No boost
Thread Starter
Teching In
Joined: Jun 2023
Posts: 3
Likes: 0
No boost I have a 5.3 with 88mm fis turbo not building boost. I tracked issue to blow off valve opening. I have found that at idle I have about 13-14 inhg in the intake and as I open throttle vacuum is increased to 19-20 inhg which is causing blow off valve to open. Any idea as to why vacuum would be increasing
Stupid question, the reference line is hooked up to the lower fitting below the diaphragm, right?
If its hooked up to the dome fitting then it would open with vacuum, if its hooked to the lower than vacuum should hold it closed and pressure should open it.
If its hooked up to the dome fitting then it would open with vacuum, if its hooked to the lower than vacuum should hold it closed and pressure should open it.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'
Brett Foote
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
