if you have a carborator, it may have to be adjusted
cause he is stupid
Power brakes use engine vacuum to get their power. If the engine is out of tune, the loss of vacuum will cause it to run rough. Try changing the spark plugs.
Pressure test the convertor.
Check engine light, low power, no start, runs rough, bent valves,Check engine light, low power, no start, runs rough, bent valves,
A timing chain, that needs to be replaced, can cause your engine to run rough and lose power. A broken timing chain can cause significant engine damage.
Most likely your alternator.
No, on a fuel injected engine it can cause high idle speed.
A faulty gas cap could cause the check engine light to come on but it would not cause a rough idle or engine noises. Start with having your local auto parts store read the codes. The codes will help determine why the check engine light is on.
I blown head gasket can cause an engine miss which one cause a rough idle.
It can cause a rough idle. And it will also cause the engine to die when coming to a stop at times.
incomplete combustion of fuel
A bad fuel cap can make your check engine light go on. It shouldn't cause your car to run rough or die.