"Bandit" (2bandit)
05/29/2014 at 12:46 • Filed to: Emma
1
8|
"Bandit" (2bandit)
05/29/2014 at 12:46 • Filed to: Emma | 1
| 8 |
I was going to drive Emma to school today for one of my last finals (it took all of 5 minutes to complete and now I've got nothing to do for 2 hours...) but the darn thing still isn't running right. I'm pretty sure my problem is the choke is opening too quickly. I've rotated the thermostat closer to the lean side but it didn't really seem to do all that much. Any suggestions? 1978 Quadrajet with and electric auto choke.
lone_liberal
> Bandit
05/29/2014 at 12:49 |
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I'm sure people with more experience with Q-Jets will have a better answer, but you might want to read up on the choke pull-off. That might need adjusting.
camaroboy68ss
> Bandit
05/29/2014 at 12:55 |
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first I would unhook the choke to see of that's the problem. Neither of my carb cars have chokes. They are a little cold blooded because of it but nothing to big to worry about
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Bandit
> lone_liberal
05/29/2014 at 12:58 |
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I'm not exactly sure how to adjust it.
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lone_liberal
> Bandit
05/29/2014 at 13:02 |
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Like I said, I'm no Q-Jet expert, but the guy here seems to have it down http://www.montecarloss.com/community/ubbt…
You could also look on YouTube for some videos of it. I'm betting there are some there.
offroadkarter
> Bandit
05/29/2014 at 13:17 |
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ditch the quadrajunk and do a TPI swap, welcome to the 1980's.
Jedidiah
> Bandit
05/29/2014 at 13:17 |
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You need to adjust the choke pull-off adjustment screw. It's the phillips-head screw on top of the vacuum pull-off canister arm. It's right up top and easy to get to. It determines how far the choke plate is bumped open immediately after startup (as soon as there is manifold vacuum). Turning it CLOCKWISE will result in less choke opening (richer) and CCW will make it leaner. It only affects the choke IMMEDIATELY after starting but before the choke starts to heat up, relax and open on it's own. If your carb has a secondary vacuum pull-off at the passenger side/rear of the carb I suggest you simply remove it and it's linkage- it does the same thing but a little more slowly and it makes tuning the choke much more difficult for an average weekend wrench. In the real world, you can just play with the setting one cold morning at a time until it starts and runs on the first or second firing. Try putting a full turn clockwise on the adjustment screw and see how much better it runs the next time you fire it up on a cold morning. If it's better, keep going 1/2 turn at a time until you get acceptable results. Again, playing with it ONE COLD MORNING AT A TIME. You really only get one or two shots at it every morning before it starts becoming less "relevant" to the next truly overnight-cold start. Don't go so far that you cause it to flood out shortly after starting- that's an even more miserable problem than the one you've got now.Also, before you make ANY adjustment you need to make sure the vacuum can is actually retracting fully. The only limiting factors are that the canister itself is shot (leaking vacuum, physically jammed, etc.) or that the rod going back to the secondary air doors is too short and preventing the vacuum canister from reaching full retraction. This is easy to check for- just make sure there is a TINY bit of slack in the linkage with the vacuum canister fully retracted- so that the secondary air doors can be pushed open just a few degrees even with the vacuum canister fully retracted. If it needs adjustment it is done by bending (yes, BENDING) that connecting linkage at it's 90* bend back near where it connects to the air door arm.
Copy and pasted from a thread.
I'd recomend this book about the quadrajet. It is considered to be the bible amongst people who rebuild them.
Vince-The Roadside Mechanic
> Bandit
05/29/2014 at 13:41 |
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Get a thermoquad a plastic carb that punishes you for going full throttle.
OkCars- 22k Crossroads
> Bandit
05/29/2014 at 15:08 |
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Dem bandit, i dont know, i hope someone can give you advice.
