CAr wont start help please

[RR_180sx]

OK 90 240sx SOHC. Ive got spark,fuel, and it cranks but wont turn over. While cranking it smoke starts billowing out exhaust and then a pop and fireball shoot out:rl: . Any ideas on whats going on? Thanks.

[Realnez]

well it sounds like your running rich, check you maf

[300ZXMike]

The fact that your running rich opens a lot of possiblities. I would start with the maf. It could be your ecu, o2 sensor, or a lot of other things. The maf would be the best place to start.

[Vision Garage]

if the car is throwing codes, it would be a good place to start at.