ever since i had a new engine installed i have had my ecs light on, it used to drive fine so i wasnt worried about it until the other day it turned off when i was driving and the rpms dropped very quickly (if i didnt throttle down it would die). the light flickered on and off. whenever it was off the car drove like it was on 3 cyclinders.

driving home the car started playing up badly and i would break down at every traffic light. it started blowing copius amounts of black smoke. a pedestrian said my car is running bloody rich!!

i recently changed the disi cap and it fixed alot of problems. so i decided to do the spark plugs.

next day the ecs light was on like normal and the car drove better...i noticed a circle of soot where my exhaust is on the garage wall. its still running rich

i only managed to change 3 spark plugs coz the driver side front has the inlet manifold too close to the socket (has anyone had problems with this)

i am also running a motorbike battery - charging it the cheap way

apart from the battery and the spark plug the only thing i can think of is maybe the fuel injectors or spark leads or maybe the aav - it is kinked a bit. the reason i think the aav might be involved is because the idle drops to about 400 when warm and starts cold as normal

has anyone got any ideas?? im pulling my hair out

Checked your O2 sensor? Sounds like yours is a bit off.

 

Check the codes from your ECU and see what the ECS light is complaining about:

http://www.ultimatesubaru.org/forum/showthread.php?t=49918

 

That should point you in the right direction.

 

Good luck!