I just installed a blacktop S13 motor into a '92 240sx hatch and now when I start it it will idle very rough and then will cut off. It will rev up a little but not smooth. The CAS is set properly. Anybody have any ideas? Thanks for any help.

 

How long does it stays on for?

 

It will stay running if you give it some throttle but it doesnt idle. It seems like it might be a fuel problem. I am going to check to see if I am getting enough fuel pressure.

 

Ok keep me posted

 

I found the problem! I have the wrong MAFS. I bought the car with a blacktop sr20det and the kid couldn't finish the swap so I have been piecing the car together. I thought the right MAFS was with it but it turns out that it was the stock '92 ka24de MAFS and I am under the impression that it will not work. The car idles fine with the MAFS unplugged but as soon as I plug in the '92 ka one it idles bad. I am looking for an '89-90 ka or sr MAFS so hopefully that will fix it.

 

If you have the money nows probably a good time to get a z32 maf, bigger injectors, and ecu.