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Post by phils85c10 on Nov 22, 2007 22:48:01 GMT -5
I have a 85 c10 swb....305 with an hei dist.....I dont think the vaccum advance is working right.... how do i know if it isnt working and is it really making my gas milage nutsty.....thanks
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Post by BowtieGuy on Nov 23, 2007 20:18:10 GMT -5
The best way to tell if a vacuum advance is working is disconnect the vacuum line from it and see if the engine rpms drop. If you cant tell a difference in it the you can use a timing light. When you disconnect the vacuum line you will see a change in the timing mark. Yes if it is not working it can make your gas mileage poor and nutsy.
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Post by phils85c10 on Nov 23, 2007 21:54:34 GMT -5
thanks man thats very good info, perfect......well its not working then, but i had bought a brand new HEI dist. That i havent put on yet, so what i did was take all the insides out of the new one and pet them on the old one, if you know what i mean.....i am real nervous about pulling the distributer out, it may never run right again...lol.....so i hope this new vac adv will help it out some.....thanks again
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Post by BowtieGuy on Nov 24, 2007 13:33:32 GMT -5
No problem glad i could help.
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