86projectZ

I was wondering something. Some carbs wont work on a computer controlled engine. Does my 86 sport coupe(305 4bbl) have a computer controlled carb?

JamesC

iTrader: (5)

Yes.

JamesC

86projectZ

I was just asking cuz my buddy at baxters can get me a 600 cfm edelbrock with electric choke for a bit over $250. Ive read that edelbrock carbs don't work on computer controlled cars, so does this mean the 1406 edelbrock won't work, or what is the conflict here, if there is any?

JamesC

iTrader: (5)

Simply, they wouldn't work with a computer. The Q-Jet is much underrated and will flow as well as the 600 you refer to--perhaps better. With a few tweaks, you'll be much surprised:

https://www.thirdgen.org/quadrajet

JamesC

ur7x

iTrader: (2)

My experience with e'broke and carter carbs is not good...
Save your $250... and fix the Q-jet...
Start with replacing all of the vacuum lines... and the vacuum pull offs...

The q-jet is an easy carb to rebuild and you can have it running like new for less then 1/2 of the $250 above.

Air_Adam

Keep the quadrajet... the Edelbrock is just an overhyped Carter AFB. Its a 4-barrel that was designed in the '40s and built in the '50s and '60s. The Qjet is a much better carb. But if you insist on changing it, go to a Holley at least.

86projectZ

Im not afraid to work on a car at all, have been for year. However, this is my first carb'd car, and have no idea on how to rebuild a carb. Ive been told that unless you know what you're doing then don't even attempt it. Im just gonna throw another rochester on it. Just need to find one. Any ideas?

naf

iTrader: (7)

A reman can be had at AZ or one of the other places. There's a sticky above on the rebuild though. A $20 kit, some carb cleaner and a Saturday afternoon should get you there. You may wind up having to replace a sensor which could add another $15-20 to the job.

If you decide to rebuild, post back and we can give a few tips that may make it go easier.

ur7x

iTrader: (2)

If you have never taken a carb apart, a Q-jet is not a bad choice to try.

Step one... Buy or check out of your library the Doug Roe book on Q-jets... In this $20-$30 book he walks you through step by step the disassembly and reassembly of all Q-jets, Dual Jets and CCC systems.

Most people who will tell you this carb is too hard to take apart either:
1) Have never tried or
2) Own a re-manufacture company and don't want you to try...

I've done 4 over the years... 3 mechanical and 1 CCC... The CCC is ever so slightly more complicated and you do have to know what special steps to take to remove the MCS and to set up the TPS... But other the that... anyone with basic tools can do this.

The only thing to watch out for are the throttle bushings... if the throttle bushings are loose or worn then you should probably get a different Q-jet to work on... There are inserts that can be pressed in, but this is beyond what I would recommend as a DIY project.

86projectZ

By AZ you mean autozone right? checked their website found nothing. is it special order maybe?

naf

iTrader: (7)

no, try:64-7637 for the re-man q-jet for automatic trans. $250 is a lot of $ though compared to a rebuild kit.

Tobias05

my good buddy went the expensive route and bought a reman CCC qjet from autozone. works absolutely perfect, all he had to do was adjust the idle screw.

86projectZ

Yeah, but I know nothing of carburetors, and this one is factory, so Im gonna replace it. The number you gave me is to a holley, not a rochester. Will it work, I need one that is computer controlled. Under the "note" section, it says Rochester M4ME-but title says holley. What's that all about? Will it work?

86projectZ

Hey naf- I tried that and it brought me to a holley. Weird, so I called them. I gave them the number off the factory qjet, and they told me all they have that will work is a Champion that they will have to special order for about $387 plus tax(in vancouver anyway) and a $35 core charge or so. Got any other ideas? Or will the holley work?

naf

iTrader: (7)

Better double check what you have. Canadian models didn't normally come with computer controlled carburetors. The ccc-qjet should have 2 (two) electrical connectors on it. One three wire connector near the front for the TPS and one two wire connector on top pass side for the mixture control solenoid. Make sure it has both, as some non-ccc qjet models have one electrical connector that is similar to the MCS connector that provides cold start enrichment.

Sorry I missed that you were from Canada.

Oh, holley just remanufactures the q jets as new ones are no longer produced.

ur7x

iTrader: (2)

Trust me!... If its a non CCC Q-jet... Buy(or borrow) the Doug Roe Book and have at it... They are easy to rebuild and make right...

The non-computer ones can be rebuilt with a Phillips screwdriver, a small hammer and finishing nail. Before you go the "factory" rebuilt route head down to the VPL library (once the strike is over, any day now ) and check out the doug roe book...

Take a read... You will be amazed how easy it is to rebuild...

Then head to Lordco/NAPA an buy the rebuild/gasket kit... Your car will run like new for less then $50CAN