My car has started hissing at me.. It's a sound akin to blowing through a straw.. It gets louder with more power... Anyway, popped the hood and had a listen, it's even there at idle, and still got louder with revs and seemed to be coming from somewhere around the carb, but i couldnt feel any air escaping anywhere.. Im really bad at this kinda diagnostic stuff so hoping someone can help... No loss of performance either so im a bit befuddled on this one!

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Sounds like a Weber!!

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Bob Slattery
Duffman Says A Lot of Things - OH YEAH!!

Exhaust or intake manifold leak? If so you won't feel leaking of anything...

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Lillee - 1969 Morris Mini K

vacuum advance pipe.

hmmm.....sounds like it's sucking air IN. How is your idle?

Vacuum leak. you can hear the air being sucked in. Get a bottle of water and pour it around where the sound is and you will hear the difference. Then pull that bit off and replace the gasket or fix the pipe. Has the vac pipe from the distributor fallen off or broken?

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Chris

Everything I like is either
illegal, immoral or fattening.

wouja use water? castor oil is less potentially damaging

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Inconspicuously Conspicuous
Appreciation without Depreciation
forever chasing clearer skies...

Hmm.. Ok it shoulda been more obvious but when i went back for another look today it stuck out like a sore thumb... The crankcase ventilation pipe running from the rocker cover to the carb had come off at the carb end, hence the hissssssssssssssss... thanks for all ya help though..

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glad to hear. caster oil would make a huge mess, water kills the motor, engine start make the revs go up many differetn ways to check but all have the same result.