failing alternator cause misfire ?

[turbo-fever]

I'm at my whits end trying to diagnose a top end misfire, I have replaced all the ignition side of things. I have noticed that if I turn my headlights on my revs drop and if I press the brake they drop a lot more, which leads me to believe my alternator may be on its way out but would that cause a misfire to ?

[Amjad]

Dunno about misfire but I had the rev drop problem until the car cut out completely! Alternator replaced and now all good

[jellybaby]

Do a check on the alternator see what voltage it putting in also check the ampage

[ChrisLeeBoost]

When you say press the brakes do you mean press once or pump them a few times? I've got a low rpm issue aswell while sitting in traffic car will sometimes idle at about 800-900 and sometimes even lower I'm not sure what it is