[200q20v] soft boost?

Brett Dikeman brett at cloud9.net
Tue Oct 2 15:32:11 EDT 2001

At 1:43 PM -0400 10/2/01, Beer, Jerald wrote:
>   Just for grins, I disconnected the WGFV. Interestingly, the car will only
>pull about 10psi, and is sluggish to get there. Normally pulls 21-22 peak,
>15-16 @ 6,000). Feels like the old TBV hose is cracked, which it is
>not(visual inspection, behind heat shield too). Car has k24/26 from 2B,
>older IA3 chip, 2.5 PT and T-P WG spring. Car reads 18in Hg at warm idle so
>I don't think vacuum leak. No apparent boost leak (no sound, MM hose one
>year old, lower intercooler hose replaced 6 months ago, recent Bosch 108 TBV
>installed). Is this an anomoly because of the slightly bigger turbo, or is
>there something wrong? BTW, no codes showing up. TIA

Nothing is wrong; the WGFV is fail-safe.  No power means the 
wastegate is fully open; it takes cycling to close it and hence raise 
boost.  The turbo will still develop a minimum amount of boost with 
the WGFV off; I believe on stock 200q20v's, its about 1.3 bar(one of 
the classic signs of either WGFV failure, multifunction temperature 
sensor failure, or an actual overheat problem.)

Brett Dikeman
brett at cloud9.[nospam]net

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