Timing retarding

[Canadian1968]

I did see another post on a similar problem to mine.

Checking my timing, base set 18. When I increase the rpm , the timing will initially retard instead of advance. As I keep increasing rpm the timing will eventually shoot back it normal advance curve and continue to advance.

The other thread mentioned timing button and shim to the timing cover . Also read a lot of post that said timing button or cam walk is a non issue, especially with a FT cam.

Other part of same thread talked about adding sleve to the bottom of the distributor shaft or even a rubber hose . This is ment to take up any up and down slack in the distributor ?

I don't really want to tear the front of the engine down if I don't have to.

Also had the distributor out and engaged the intermediate shaft. Should be absolutely zero play in between shaft and cam gear ?

This is a new problem that seems to have started last year.

Engine probably has 8k on it

 

[WileE]

What is the condition of your advance weights and springs ?

 

[Canadian1968]

What is the condition of your advance weights and springs ?

All good had the distributor out and apart just make sure good, lubed up weights just for good measure . It's the mallory style MP distributor with the adjustable totally advance slots

 

[OKDart]

Since you have it out that far, check the intermediate shaft for wear where it rides in the bushing.

 

[Fran Blacker]

Didn't they have trouble with those distributors? Didn't Rick Ehernberg write about MP Mallory distributors in Mopar Action that they were troublesome.

 

[68-500]

I got ask. Are you checking timing with the VA unhooked. If it where hooked up to manifold vacuum it could go down when you open the throttle blades.

 

[Geoff 2]

I don't see a vac adv unit....

If it did have a VA unit hooked up.....could it be a 318 dist [ opposite rotation ]? in which case revving in neutral would actuate the VA & retard the ign