'69 GMC 305 V6 not running right

[DreamRyder1963]

Originally Posted by marvgarr68

Here is the distributor and they are cheap price
http://www.autozone.com/autozone/par.../N-ir009Z9n80u

For that price I might as well replace it while I'm at it.

[DreamRyder1963]

Originally Posted by marvgarr68

DreamRyder that dist is much the same as the one in your corvair if that helps. Only difference is the two line vacuum adv and the dist drive. Maybe you can see what is wrong I Know on my 62 monza I had dist problems all the time replaced it never had a problem again. Now to check the adv unit get a vacuum pump one of the hand held ones. Hook up to the outer line on the adv unit and start sucking if it moves its ok. Now check the back line if it moves its ok. If this test is ok and the timing is still ok I would 1st check the carb maybe base gasket blew out. Did it back fire at all? Take off the carb clean it up and replace gaskets plug all the vacuum lines except the two lines to dist. Replace the vacuum lines also see how it runs.

I didn't realize that they were the same.thanks for the info. I know my corvair loves to eat points. I hope that's not they case with this one.

[marvgarr68]

They do and are just as sensitive to point adjustment. Its the disign of the cam in the dist it has an aggressive slope causing the points to wear down quick. Also make sure the white cloth wire is still ok it is a restive wire for the coil. Make sure nothing else is running off of the wire also like a choke coil.

[DreamRyder1963]

Well I ordered that distributor this afternoon and I got it in at 4 today. The only problem I see is that this distributor is the other type (the one with the v8 style mechanical advance) than the one on my brother's truck. Can I simply swap other the two distributors or are the cam gears different?

[marvgarr68]

What do you mean? Is there only one vacuum connection? If so this is fine even better really just connect it to the port vacuum on the carb (no vacuum at idle but when throttle is opened there is vacuum). Mark the old dist and remove it make sure its on #1 cyl fire and check the gear should be the same. It will run better with this dist I would think.

[DreamRyder1963]

Originally Posted by marvgarr68

What do you mean? Is there only one vacuum connection? If so this is fine even better really just connect it to the port vacuum on the carb (no vacuum at idle but when throttle is opened there is vacuum). Mark the old dist and remove it make sure its on #1 cyl fire and check the gear should be the same. It will run better with this dist I would think.

Yeah its the one with only one vacuum. Good, I wanted to double check that it would just drop in.