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low on boost
THought I post here also, going on vacation tommorrow and would like to get this resolved, thanks for the help
Join Date: Apr 2005
Posts: 12
need a little help
Hey guy's, need a little help, 2002 auto, with gauges,Smarty on #5 from one day to the next starting to make about 4 psi less on the boost. Going down the highway was normaly 7-8 psi and about 700 F now only seems to do around 4 0r 5 psi, temperatures about the same.
Temperatures seem normal to me, maybe a little higher on accelaration, but settle right on down to normal, only 4 psi less boost.
I thought boost leak, removed and inspected all boots, only one with a little damage is pass. side from the intercooler from rubbing on the fender, however not al the way through, pipes are nice and clean,
Reassembled everything and pressuretested to 30 psi, can not find any leaks in the whole induction system, checked horn, all boots and around turbo checked with soap and water, tight as can be.
Checked wastgate, seems to operate normal, snaps shut and moves freely, opens up at 20 psi on the gauge. cant think of what to do next, thought maybe a gauge failure but it seems to do alright , wastgate opens right at 20 psi, anybody have any other suggestions??/
Thanks for the help Pete
PS no codes besides 1693 and 0620 (J hook on turbo), fuel pressure good, never below 12 psi (vulcan), truck does not seem to be low on power
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2002 2500 QC shorty 4x4 auto 3.55 110000 miles Isspro pyro, boost and FP on the pillar, Tranny temp in the cuby hole, rv275's, Smarty, 4 inch Exaust, Airdog, Kore Recon kit, SS adjustable trackbar and Steering stabilizer 3 1/4 turn steering box, Goerend tranny, power towing mirrors.
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