My ‘71 won’t idle with air cleaner on.

[HO455]

Originally Posted by Bad4wd

Good times and funny stories. I Also was in the Navy. Played with the carb today, same thing nothing new. Never had a quad change rpms with your hand in front of the primaries but, I never had a 9.8:1 comp. engine and stock converter with this carb.

It is possible that one side of the primary idle circuits is plugged or running lean and the other side is carrying the load so to speak. Thus making the once side more sensitive to airflow variations. When you run the idle screws in or out do both side react the same?

[Bad4wd]

Originally Posted by HO455

It is possible that one side of the primary idle circuits is plugged or running lean and the other side is carrying the load so to speak. Thus making the once side more sensitive to airflow variations. When you run the idle screws in or out do both side react the same?

Maybe. If i turn either screw in it will lower the rpm both will kill the motor. I will take the carb off this weekend and tear it apart.
I also put a 3'' rubber hose extension for the bowl vent. But did't help.
and I tried just putting on a 2'' air cleaner spacer (no Base or Air cleaner) even the spacer bods down the rpms.

[Bad4wd]

I forgot about this thread. I never Figure it out. Spent way to many hours on troubleshooting, hours I could be doing other things to the truck. I, Just order a new quad. From summit, problem fix.