240sx s13 Sr20det running rich

[Natedog444]

ok so i have a 91 240sx hatch with an sr20det swap, wireing speicialest harness, everythings stock front mount intercoolar, ka24 mass air flow sensor, and i noticed my coolant temp sensor is brocken but dont think it would cause it to run this bad!. it starts up preatty quick not to rich but can tell its burning fuel with a little put to it, timeings perfect checked with light. once u get it running it just starts dumping lots of fuel out the back run kinda bad. cant get over 3-4 k rpms when driveing. im stumped on what else could be causeing this problem i checked for and boost leacks well i sprayed everying thing down with throttle body cleaner. any ideas what could be wrong. oh and a have a 300zx maf but i cant get it to work do i need a tune for that im not useing it right now just wondering why its not working?
thanks for any help
Nate

[walperstyle]

I would avoid driving it hard until you have this figured out.

questions: what ECU do you have?
what type of fuel pump and injectors?

Note: the 300zx Maf may not be working due to voltage issues, search google on 'how to install 300zx MAF'. Lots of people have run into the same situation you have. Check the voltage you are getting from the maf

[sx moneypit]

You need to get the coolant sensor problem corrected also.It WILL affect the fuel mixture.