Elec. Dizzy, Vacuum advance diaphragm

[Hezath]

I have one of the R30/280ZX distributors in my Datsun and the vacuum advance diagram/actuator is no longer working properly. I believe these parts are discontinued but I'd happily be wrong. Anyone have any lying around they don't mind getting rid of? Haven't had much luck at the wreckers around here.

 

Heath 0421 770 110 or hezath@gmail.com

 

Cheers!

[zeds4ever]

 

 

    G'day mate, there is a bloke up in Q'land who rebuilds diaphragms @ $55.00 for forum members, you can contact him on Ph# 07 54280808 his name is mike he rebuilt my 280 unit which now works fine. Tell him alan sent you.

 

                              Regards: Alan.

[Hezath]

Just made contact with Mike, sounds promising.

 

Thanks for the quick & helpful reply!

[Hezath]

He had a rebuilt one on the shelf and I received it today, installed it and I can't say I've done any comprehensive tests yet but it definitely doesn't leak like the old one. Thanks again!

[zeds4ever]

 

 

    No worries mate, glad to help a fellow zedder out.

 

                                            Regards; Alan.

[steady88]

Hey, I'm having problems with my 280. It has no power at all when I put my foot down under load and wont rev past 1500 in drive.

 

I know for a fact that there is a vacuum leak in the advance diaphragm which I want to replace or repair. I was wondering though if this in fact is my problem.

 

Does the vac advance make a big difference to performance? If it is not working, would I experience no power at all?

 

Cheers, Steady!

[MaygZ]

No.  You have another problem.

 

If it revs higher in park or neutral then it is a box problem.

 

If it revs better in 1st or 2nd then Drive problem.

 

If it wont rev at all, then look at fuel and then spark.  It could be as simple as a sticking linkage or butterfly.

 

A lack of advance (either vacuum or mechanical) will limit engine rev/performance, but not that much.