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| | | | Joined: Jul 2012 Posts: 306 Shop Shark | | Shop Shark Joined: Jul 2012 Posts: 306 | i think my vacuum advance is bad , i took it lose from the carb and put a pump on it and i cont get it to move at all or even pump up , that means its bad right ??
and were does the vacuum line go from the carb base ?? to the mod valve on tranny ??
thanks
1958 chevy biscayne
235 6 cyl 1 barrel
2 speed PG tranny
| | | | | Joined: Aug 2005 Posts: 6,377 Ex Hall Monitor | | Ex Hall Monitor Joined: Aug 2005 Posts: 6,377 | Year and model of truck plus any 'other than stock' drive line modifications? 'Tain't one size fits all. More detail from you makes it easier to help you.
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| | | | | Joined: Jul 2012 Posts: 306 Shop Shark | | Shop Shark Joined: Jul 2012 Posts: 306 | 1958 biscayne
235 inline 6
1958 chevy biscayne
235 6 cyl 1 barrel
2 speed PG tranny
| | | | | Joined: Aug 2011 Posts: 835 Shop Shark | | Shop Shark Joined: Aug 2011 Posts: 835 | They don't "pump up" they "vacuum up". Try fitting a (clean) tube on it and suck it, or attach it to a vacuum pump.
Kurt | | | | | Joined: Jul 2012 Posts: 306 Shop Shark | | Shop Shark Joined: Jul 2012 Posts: 306 | i did that i put a tube on the carb in of the metal line and sucked and it wount suck up , i did check the line and it was ok ,, i should have been able to suck on the line and watch the vac adavance move right ??
1958 chevy biscayne
235 6 cyl 1 barrel
2 speed PG tranny
| | | | | Joined: Mar 2005 Posts: 1,636 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,636 | Another easy check for the vacuum advance is to take the hose off, turn the distributor to advance it manually, then place you finger over the fitting where the vacuum line goes.
If it's holding, when you let go of the distributor you should feel a bit of suction on your finger. The distributor body may not return all the way to where it started from until you take you finger off the fitting. | | | | | Joined: Jul 2012 Posts: 306 Shop Shark | | Shop Shark Joined: Jul 2012 Posts: 306 | Good one i will try that for sure, , my local parts houses dont have a vacuum adavance, , maybe it was the fitting its self just not tight
Thansk
1958 chevy biscayne
235 6 cyl 1 barrel
2 speed PG tranny
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