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use a plumbers propane torch with a hose. turn on the propane. (don't light it of course) and move the hose close to all the fittings, vac hoses, throttle body etc, if the motor races up there is the vac leakHow do I locate a vacuum leak on the L98 if I have one?
Glenn
i have damaged the plenum gaskets a few times in my day.. sucks air in the bottom.. did you check the iac? the pintle sticks if you tried to clean the TB without removing the IAC. all that junk washes down in the little hole behind the Blades.. Don't forget the IAC is a controlled vac leak..and it must work properly for the engine to idle correctly.Yep, used torque sequence. The problem was that the
runners fit pretty tight putting the plenum in. Afraid
I may have damaged the gasket.
May have to study this to make a tool to spread the runners just a little to install the plenum.
I really don't think it is the injectors leaking , if it was I would think I would have a fuel leak also.
Glenn
How do I locate a vacuum leak on the L98 if I have one?
Glenn
I tried the propane torch trick by myself and couldn't hear
any diff in engine rpm. With my exhaust I would think I would hear it. Also tried carb cleaner, nothing. I do now have this odd buzz just after the engine stops.Enough vacuum in the
plenum that I would here the leak?
Glenn
Yep, used torque sequence. The problem was that the
runners fit pretty tight putting the plenum in. Afraid
I may have damaged the gasket.
May have to study this to make a tool to spread the runners just a little to install the plenum.
I really don't think it is the injectors leaking , if it was I would think I would have a fuel leak also.
Glenn
Is there a way that would work with an internal intake leak?
Glenn