Slow responding tach

[dfwthompson]

I'm experiencing problems with my tach. It works but oh so slowly. I recently re-soldered the pins on the CPU plug and all my warning icons disappeared and headlight shines bright again. I originally thought the icon problem was dirty sensors but a lil solder cured my problem. Is it possible the tach connection also needs solder or is it a connection issue with the #2 coil? Has anyone had this same problem with their tach? I saw nothing in prior posts regarding a slow to respond tach. Thanks for all your help.

 

john

[Power Trippin]

I have had it happen once on my 83. It was when the temp was around 30 degrees. That was 2 years ago, and it hasn't done it since. Don't know if it was cold related or just a fluke. I haven't driven it when it's been that cold since.

[Huggy]

Carbs out of sync can also cause that problem.

 

[dfwthompson]

My carbs are definitely out of sync. Is there a procedure online for syncing w/o a manometer. Tried a bench sync to #2...much worse than by ear. I tried making my own manometer per Youtube with 3/16th tubing and vac restrictors, using 2 cycle oil but after warm-up it tries to suck the oil at one or two carbs. Was thinking if the carbs were closer to sync it would not suck oil. Thanks

 

john

[MiCarl]

If the needle is responding slowly it's probably dirty where the shaft passes through the bearing.

 

Mine used to be slow when it was cold. I disassembled and used some RadioShack TV tuner cleaner/lube on it. It contains a very light machine oil. Problem solved.

 

Unfortunately, I don't believe RadioShack sells the stuff any more. The movement is very similar to a clock. You might lube it with some clock oil.

 

Of course everything in there is very delicate. Work in a clean space and use a lot of caution.

[dfwthompson]

Thanks...found the posts on syncing from scratch. If the tach is still slow after sync, will lube shaft then and let you know. Thanks

 

john