70 cutlass vacuum diagram
#1
70 cutlass vacuum diagram
i have a 70 cutlass 350-4barrel all stock,on the intake manifold p/s there is a rod that sticks out where i assume 3 vacuum lines go, i bought the car from the original owner it runs good but i don't know where thtw vacuum lines go, its an a/c car, any help on a digram would be great, thanks
#2
i have a 70 cutlass 350-4barrel all stock,on the intake manifold p/s there is a rod that sticks out where i assume 3 vacuum lines go, i bought the car from the original owner it runs good but i don't know where thtw vacuum lines go, its an a/c car, any help on a digram would be great, thanks
#4
70 vacuum reply
thanks in advance,i didn't think a 1970 had any emissoin parts on them, the original owner kept it inspected till this month, just registered it last week, i don't know why his mechanic would leave 3 vacuum lines unplugged.it runs rough at idle, but smooths out when you give it gas.
#5
thanks in advance,i didn't think a 1970 had any emissoin parts on them, the original owner kept it inspected till this month, just registered it last week, i don't know why his mechanic would leave 3 vacuum lines unplugged.it runs rough at idle, but smooths out when you give it gas.
Best thing at this point is to plug off the outlets for the three vacuum lines, and give that a try.
#7
The vacuum supply to the valve was probably moved to the advance canister, the other two hoses removed, and the manifold plugged. If so, the car would run the same as it did before. If the vacuum source was changed from ported, to manifold, it would not run as well.
The correct configuration should be:
Give it a tuneup, per factory specs, starting with a liberal (can I say that, here) application of carb cleaner (lacquer thinner) down the carb.
Norm
#9
You can always spray the hell out of it with starting fluid. If the idle changes then you know you have a vacuum leak.
Or if you smoke you can take a BIG OL' HIT... er I mean... DRAG and then blow the smoke into one of the vacuum lines with the engine off and see where the smoke pours out of your intake / carburetor. (NOTE: this might not work too well since most people couldn't inhale enough smoke to make it noticable when you blow it into an engine). If you are really intent on using the smoke idea then there is a machine called a Vac U Tec that does that with a little electric heating element that burns STUFF to make smoke. They are fun to use.
Or if you smoke you can take a BIG OL' HIT... er I mean... DRAG and then blow the smoke into one of the vacuum lines with the engine off and see where the smoke pours out of your intake / carburetor. (NOTE: this might not work too well since most people couldn't inhale enough smoke to make it noticable when you blow it into an engine). If you are really intent on using the smoke idea then there is a machine called a Vac U Tec that does that with a little electric heating element that burns STUFF to make smoke. They are fun to use.
#10
thanks alot the car runs smooth, when you give it gas, i changed the plugs,cap,rotor,oil,and filter, put some lead additive in it and super, now it doesn't ping anymore, it doesn't blow any smoke when its staretd,the original owner only put 60 miles on it since last dec,the choke doesn't work theres a place in phila, that will rebuild the original carb, and tune it for $250,(take it off and put it on) he's been around forever, i''m gonna try taking to him next week, i just sold my 88 cutlass,to get this 70, needs some work but the floors,frame and trunk are solid, and the a/c works, keep you advised thanks for your advise.
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84oldsDelta88
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January 3rd, 2012 02:57 AM