1JZ not idling post big single + piggyback + injector install - likely causes?

[Bananaman]

Morning all

I just completed a big single swap + piggyback/injector install on my 1j cressida, and post the swap the car will no longer idle as it was.

Details of car:
-Non vvti 1j
-Ext gated ta3410 turbo
-2JZ 440cc injectors, that are untested but appear to work fine
-Emanage blue piggyback, with automatic compensation put in for 370>440cc(yes, i realise it should be 380, i typed it in wrong and now don't have a cable.. i will be getting/making one shortly)
-Bosch BOV, blocked off the part of the stock manifold where this used to plumb back to

The problem:
Car won't idle anymore. Have chucked a bit of vacuum hose on the throttle return stopper thing to increase the idle for the time being. When the car is hot, the idle increases by about 400rpm, but if i remove the vacuum line thats upping the idle, it still stalls. Doesn't appear to have any cold idle increase going on.

Questions:
-Ideas what could be causing this?
-What triggers the cold start idle up on a factory 1j?
-The spot where the factory bov plumbs back into is actually a small unit that bolts on to the side of the plenum at the very back on the head side of the plenum. What does this do?

Thanks
Bardin

[Bananaman]

Engine bay looks like this

[Cuzzo]

i wonder if the injector size where you put the wrong figure in may be the problem?

If not maybe its in the tuning? What injectors was the previous owner of the emanage using?

[Bananaman]

i wonder if the injector size where you put the wrong figure in may be the problem?

If not maybe its in the tuning? What injectors was the previous owner of the emanage using?

Surely that 10cc cockup wouldn't be the difference between stalling and not? Also, it seems happy enough otherwise, under power etc, rich if anything, the effect of my mistake would be slightly leaner.

I wiped all settings from the emanage when i installed it, before changing the injector compensation stuff. It could just be in the tuning even still, but before i start mucking with this i'd like to make sure nothing else is the problem first?

[Cuzzo]

Ahh so theres nothing to tune on the emanage? i thought fuel maps etc would need to be modified. So what did you load on?

[JZA70R_92]

check your ISCV, clean out etc also if its not to hard try and unwire the Piggy back and see how she runs?

[Bananaman]

Ahh so theres nothing to tune on the emanage? i thought fuel maps etc would need to be modified. So what did you load on?

I was hoping that the auto adjustment for injector size would be sufficient for the car to run ok, but perhaps i was wrong. This is all i changed, so all i think its done is pulled fuel at a ratio of injector size, so 370/440 = 0.84, right across the board

check your ISCV, clean out etc also if its not to hard try and unwire the Piggy back and see how she runs?

I'll clean it, but it seems odd that it'd stuff up at the same time, but i guess you never know. Its not impossible for me to unplug the emanage, but given i didn't use a patch loom i wired it in myself with crimp connectors, taking it out and putting it back in would be more than a little bit time consuming, and likely make me cause more problems

[Bananaman]

So it seems that the barb that i thought was the plumb back for the factory BOV, is actually the ISCV - so yes, my ISCV was blocked, by a hose blank I can't see how this drawing off the BOV outlet would work, so i must have remembered incorrectly as to where this went.. i'll look for exploded diagrams.

SO. Having removed this (barb is now drawing unfiltered air), and putting the throttle stop back to normal, it is a considerably happier little machine, but its still idling very low - about 500rpm (but not stalling at least, woo). I can't for the life of me see how plumbing this into my intake pipe is feasible, wondering what an engineer would think of just popping a filter on the back there...

I guess i can still clean the ISCV, but i'm thinking that whats left is probably in the tune..

[SillyCarS]

injector size shouldnt matter that much

my 1g on the lt12s base map still runs and i have 440cc injectors on it (330cc stock). its just fkn rich as and smokey as all fk. it maintains low idle too