Hi Folks,

Though it isn't the whole of my XJ6's problems, I have found that the Vacuum Delay Valve, also known as the Vacuum Regulator Valve, is leaky. This is the round valve hanging under the intake manifold that has three ports for Carb, Delay and Dist.

I had read (on Jag Lover's Forum) that this was an off the shelf GM part used on 79-80 6 cylinder Chevys, and that Napa part CRB 2990 is a perfect replacement. The problem- it looks like Napa no longer makes that part number. In fact Google can't find any reference to that number except from that forum. Trying to find the part by looking up 79-80 Chevys with a 6 doesn't narrow things down enough- they had at least four different sixes in those years in everything from Citations to full size trucks.

So does anyone know what currently available valve I should get to replace mine?

Thanks,

-mB

P.S. Here's the source of that interchange information:

XJ Parts Interchange Guide

 

I forgot to mention- mine is an '85 XJ6.