Q-jet selection
Thread Starter
Drifting
Joined: Oct 2003
Posts: 1,348
Likes: 18
From: Dallas Texas
Q-jet selection
Guys
seems like the q-jet on my 74 has issues.....is the 76, 77, q-jet the one where they added the anti-disel switch and had the big blank **** for the choke adjustment?
seems like the q-jet on my 74 has issues.....is the 76, 77, q-jet the one where they added the anti-disel switch and had the big blank **** for the choke adjustment?
Tech Contributor
Joined: Aug 1999
Posts: 14,370
Likes: 6,364
From: At my Bar drinking and wrenching in Lafayette Colorado
1967 thru 1974 passenger car Q-Jets are divorced choke carbs. They use a choke coil mounted to the intake manifold. 1975+ passenger car Q-Jets are integral choke carbs and use a choke housing for hot air or electric choke systems. Any carb, including late 60s, can have the idle-up solenoid, so the solenoid is not an indication of year.
Racer
Joined: Aug 2005
Posts: 340
Likes: 0
From: Rural Crete Nebraska
I rebuilt my 74 carb and am happy with it.
Racer
Joined: Aug 2005
Posts: 340
Likes: 0
From: Rural Crete Nebraska
Thread Starter
Drifting
Joined: Oct 2003
Posts: 1,348
Likes: 18
From: Dallas Texas
Thanks I will have a look
there are really only two adjustments on this thing...two jets, I turned all the way in then out 2.5 turns..on the choke screw, I played with it in and out ...does not seem to make a difference
there are really only two adjustments on this thing...two jets, I turned all the way in then out 2.5 turns..on the choke screw, I played with it in and out ...does not seem to make a difference
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Racer
Joined: Aug 2005
Posts: 340
Likes: 0
From: Rural Crete Nebraska
OK, you're talking about the idle mixture screws. You should check your choke pulloff and see if it's functioning.
Thread Starter
Drifting
Joined: Oct 2003
Posts: 1,348
Likes: 18
From: Dallas Texas
Thanks
the carb is a new/rebuilt from Orelly....
when its cold should the choke plate be all the way closed or should there be about a 1/4 inch opening
besides the idle mixture screws, the only other adjustment is the other screw below the choke pull off....except of course the main idle screw
the carb is a new/rebuilt from Orelly....
when its cold should the choke plate be all the way closed or should there be about a 1/4 inch opening
besides the idle mixture screws, the only other adjustment is the other screw below the choke pull off....except of course the main idle screw
Tech Contributor
Joined: Aug 1999
Posts: 14,370
Likes: 6,364
From: At my Bar drinking and wrenching in Lafayette Colorado
Oh, gawd.... there's your problem. That carb is seriously screwed up. It will have a cut power piston and plugged idle air bleeds. It needs a complete teardown and correct setup with correct parts.
Thread Starter
Drifting
Joined: Oct 2003
Posts: 1,348
Likes: 18
From: Dallas Texas
Lars
you say "Oh, gawd.... there's your problem. That carb is seriously screwed up"
can you recommmend a place to get a carb ?
Should I go back to Orelly and throw the carb through their window?
Thanks
you say "Oh, gawd.... there's your problem. That carb is seriously screwed up"
can you recommmend a place to get a carb ?
Should I go back to Orelly and throw the carb through their window?
Thanks
Drifting
Joined: Mar 2006
Posts: 1,526
Likes: 2
From: Oak Ridge NC
If it is a good carb, I think that Lars or Ole can rebuild it correctly if they can get the parts.
Safety Car
Joined: Oct 2005
Posts: 3,570
Likes: 1
From: Algonac Michigan
Any mods to the carb itself minus rod changes. I have bought a few till I got one that was not molested. An example would be where someone didn't know how to adjust the choke, or choke pull off so they drilled two big holes in the butterfly plate! Really you just have to look at the carb and see that it is whole.
Lars recommended to me that I should look for a '77 carb from a G.M pass car. I did he took it home with him and I couldn't be happier!
Thanks Lars and ....Where is my sticker???
You know If you were to stick to domestic beer your memory might improve!!
Say Hi to Donna from me and Janice!
Lars recommended to me that I should look for a '77 carb from a G.M pass car. I did he took it home with him and I couldn't be happier!
Thanks Lars and ....Where is my sticker???
You know If you were to stick to domestic beer your memory might improve!!
Say Hi to Donna from me and Janice!