Won't start!

[jdmsilvia240sx]

Yet again, more problems. This time the car won't turn over. It will crank, but won't fire. If I let it sit for a few hours, I will get a four hundred rpm sputter out of it, but it won't turn. I have fuel and spark. I checked all of the wiring and that's in tact. Ecu is good, though it throws a code 55 (not sure what that means). Interestingly enough, my buddy came down with the same problem two days ago and I have had for nearly a week. He, being more knowledgable than myself, told me to clean the aiv. My question is this:

-Could this be the problem?-What is the easiest way to clean it?

The reason I ask the easiest way to clean it is because I have limited resources because my car is stuck in my job's parking lot. Any suggestions or recomendations would be helpful. Thanks.

[S13240]

How long was the car running before this problem occured? Probably bad alternator/starter? Battery is low?

[loudbay]

one of your injectors could be leaking... my 4th cyl leaked under pressure.... take out the fuel pump fuse under the hood, and crank it a few times... put it back in and see if it starts... you can get new injector orings from the dealer, they usually keep em in stock...