had a friend help me adjust the mixture on my 600 holly today. Now if I down shift coming to a stop it dies but will start right back up. Is the mix to lean or to rich

 

Kinda tough to tell from here..

 

What did you adjust the idle mixture screws or the jet size? Either way I would say richen up the idle mixture screws and see what happens. Did it die before or is it a new install?

 

It was runing fine before except it was running very rich the vumes were killing me. adjusted the mixture screws

 

You understand that the mixture screws only affect mixture at idle. The only way to adjust mixture at normal rpm is to rejet it.

 

I was thinking of rejetting it but figured why not try adjusting it. Aleast I wouldn't be sitting a light with my eyes watering.

 

If it is at the light idling where you are having problems the mixture screws will do it. You may not need to rejet if you pull your plugs and you have a good color and burn on them.

 

thanks for all the help I will check it out the next time I get the tinkering bug

 

You may need to replace the power valve. Is your cam stock or after market and if after market what are the specs?

 

I haven't done any mods to the engine sence I took it out of the parts car I had it was nonoringal to that car should be stock. Put the 4 barral on it bacause the 2 barral was shot from all the starter fuild the pervese onwner spayed in it.