Good day to everyone!I badly need help regarding my '91 Corolla 4AFE engine.Super ingay kasi ng tunog ng tambutso niya.Para siyang nakikipagbarilan,literally.At first I thought it were leaks in the exhaust system that caused the noise but when I went to a muffler shop,they said there were no leaks.Palyado daw makina kaya ganun.Ipa-tune up ko daw.But I just wanna have ideas on which to check first before going to a shop.

One more thing,mula nung pina-tune up ko sya 2 months ago hard starting na sya.Mahina na battery ko that time kaya ginalaw nung mechanic yung starter to make it run.Naisip ko,baka dahil yun sa paggalaw nya dun sa starter.Baka may lumuwag.What could it be?

Hope you guys could help me or atleast give me any idea.