Apr 5th, 17, 08:27 AM
Join Date: Nov 2000
Re: 81 Carb question Computer
Oh the good ol days. I use to own a 81 Z28, and had the same idea back then. But....it wasn't as easy one would think.
I replaced the carb, intake, distributor.....the whole nine yards, and it ran worse.
Remember, this was the first year for GM's infamous CCC system, which controls everything from the engine management to transmission control. If anything was missing from the CCC (info / data), nothing would work, and you get put into the "limp-home" mode, with the Check Engine light. Basically it runs like crap, and there's nothing you can do.
What it all boil's to is...either get rid of the entire system and transmission and revert back to a non CCC configuration - or put it back to stock, which is what I had to do. But...
In my case, it was a simple adjustment near the electric solenoid on the top half of the carb. You'll find a small round plug which you'll need a small drill bit to open up....not too far, just enough to break through the cap. Take a long screw, and screw it in and pull out with the help of pliers.
Start the car and adjust the carb (actually the solenoid) while its running you'll tell when it's right.
After I did that, the car ran great. In addition, there are a couple of wires on the front connector of that solenoid that can be monitored by a multimeter to make sure the monitor voltage is right on spec.
Either way, wanted to throw that out to you just in case. Hope you get it running right.
Btw, get the GM shop manual....it proved invaluable troubleshooting CCM issues.
69 Camaro Z27
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