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Discussion Starter · #1 ·
92 22re 4cyldr. muffling sound coming from top of engine during acceleration. could this be a bad exhaust manifold gasket?
 

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Cressida nut
91 Pickup (Hilux)2wd
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a muffling sound? could you describe it differently?

yes, could be the manifold. My engine makes a lot of noise from exhaust leaks when you step on it.
 

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Lemon Jelly Donut
many things
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could it be, maybe a "fluttering" sound, kinda like a quiet "Jake Brake"?
 

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Discussion Starter · #4 ·
I does kind a sound like fluttering..the sound is coming from the top of the engine. not from the exhaust manifold..it really gets loud when driving up hill.
 

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Lemon Jelly Donut
many things
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Just a though, maybe the "PAIR valve", see page EG1–96 of a 93 FSM (google it). I know before I took my new to me 3vze of the lot, it had a flutter sound. I found the screws holding the PAIR valve inlet/cover, was missing screw. I installed some that fit, and tighttened the cover/inlet by hand (it is plastic), and no more flutter. The sound reminded me of a piece of plastic stuck in a vacuum cleaner hose.
 
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