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#1
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Boost gauge
Recently installed a boost gauge on 87 T-type, snd every time i accelerate into boost, the boost gauge needle jumps around to the pressure of boost its given, but its to hard read it with it fluttering. Whats wrong snd why is it doing that?
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#2
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Re: Boost gauge
If everything is connected properly, it could be a few different things:
- Leak in the gauge lines - Leaking head gasket - Leak in the upper manifold - Leak in the vales, rings, etc. Boost should always be smooth. If it is not, there is a good reason. Check the guage lines and connections, then check engine compression on each cylinder.
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Scott Keller - GNTTYPE Founder & Moderator
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#3
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Re: Boost gauge
Ok, thanks. Hope its the boost gauge connection
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#4
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Re: Boost gauge
It is unlikely but you could have a guage that's overly sensitive. I've got a vacuum guage that is very sensitive and flutters like crazy. Works good for diagnosis but I don't want to use it for driving around.
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New here but not new to Buicks. |
#5
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Re: Boost gauge
Another possibility is a weak or failing diaphragm in the waste gate actuator. Could be not controlling boost at the limit.
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Ken Mosher 1987 GN original owner 650+ HP Black 2015 BMW 328xi XDrive wagon 2012 Volkswagen Tiguan (the Tig!) Night Blue Met (sold) 2006 Trailblazer SS Red Jewel Tint 395 HP AWD (sold) 2014 Silverado LTZ Crew 4WD 2012 Honda VFR 1200F Tahitian Blue (sold) 2015 BMW S1000R Racing Red 2013 Honda CBR500R Red (wife's bike) 2014 Triumph Bonneville T100 2003 Harley Davidson V Rod Anniversary Edition |
#6
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Re: Boost gauge
Ok, who do i tell if its weak?
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#7
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Re: Boost gauge
You can bench test the actuator with some compressed air and see if it is leaking...
__________________
Ken Mosher 1987 GN original owner 650+ HP Black 2015 BMW 328xi XDrive wagon 2012 Volkswagen Tiguan (the Tig!) Night Blue Met (sold) 2006 Trailblazer SS Red Jewel Tint 395 HP AWD (sold) 2014 Silverado LTZ Crew 4WD 2012 Honda VFR 1200F Tahitian Blue (sold) 2015 BMW S1000R Racing Red 2013 Honda CBR500R Red (wife's bike) 2014 Triumph Bonneville T100 2003 Harley Davidson V Rod Anniversary Edition |
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