Quote:
Originally Posted by dochawk  I have the rebuild kit for the carb on my 72 Eldorado convertible, but I'm new at this.
There is a small metal "box" on the driver's side of the air filter housing--is this the egr connection?
When I had it checked out before buying it, it was blowing 2.0% CO; my limit is 1.2%. I'll rebuild the carb and give it a full tune up; is this likely to be enough?
I absolutely have to meet the standard for initial registration (the car came from out of state). I can either smog it yearly, or smog it once and get an exemption for the future (with a 2,500 mile/year limit). Either way, though, I need to get it down at least once.
I have my rebuild kit, chilton, hanes, a bottle of spray cleaner, and the can of carb cleaner. Any other advice?
Thanks
hawk |
The small metal box is a crankcase breather that is taking oil vapor that the PCV is not handleing and venting to the air filter housing.
The quadrajet is a complicated beast. the most common problem is the primary power piston sticking in it's bore. the primary power piston had manifold vacuum on one side and a small spring. The spring pushes the piston up to the rich position and vacuum pulls it down to a leaner position. The piston is connected to a pair of tapered metering rods. The primary power piston can be freed up without taking the carb apart. You can see it by looking down through a vent tube in the top air horn and carefully push down on it with a small screwdriver. If it gets stuck in the down position, it will run very lean and hesitate and stall. With some experience, you can make a little tool to reach in there a hook on it and pull the piston up. If this fails you can simply remove the air horn with the card in place on the engine and get access to the primary power piston and metering rods.
For you to be happy with a 72 eldorado you need to become a quadrajet expert. There is a ton of Quadrajet information on the internet. there is information sprinkled in Corvette blogs, Pontiac blogs and Olds sites as well, So start digging before.