Single turbo legacy issues

[czar loc]

so I converted my legacy over the last two days and have now started it up and she runs ruff as as in video but also not showen is it then suddenly redlines for no reason. Now in regards to what has been done is replaced manifold with a complete v4sti including the loom, vf23, split rail mod, coil pack mod, equal length headers,4g ecu with 6s ecu

Now with the wireing I wired the ignitor as in gazzys write up running the two wires to the ecu(a9, a10) hardwired the ground(also tried wired into a generic groung wire) and the blue and red to the coil pack,

relocated o2 sensor to downpipe

swiched wire to read correct bcs

cheaked that cam and crank sensor are round the right way witch thay were,

now in stumped, any ideas appreciated, cheers

[Rosssub]

Are you using twin OEM fuel pressure regulators? Or an aftermarket FPR with a gauge?

The only time mine has tried to redline, is when I didn't fit the accelerator cable properly at the TB. Is your throttle plate closing completely at idle?

[czar loc]

2 oem regulars and yes is secured, when it redlines visually the throttle were the cable attaches dose not move

[Rosssub]

Is the throttle plate/butterfly completely closed at idle?

[czar loc]

Yes tried it slightly open, and completely closed,

[Rosssub]

The IACV on the new manifold might be stuck wide open? Maybe try cleaning it out or swapping it over?

[ADIKT]

My old coupe had a problem where I would be driving around - pull up to lights and put clutch in and the revs would rise to redline unless the engine is killed

Problem would disappear after a few pushes of accelerator (engine off)

Happened a couple times before I found the small little rubber bung thing on throttle cable had slipped down and was holding throttle plate/butterfly open

Simply slid it back up and put it back in place and never had the problem again!

[czar loc]

Just detached throttle cable and she runs better at 2400rpm holding, dropping off to 600rpm, but got a new cel 24 ( iacv) , this which when I replaced was clear of any crud, but will swap over incase it is bung, cheers Rosssub hope this fixes my problem. Will do once rain stops and let u know how I got on.

[Rosssub]

Sweet hopefully that's it. For it to redline with the throttle closed, something is letting a lot of air in.

[czar loc]

Cheers Rosssub,

swaped over old one a bingo, actually runs smooth and purrs nicely,

[Rosssub]

Mint. Time for a test drive.