AUDM 90-91 Rs's are coil on plug too (and they're prone to cracking).


Maybe going lean on cold nights with 14-15 psi, depending on how lean it was going in a warm dyno room?
CAI can interfere with airflow meter accuracy too (ask damo).

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[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

Indeed - You need 65mm CAI to keep it consistent with the stock AFM.

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Should have bought an STI

-mbc
problem solved

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MY93 Impreza GX 1.8L, 0hp, 0nm

Sean said that the mbc was working better than the stock solenoid - he actually refitted it on the dyno.

Was dynoed on a mid 20 degree day at allstar.

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I am only an asshole on the internet :)

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TJ: Do you reckon it would lean out more on a cold night?

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[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

Nah it has a brand new... well now 8 month old walbro in it so tons of flow, and had plenty of headroom at 13psi on the dyno.

2 psi wouldnt stress it - but Im assuming its either hitting boost cut on the coils are breaking down.

From my understanding the coil on plug coils are actually old RS ones not the ones Taylor here thinks.

Id be looking there first.

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I am only an asshole on the internet :)

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I'll be checking AFM, as I know where the intake runs into guard, the silicone is compressed, crimping it in a way.

I'll be replacing plugs too, as i had CEL code 21 for quite some time (which is finally alleviated) - which naturally enrichened the mixture and has probably fouled them to some extent.

As for the coils, now that TJ has said that I'll definately be sourcing some bosch units.

Thanks for all your input - I'm getting my head around things.

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03 STi @ 280hp/1.3bar

Plugs were fouled

NGK Platinums went in Coils are fine.

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03 STi @ 280hp/1.3bar

i love a happy ending