So i traded my old car for the DA with a b20 in it.. it was leaking fuel from the fuel pressure regulator so i tighten it and now when i give it full throttle around 4.5 rpms it cuts out hard core.. i replace the spark plugs and it still does it.. also the idle is all messed up it jumps up and down from 1 to 1.5 and sometimes to 2 rpms.. and im curious about where the tromstat pug is at on the wire harness cause i can not find it anywhere.. thanks for all your help in-advance..

 

1. do you have a check engine light
2. check the grounds
3. is the wireing harnness hacked or is stock
4. what ecu are you useing
5. is it obd0 or obd1 or obd2 ??????

answer

 

idle air control valve probably messed up. the thermostat issue probably if you cant find plug it aint there.