SR20DET not running right. what could it be?

[SR86]

im prettty new to the SR and im having problems already.

first of all i have a blacktop sr with E5 ECU that i put in my AE86.

when it runs, it runs rough and almost never idles on its own.
when i give it gas it tries to choke out and die. if i hold the gas pedal down it will die and when i tap it over and over it will rise in RPM but still doesnt sound right.

to me it sounds like a TPS problem or a gas problem. BTW the gas its running on is 87 or 89 octane. will that cause it to run bad?

i have not had time yet to check for codes but should later this week.

any help will be appreciated.

[drift_s13]

Better octane fuel should definitely help if it's available.

[DataXUnknown]

The MAF is a common problem. Also the gas. You should be running at least 91 octane, if not higher. Also the fuel pump should be upgraded if you haven't already, I can't imagine how small a stock AE86 fuel pump must be, lol. Get walbro 255lph and run higher octane

[SR86]

i have a 255 already installed.
ill have to try the fuel next then.

would just the fuel cause it to run like that or could it be more?

[DataXUnknown]

Most likely it is something more. The fuel wouldn't cause THAT much. Check your dizzy (timing) as well, sounds like maybe your timing could be way off