Timing

celtglen · Post by **celtglen** » Tue Jul 24, 2012 7:39 pm

dlb wrote:ahhhh, i hadn't thought of that. can you take a picture of your vac cans for us? you've piqued my curiosity now.

Post by **Petros** » Wed Jul 25, 2012 7:11 pm

That is the dist vac advance for a car with Federal emissions system with the High Altitude Compensator. There are some Federal emissions system cars with a HAC, and it would only have 2 vac ports, one on the side and one on the end.

Post by **dlb** » Wed Jul 25, 2012 7:24 pm

CG, that's the style of vac advance cans i was talking about. those two curved ports (for manifold vac and the HAC) share the same diaphragm. the only way one port could do something while the other couldn't would be if one were blocked with crud. i'm not sure but you might need to block the HAC port while you test the manifold vac port, and vice versa.

celtglen · Post by **celtglen** » Thu Jul 26, 2012 12:19 am

Petros wrote:That is the dist vac advance for a car with Federal emissions system with the High Altitude Compensator. There are some Federal emissions system cars with a HAC, and it would only have 2 vac ports, one on the side and one on the end.

That is how it came to me 12/83 !

celtglen · Post by **celtglen** » Thu Jul 26, 2012 12:25 am

dlb wrote:CG, that's the style of vac advance cans i was talking about. those two curved ports (for manifold vac and the HAC) share the same diaphragm. the only way one port could do something while the other couldn't would be if one were blocked with crud. i'm not sure but you might need to block the HAC port while you test the manifold vac port, and vice versa.

Yeah I figured the two on the top would share, but it doesn't seem to think it should. I followed the book on testing the vac ports and the front one..the one used for setting the vac advance for timing--sucks AIR.

Its a non issue at this point..Rock Auto is gonna replace the unit NQA.

Tercel4WD.com

Timing

Re: Timing

Re: Timing

Re: Timing

Re: Timing

Re: Timing