Black smoke is a sign of a vehicle running rich. I would check for a bad fuel pressure regulator, bad fuel injector or very plugged air filter.

A fuel pressure test could tell you much.

There could be a couple of reasons why water is coming from a tailpipe. There could be a blown head gasket on the car or a cracked head.

A small amount of moisture is a normal byproduct of the burning of gasoline in the engine.

It will make the exhaust come out those holes instead of the the tail pipe. Just take your vehicle to a muffler shop and have them remove your muffler and put pipe in it's place. No restriction means more flow which means higher performance, unless your talking about a 2-stroke then don't f with it.

Black smoke from an engine is caused by unburnt fuel.

The engine will have NO POWER and will not want to start or even run.

Black smoke-you are burning oil, engine is worn out. White smoke-you probably have a blown head gasket. Good luck with either one, both are expensive to repair. The above answer is only partially correct. Black smoke is not oil burning. Black smoke is an overly rich fuel mixture. Blue smoke is burning oil and white smoke is coolant in the combustion chamber.

it is called a silencer which makes the exhaust less noisier

what is bad exhaust system?

It is illegal to remove a converter from any vehicle without replacing it with a new one.

It is caused by oil getting into the combustion chamber and burning off

Often there is a sticker under the hood showing it. Could also try the dealer.

blue smoke is caused by burning of oil, oil can get into the combustion chamber through the oil and piston rings and or the valve guides would be the most likely.

Yes. If an intake manifold gasket was not installed properly or has somehow become damaged the engine will pull air through the opening.

would you mean a egr valve i worked on car about 15 years never heard of a ejr but if its a egr that would be a exhaust gas recirculation valve keep the internal combustion chamber cool while the engine running at high speeds

1.8 2000 zetec? i dont think they make that engine even for the 2000

NO

no it will not damage your car, but it will waste alot of fuel

burning oil

Exhaust

legally-none

practically-all except the PVC valve.

i would hook timing up to constant vacuum. ste base timing about 10 degrees and gofrom there.

I'm sorry, but NEVER hook the vacuum advance to direct vacuum. Always use a ported source, (above the throttle blades) If you have the vacuum hooked to a direct source you build an instant bog into the car from a stop. I fix maybe 2/3 cars a week in my Emission Shop with this problem. Been doing it for 23 years. They'll usually run with high HC at the Smog check, too.