OK-ALL THE SMART PEOPLE-HELP

Date 05-07-2008 02:59

Do these carbs have idle & high speed jets? If so perhaps the high speed jet is clogged. Be sure You have the proper gap at the points too.

By Kix

Date 05-07-2008 12:55

Once it got up to a constant RPM did it stop missing?

By jlp

Date 05-07-2008 13:39

no it does not stop missing,changed carb,and mag.,good idle miss above idle to top speed&dont stop

By aevald

Date 05-07-2008 14:02

Hello jlp, one quick thing, if you have another coil laying around try swapping it out. Sometimes a coil will have enough spark to run fairly decently at lower rpms but won't work when you start bring up the r's. Just another thought. Best regards, aevald.

By Kix

Date 05-07-2008 14:19

You're probably getting some arcing going on inbetween the coil and plugs. Is there water or oil around where the plugs go into the head? At night have someone run a rod for you while you check for arcing. It sounds like your grounding out somewhere while under a load. Check your plug cap, make sure they're snapped in good. I've seen arcing come right through a rubber boot before. That was on a MSD digital setup though so it was cranking some voltage.

By RonG

Date 05-07-2008 20:25

While it is running and missing remove 1 plug wire at a time and that should tell you if the problem is in the ignition.

By DaveBoyer (*****)

Date 05-08-2008 03:31 Edited 05-08-2008 03:33

Look inside the mag cap for "carbon trails" this is a deposit of conductive material, looks like a pencil line, that can cause high voltage to leak off to ground. It takes more voltage to jump the plug gap when You open the throttle, making voltage leakage more likely.

If You have recently had any cooling system leakage, the antifreze residue makes high voltage leakage a serious problem. In this case wash the mag cap and plug wires in strong detergent and dry thoroughly.

By JMCInc

Date 05-08-2008 06:20

Condensor. I had the same problem. Purr like a kitten at idle, barely run when the throttle was opened.