Rotoridse

What's up guys. I got a 1988 Rx7 Turbo 2. I love my car and I want to start building it up to become a speed demon, but I have a problem with the car. The car has problems starting up. There are times when it would start up in one try, but other times it takes like 7 tries! It's horrible. I have a feeling it's one of the fuel injectors that are leaking and is giving to much gas to the chamber not letting the spark plugs ignite. If anyone can please help me out it would be much appreciated because i don't want to take my car to mazda and have it diagnosed and pay i bet a lot of money for it. Thanks!