Ok... I'm going to help with this because I can see that it's frustrating not on ly for you, but for folks who are trying to read it.
First thing, first. You should type like you talk. You need to place you punctuated puases into the sentence just like you were saying it. Only valley chicks from California with names like Trixie, talk the way that you type. If you're not sure if what you've typed makes sense then you should read it back to yourself out loud to ensure that resembles normal speech. Something like this:
No. I don't street race. I only do that at the track. This is what happened: I was coming home from the part store. I'm replacing my gears because my stock gears suck. I see this hot girl in a red Z28. She looks at me and I look right back. Just as soon as I pass her, I see a truck turning into shopping center so I stop and wait. When I look up, I see that she is right behind me. Just as soon as the truck is clear, I smile at her and punch it. Due to my hearing and how small the road is, I never hit boost but still manage to put a car length on her... not bad for an old T-bird motor. As I'm leaving she slowly rolls by me with this look on her face:
the end
Type it how YOU speak, not necessarily how I do. If you go back and read what you originally wrote and think that, that is how you speak then you are either not being honest with yourself or are very difficult to understand during conversation. Hope this helps.