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Old 09-02-2012, 03:39 AM
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Originally Posted by LEROYDOZOIS View Post
did the book talk about cleaning those ports where the tubes came out of ?

the guy i talked to said ( just because air and carb cleaner goes through the idle tubes that doesnt mean theyre cleared out, they become "corrosantifyed" and plugged up)

also how did u install the new tubes ???
The idle circuit is about the most important thing to get right on a Q-jet when used on a performance engine. Depending on the original application, the idle circuit can be very restrictive and w/o proper tuning, the idle and off idle response will always be a problem.

The guy is at least partly right about the amount or sound of the air blown through the tubes. But unless you have done this, forget it- about the best you can hope for is to verify that there is an equal amount of flow through both tubes. If one is obviously more restricted than the other, well, you have a problem. Best bet is to just remove them and clean and reinstall. If the tubes only need slight opening up (the small, bottom end is the "working" orifice, you can use a small numbered drill bit and a pin vice to open them up.

A bit of info on the Q-jet in general and removing the tubes in particular can be found here. Ruggles' book is said to be the schitz among the Q-jet books available. Roe's book is often mentioned as well. They are listed in the article linked to above.

Good luck.
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