV.

I don't know what to make of those numbers.  Can you not ever get
anything above 1.4 bar except in 1st gear? That is poor. Doesn't seem
like a BPV issue, though.

Have you done any "standard" testing of maximum boost? The "official"
test (at least for the stock '91 200q) is done in 4th gear with WOT
applied below 2K and maximum boost recorded at 3000 RPM. You oughta
be able to see maximum (22 psi, for you) by about 3K. Helps to do the
test on a slide uphill grade--or is that cheating? :)

Did you replace the vac hose (or verify that it's intact) when you
installed the new BPV? Vac hose faces forward!!!


>Any info would help, its getting too hot now to be under 97+f here.
>Newark NJ
>200q20v mailing list
>200q20v at audifans.com


Phil Rose				Rochester, NY USA
'91 200q	(140K, Lago blue)
'91 200q   (64K, Tornado red)			mailto:pjrose at frontiernet.net

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