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Old 10-03-2009, 06:12 PM   #1
greatwaster
 
Join Date: Feb 2009
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Default Losing boost in 4th gear?
I have a 2001 GT (Vortech v-2) and I can getting 5-6psi in 2nd gear, 6-7psi in 3rd, and only 4psi in 4th. My question is: what controls the boost and why am I losing boost in 4th gear? Is this controlled by PCM? If it matters - my supporting mods are listed below:

TX-pipe, CAI, Trickflow intake, 93mm MAF, Focus fuel pump, Mafia extender, Vortec SQ V2, sct ship, custom tune.
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Old 10-04-2009, 02:38 AM   #2
luckythirteen13
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boost is controlled by the pulley/belt setup. only two ways to loose boost, a leak or belt slippage.
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