i recently bought a used corolla from my old boss. its a 1993 corolls with 134k miles on it. my questions are, why dont i have an rpm gauge and how would i know my rpms,also why is my tank on E after around 250 miles. shouldnt i be getting more? also when i make a right hand turn i hear a scraping on my left front side. also when i accelerate i hear a pop.lol and also when i try to start my car when its been sitting itll seem like it dont want to start then eventually does btu it does not do it when its warmed up. please help me =). p.s ive already changed the oil filter and spark plugs to NGK sprk plugs.