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-   -   Timing Jumping all over (http://www.clubcobra.com/forums/shop-talk/94473-timing-jumping-all-over.html)

onefastmustang 01-28-2009 07:59 PM
Timing Jumping all over
 
My wife bought me this really nice timing light for Christmas. I went to use it tonight to set the timing on my cobra but its jumping all over from like 12 to 4 and back again. Whats up with that???

mickmate 01-28-2009 08:06 PM
Check for play in the advance mechanisms and the distributor shaft.

onefastmustang 01-28-2009 08:29 PM
Actually I just tried it with my old timing light and its fine with that one.. Then I tried the new light on a different car and it seems fine on that car. Maybe it doesn't like my MSD ignition?

Tim Brewer 01-28-2009 08:36 PM
It's because you're using a timing light with a adjustable timing knob, which allows you to set advance eisier on NON MSD systems. The only timing lights that work with MSD systems are the basic, standard "cheap" timing lights.

patrickt 01-28-2009 08:36 PM
Quote:
Originally Posted by onefastmustang (Post 916828)
Maybe it doesn't like my MSD ignition?
It doesn't. Some timing lights simply won't work with your (or my) MSD. The 25 year old Sun Inductive light that I'd used for years did the same thing -- I ended up buying the MSD light, although others have reported that a $29 Sears light will sometimes work just as well as the more costly MSD one.:cool:

Calbullet 01-28-2009 08:37 PM
newer timing lights do not like the MSD. something with the multi-spark.

car4jim 01-28-2009 08:42 PM
I have a 1970's era Sears timing light (bare-bones) and it seems to works fine with my MSD ignition. Whatever works!!

patrickt 01-28-2009 08:46 PM
Quote:
Originally Posted by car4jim (Post 916833)
I have a 1970's era Sears timing light (bare-bones) and it seems to works fine with my MSD ignition.
Probably got it for less than $29 too!;)

wtm442 01-28-2009 11:58 PM
Close the gap on the #1 plug down to .025 and try it. Sometimes the wide spark plug gap has a detrimental effect of some inductive timing lights (... like the one I have).

jrjmac1 01-29-2009 06:46 AM
I also use an older Sears timing light and it works fine. Probably a new basic one will work too.


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