When i started the car yesterday and today, it would idle fine for 5 seconds, then completely die. would even happen twice. but once it warmed up a little, gave it slight gas, it would idle fine. when i start it up when its warm, i had no problems. only on immidiate cold starts.

The car was also not producing boost. I drove it into the garage to do a boost leak test, and found the coupler on the y pipe was torn to hell. I replaced that and also the spark plugs at the same time.

After that work, i started it and it sputtered like hell on any idle, cold or warm, it drove alright once it went under load, but the 3k rpm hesitation is way more pronounce and stumbles inbetween 3 and 4k rpms.

Thought it was the ems learning to idle without a gaping hole in the coupler so i disconnected the battery for a while, that did nothing.

Im gonna check and adjust the tps tomorrow and see if that gives me results. Does anyone have anything else in mind i should be checking on?
Basically every theard about sputtering says to check tps

 

Btw I only have intakes and a smic upgrade. everything else is stock

 

Check the hose to the map sensor.

 

Image for reference.
Bonzai is likely right on this. I had the same symptoms as you explained. turns out it was this hose.

 

Thanks guys, you were dead on the money. It says, sensor-boost. Is that the MAP sensor?

 

Yes.