Let me first start by telling what we changed. My cousin has a 67 Camaro with a mild 350 in it. It has a really nice quadrajet. However the previous owner(we've only had it about a month) when he ran the fuel line from the pump to the carb he ran half steel line, then kinked the rubber line up by the carb. Well, I bent a totally new steel line from pump to carb, put in a new filter, all of that works great!

I also had him get in the car and floor it, the secondary's were only opening about a fourth of the way. The guy had a piect of all thread on there for the throttle linkage. We're building a new one next week. So I shortened the one that's on there for now.

Now for the problem, now that you guys know what I've changed. The car runs great as long as your cruising it around. However, when we went to open it up it runs good for a little bit then the float sticks and when you slow back down it floods itself out and gas is pouring out from around the accelerator pump!

Do we have some garbage getting hung up under the needle? But why is it only doing it after WOT runs? Thanks in advance for all the help!

Matt

Originally posted by 70ss496:
However, when we went to open it up it runs good for a little bit then the float sticks and when you slow back down it floods itself out and gas is pouring out from around the accelerator pump!

Do we have some garbage getting hung up under the needle? But why is it only doing it after WOT runs? Thanks in advance for all the help!

Matt Maybe the accelerator pump/gasket is shot? Have you had the carb apart, and made sure the float is on there right? Ie. The little clip on the arm of the float?

Instead of "piece mealing" this, I would take the carb off, and get a rebuild kit for it. From the way it sounds, it was cobbled together, and who knows what else could be wrong with it. Get a new float, and a rebuild kit. That way, you start from square one, so to speak. Last time I got a rebuild kit, it was around $15, and that wasnt that long ago (couple months, maybe). You will literally tear your hair out trying to figure out what kind of BS might have been done to the carb, and what is causing you problems. They come with an accelerator pump, which on its own, is like $7 anyway. Just, IMHO..

I second "clean the carb" and get a new float.

The carb was supposedly just gone through, but if you don't know what your doing in a Q-Jet your screwing it up more than helping from what I've found out. I believe I go through it next weekend, I've done a few just not for a few years.

So is it probably not junk getting hung up in my needle and seat? I don't get the wide open throttle thing. After it does it, if you tap on the front of the carb slightly is when it will stop flooding itself. Thanks for the replies.

Matt

As Buzz said get a new float! And a kit.Float could be rubbing on the inside of carb also check needle and seat area closely. Then you should be back driving it with no time guessing whats wrong.

Originally posted by 70ss496:

So is it probably not junk getting hung up in my needle and seat? I don't get the wide open throttle thing. After it does it, if you tap on the front of the carb slightly is when it will stop flooding itself. Thanks for the replies.

Matt If junk was getting hung up in the needle and seat, IMHO, It wouldnt idle for beans. Like LKN BCK said, its possible that the float could be rubbing against something in the carb...or maybe that little clip on the arm got jimmyed somehow..Hes right about the guessing. Thats all you will be doing when you dont know whats in there to begin with. Make it easy on yourself and start from square one, so to speak.

you don't need that clip on the needle, I haven't used one of those for twenty years. if there is one, throw it away. look carefully at the way the float fits in the fuel bowl, as LKN BCK noted there are circumstances wher the float can scrape the side of the bowk. use the carb number to get the correct float at NAPA or someplace similar.

Tom

It's possible someone used one of the holes in the float arm to hang the needle clip. Definate no-no!

I partially agree with Tom's comments regarding the clip. The only way you would need the clip is if somehow deposits or an extended storage period with the needle and seat closed resulted in it wanting to stay that way. With the clip, the float would be able to pull the needle up. Unlikely scenario, but it's also unlikely GM used the clip for no reason whatsoever. I use the clip, but I've seen many carbs run without one.

Like Tom stated, especially on later model Qj's that have tiny float bowls, if the float swells at all it will hang up on the side of the cavity. Get a new float when you rebuild!

Two other things you can check for is the secondaries shutting decisively when you let go of the throttle, make sure also that the accelerator pump action is smooth. If it isn't, it can cause the throttle to remain open - especially if you don't use a strong return spring.

Mike

Yup, got here late, but these guys squared you away. Using thread for a throttle cable, the prior owner probably effed up a bunch of things including the float.

Thanks guys, I'm getting a kit this week for him and we're going to rebuild it next weekend with a new float. I think you guys are right, the previous owner kind of cobbled a few things on it. The big block is coming real soon anyways, but we probably use this carb so I want to make it right.

What should I use for the throttle linkage? Like I said it has a piece of all thread going from the carb to the linkage that comes up behind the motor, what should I make that would look nice and work better, or better yet what should be there. I know my Chevelle is a cable, are these different in '67.

Thanks for all the help.

Matt

Yes, on a 67 its the arm that comes off the fire wall and then a solid rod to the carb. I don't know what the orignal ends look like, I happened to have an old Qjet end which is like a threaded barrel with a "ball and socket" swiveled pin sticking out the side on the carb end, and a regular threaded collar with a pin for the other end.

Any resto supply house, like our sponsor Ground Up www.SS396.com (http://www.SS396.com)should be able to fix you up with the complete assembly.

Thanks Gene, I found some 1/4" SS rod at the hardware. At O'Rielly's they have the piece that snaps on to the ball and has threads in it. I should be able to make a pretty trick piece. We'll see, I think we'll rebuild it this weekend and build the new throttle linkage to make it not cobbled anymore. Are there any small changes I can make to help out the q-jet. I know a lot of people that have screwed a great carb up, simply by not knowing what to do. It's one of the older quadrajets, I'm going to have him get the numbers off of it tonight. Thanks

Matt

If you go with the original style parts you will need to thread the throttle rod with the original style threads. It's a really wierd size. Let me know if you can't find the correct die. It's not 1/4-20. If my memory serves it's somethng like 1/4-24 or 1/4-28.