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I think I found the problem. But wth?
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96capriceMGR
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Joined: 23 Aug 2003
Posts: 814
Location: New London Wisconsin
20327.88 points


1996 Chevrolet Caprice

PostPosted: Sun Jul 16, 2006 5:57 pm    Post subject: Reply with quote

The thing with the Q-jet is it got a bad rap because people kowing little would screw with it, screw it up and then scream how it was at fault Rolling Eyes , same thing happens today with other parts.
I will say finding someone competent with a Q-jet would be an accomplishment. I have heard good things about Jet as far as their q-jet work, that is the only thing they do right though.

artinla, thanks for the compliment but I could not have done it had I not found a good b-body specific board, probably helps too that I never learned carbs, this was the first car where I had the money to play so the computer is what I learned first. When a vehicle comes with this much technology it makes sense to embrace it and let it help you, had I started on carbs I probably would have fought the computer and ended up nowhere near where I am today.
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af2
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Joined: 01 Sep 2003
Posts: 5558
Location: grassvalley, ca
71227.76 points


1933 Willys Coupe

PostPosted: Sun Jul 16, 2006 8:22 pm    Post subject: Reply with quote

Did you run a vacuum check yet? I would not go any further until then. Eliminate one problem at a time.
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87IrocTim
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Joined: 10 Jan 2006
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PostPosted: Sun Jul 16, 2006 11:33 pm    Post subject: Reply with quote

the secondaries on aqn edelbrock will not open if the choke is even partially open. check your choke, i had the same problem with my old edelbrock.
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85GMCstreetbeast
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Joined: 01 Aug 2005
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Location: Fayetteville, Georgia
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1985 Chevrolet GMC

PostPosted: Fri Aug 04, 2006 12:43 pm    Post subject: Reply with quote

Well I had a few problems and now im down to 1. The MSD bronze drive gear had worn down so put the steele one back on it and blocked off the vac advance and made set it to 25 deg at 3200 rpms = 35 with 10 deg intial timing. Well no change motor ran the same so we put my buddys compression tester on number 1 cyclinder and get 180... But we can unplug the # 1, 6, and 7 wires and there is no change in idle. The motor was running on 5 cylinders now. We replaced all the msd 8.5's with some cheap 30 dollar ones and bam its running worse. The cap and rotor are good and all the plugs are firing and in the correct order, we have compression, and fuel. Well after talking to Ronnie yesterday he suggest that one of the floats is sinking and not allowing enough fuel into the carb. It has been a lean condition this whole time, this sucks dont run edelbrock carbs.
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af2
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Joined: 01 Sep 2003
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Location: grassvalley, ca
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1933 Willys Coupe

PostPosted: Fri Aug 04, 2006 7:59 pm    Post subject: Reply with quote

85GMCstreetbeast wrote:
3200 rpms = 35 with 10 deg intial timing. Well no change motor ran the same so we put my buddys compression tester on number 1 cyclinder and get 180... But we can unplug the # 1, 6, and 7 wires and there is no change in idle. The motor was running on 5 cylinders now. We replaced all the msd 8.5's with some cheap 30 dollar ones and bam its running worse. The cap and rotor are good and all the plugs are firing and in the correct order, we have compression, and fuel. Well after talking to Ronnie yesterday he suggest that one of the floats is sinking and not allowing enough fuel into the carb. It has been a lean condition this whole time, this sucks dont run edelbrock carbs.


If the float was sinking you would be smokin the neiborhood with raw fuel Shocked Not lean!
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85GMCstreetbeast
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1985 Chevrolet GMC

PostPosted: Sat Aug 05, 2006 8:39 am    Post subject: Reply with quote

then i must have misunderstood ronnie its stuck up which ever way it is that is not allowing enough fuel into the motor, which is why if you put your hand over the carb choking the motor it runs better, right now its too much air and not enough fuel.
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artinla
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Joined: 09 May 2006
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1971 Chevrolet Nova

PostPosted: Sat Aug 05, 2006 7:22 pm    Post subject: Reply with quote

Which means that either your carb is totally screwed, or there is an air leak between it and the heads.

My money is on the carb being a POS. Either have someone find the problem with it or replace it with a Holley. That Edelbrock is going to be a pain in your ass until you finally get rid of it.
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Big Dave
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PostPosted: Sat Aug 05, 2006 7:30 pm    Post subject: Reply with quote

Like Art said if you put your hand over the carb cutting off the air supply it will fall flat on it's face being too rich unless you have a vacuum leak. If you have a vacuum leak (like I think you do) you will never get the carb adjusted; because you are not metering the fuel and air together.


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85GMCstreetbeast
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1985 Chevrolet GMC

PostPosted: Sun Aug 06, 2006 7:41 pm    Post subject: Reply with quote

It sounds like there is a vacuum leak inside the carb, Im looking at getting a Quick Fuel 650 mec sec carb from summit or a Demon from Barnette Performance.
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