Q-jet won't idle down

[earthman]

Put this Q-jet back on the 283 after the two barrel that was on it with adaptor gummed up for sitting to long. The butterflies on the q-jet are closed fully and not held open. Idle adjust screw is not even touching. Idle jets all the way in and choke closed. Idles about 1000 rpm but it should'nt even run. What is going on?

 

[Old Iron]

Check the choke hi idle ramp and make sure when the choke opens that the ramp drops down on it's stop.
Then there's the ole vacuum leak.
Also, does it have a high idle a/c solenoid that might need screwed in some.

 

[earthman]

I will check these OI. Thanks

 

[gene49]

I'd say check the linkage an be sure its all OK, but I would suspect a major vacuum leak if it will run at 1,000 rpm with the chole closed, unless the secondary's are slightly open.

I'm thinking maybe you missed hooking up a PCV hose or a brake booster hose, or the carb base gasket is leaking bad.

 

[earthman]

It was the pcv hose i had from the power brake port on the carb. Thanks Gene and OI.

 

[gene49]

Easy fixes are always better.
We wouldn't know about these things unless we have experienced these things ourselves.
Good job. [cl

 

[Old Iron]

 

[earthman]

This roadster has been out of commission due to one fiasco after another. Finally made it around the neighborhood and back on it's own after about three years. [cl

 

[smallfoot]

And you forgot your camera??[ddd

 

[smallfoot]

I've always been a fan of "Lesser" sbc motors. The 283 and the 305 motors can really respond to a little tweaking.