Lately my car begun to blow out a lot of black smoke, I know that the fuel mixture is then rich, but I have not done anything to the car it just suddenly started to do that.
Also I had to pass the tehnical inspection last week and the CO reading was way high (10 -the machine coul not read any higher numbers), luckily the guy who inspected the car is a friend, and he revved the engine up (2900 rpm!!), wich made the CO drop to a normal level and passed me. Also when I feel the exhaust with my hand it feels wet.
I am not shure jet but I think I am getting horrible gas mileage also! (Havent had a chance to test it jet).

Whats going on?
Please help!

Oh jeah the engine is a 350 with a Holley carb.

 

Sounds like it's extremely rich.

I'd check the carb. Your problem is probably a blown power valve, on the primary side. They fail suddenly, when their diaphragm ruptures; often as a result of a backfire into the intake. One backfire can destroy the valve. This valve has a rubber diaphragm about 2 cm in diameter, with fuel on one side and intake manifold vacuum on the other; when it fails, massive quantities of fuel can be sucked into the intake.

It's normal for the exhaust to feel somewhat "wet", since one of the normal by-products of complete combustion is water. Obviously the more fuel the car is burning, the more water there will be; so it may feel more "wet" than it should.

 

:hail: Thanks, I have to look into that! Any idea is there somesort of a repaire kit available, and where can I get it?

 

If that's what it is, you just need to replace the power valve. You should probably get a rebuild kit instead, since you'll probably need some gaskets too, and the valve and gaskets are all included in the kit.

http://www.holley.com/HiOctn/ProdLine/CarbList.pdf

to find the kit part # for your carb. Summit, Jeg's, etc. will have the kit.

 

Thanks for all your help!!