Question: I have a Buick 1996 Century it was having problems starting so i checked the battery terminal to clean it and it arched so did i blow the ignition fuse... the car will not start anymore all lights work just fine... and oh ya i cant find where the fuse for the ignition but i did find the spot where all the fuses there is a spot for fuse but no fuse but it seems weird car was starting with out the fuse.... All before i cleaned the battery terminal.

Answer: There is no fuse just for ignition. You  may have blown one or more fuses. You need to check all the fuses with a test light, or remove each one and look at it. See this link to check fuses.If you see a spot that has no fuse in it, don't worry about it. That is not your problem. Different models have different options.

There is a fuse box under the hood and one in the dash. Check them all. I m sure that is the only problem. One or more fuses are blown.

For the original problem, having trouble staring can be many things. We would need to know if the engine cranks and wont start, wont crank, starts and dies, etc. We need to know exactly what is going on to be of any help. Hard starting is really a generic term.

Engine Revs Up And Down

2003 BUICK CENTURY IN PARK AND RUNNING WHEN GAS PEDAL PUSHED ENGINE REVS HIGH AND LOW REPETIVELY TILL I TAKE FOOT OFF GAS

Answer: This is called the "Rev Limiter". This is a normal condition. The RPM's go up to a set point then the computer (PCM) limits it and cuts the engine power down to a set level, then allows the engine to rev up and so on. This is to protect the engine from over revving which can damage it. This will happen in park or neutral but not drive range or reverse.