I have a mazda B-2600 and a have a problem with it. It will not run right. It run better good down a hill then gooding up the hill. What is wrong?????[:@]

That could be just about anything, you need to be more descriptive. Does it make a poping sound, does it lug when you hit the gas, is it hard to start, sluggish at high rpm, putting out black smoke, etc..... and of course it runs good going down hill, the engine doesn't have any load on it.

It lug when you hit the gas but when you go up hill it act like it is not getting gas and some time it is hard to start.
Thanks