ka24de bad idle

[nky s14]

Hi I have a 1995 240sx, when I start it up it idles fine after about 2 mins it drops from 1100 to 500-600 and then dies out. I don't have a downstream 02 sensor, I cleaned the IACV. I cant think what it could be.

[rawgarage]

MAF? What happens if u keep the rpms up

[nky s14]

If I keep them up its fine is the maf the black box on my cold air intake

[jedi03]

fuel filter maybe?

[nky s14]

Would that cause the rpm's to break up around 5k?