Billschroeder5842
Well-Known Member
I think my vacuum advance is dead on my 75 road runner with a 400 4bbl.
I put a vacuum tester on the advance and I was not able to 1) get it to hold any vacuum pressure or 2) get the advance to move with the distributor.
My thought is that the diaphragm is broken. Isn't the arm supposed to move when you apply vacuum and fully hold pressure?
Any way to fix this? I DO have another distributor that I pick up tomorrow if this is unfixable.
So, IF I make a swap and the vacuum advance works, what should I notice? The car runs great, but lack a bit of power (compared to my 69 charger anyway)
Thanks!
I put a vacuum tester on the advance and I was not able to 1) get it to hold any vacuum pressure or 2) get the advance to move with the distributor.
My thought is that the diaphragm is broken. Isn't the arm supposed to move when you apply vacuum and fully hold pressure?
Any way to fix this? I DO have another distributor that I pick up tomorrow if this is unfixable.
So, IF I make a swap and the vacuum advance works, what should I notice? The car runs great, but lack a bit of power (compared to my 69 charger anyway)
Thanks!