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Vacume leak

redsnapper386

Regular Contributor
"guy's,i have a vacume lea

"guy's,i have a vacume leak that i cannot find.the carb check's good,and the intake as well.this is causing an irratic idle.also,at idle i get a whistle noise from the carb which is new.i can set the carb to spec,turn the motor off,and on restart it drops to 300-500 rpm.should i pull the intake anyway,and regasket.i have also re torqued the intake.what to do.1987 350,260 h.p.4-bbl quad,thuderbolt iv.thank,s."
 
post pics of your carb if you

post pics of your carb if you can all 4 sides.
Maybe your missing something that needs to be plugged
 
Is the choke pulloff diaphragm

Is the choke pulloff diaphragm connected to a vacuum nipple w/a short tube?
 
"yes,it has a short tube that

"yes,it has a short tube that is new.i am not set up to post any pics,but i will check it again,and do another vac test.i am about to put in another motor,this one is tired.thank's guy,s."
 
"Bet it isn't "new&#34

"Bet it isn't "new" and the OEM part....there may be a few around but they are hard to find. Most likely a fitting that isn't capped or a vacuum port in the baseplate that needs a pipe plug. If it is a rebuilt, could be the primary shafts leaking. The pics that BT requested sure would help."
 
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