at high rpm timing is bouncing. but I have got no points???

[Xander]

Hi,

 

I have converted my points type ignition to a pertronix unit. Now I have only heard good things about there units but I stil have the same symptoms. checking with a timing light I can see that above 4500 rpm the timing is jumping around. At lower rps it looks rock steady but at higher rpms the timing is fluttering around with about 10 degrees.

I took apart my distributor and there is no play on the shaft. everything looks normal.

Can it be that my driving gear is worn or lose? Today I got a transistor type ignition from frank280zx. I'm gonna try that tomorow. maybe that helps.

[JMortensen]

I assume that when you say you took it apart that means that you tore it all the way down. You can't really feel bad bushings with everything still together.

 

Here are some teardown instructions for a ZX dizzy. I think all the L series distributors are similar inside, so it might help. http://www.jrdemers.com/280ZX/distributor/distributor.html

 

If the bushings are good then I would guess that it is the gears causing the slop and swapping out dizzys should do nothing to help, but will let you know for sure what the problem is.

 

Good luck,

 

Jon

[dot]

Just a thought Xander...the timing chain could be sloppy. Has it been changed recently?

[Xander]

today I installed the distributor woth the transistor. It cured all my problems. I think the axle inside the old points style dizzy was bend. The conversion to pertronix didn't help either. But now I'm a happy man again. I can finaly, after a year of frustration, rev to 6500rpms without a glitch.

 

thanks frank for the dizzy and thank you all for your input.