burst into flames

[mechrider89]

what the title said, I have a mk2 with a 5mge and I took the intake system apart for a clean up to make it run better (good thing to it was dirtier inside the intake then the whole engine was). I put it all back together put my new battery in double checked everything and turned the key, cranked for awhile as the fuel rail pressured back up then just as it fired the distributor area burst into flames.......anyone got any ideas or answers on what could have went wrong?

Thanks in advance.