Idle not level and weird gearchange issue when cold

[Guest]

Hey folks,

I've noticed a few odd things about my car over the last few months.

It's a 97 SF5 Turbo Forester and as far as I'm aware, it's stock.

I've recently replaced plugs with NGK Iridium's, replaced fuel filter, o2 sensor, knock sensor (was throwing codes), fuel pump (was buggered when I bought it).

Now there's only a few issues left

1) Idle is never stable. It's all over the place from around 500rpm to 1k.

2) My boost gauge fluctuates. I have a video of what I mean;

3) Upon deceleration, I hear a gurgling or popping noise from my exhaust.

4) When cold and changing between Neutral and first (when taking off) and then again between first and second, there's quite a lurch (even when gentle as hell on the clutch) almost like it wants to stall, then it just picks back up again and off we go. When I've warmed up a bit, this issue disappears.

On the cards is a MAF replacement (I'm about to crack 230k and I heard they're meant to be done every 70,000ish, I doubt it's been done before I bought it either).

Anyone have any ideas?

Cheers,

-Ewan

[Timmah]

Would be trying another known working AFM.

[Guest]

Gave the dealer here in Palmy a call today. $595 for a brand new AFM. Seems steep!

Is there a way to get these tested and/or any members around Palmy want to lend me one for testing purposes? ?

[RA_Jay]

they have reconditioned 1's on trade me for around 200? what colour AFM does your car run?

[Guest]

Purple, I took a look and couldn't find any. I might be slightly retarded when it comes to searching for parts (I'm not mechanically minded).

[RA_Jay]

i dont know if strong for subaru send stuff. but maybe you could give them a ring. but 600 bucks for a new 1 sounds realllllllyy steep.

[Guest]

Okay, got a MAF, that fixed the idle issue and the gearchange issue.

However, the boost gauge fluctuation is WAY more pronounced now (srsly jumps around, sometimes almost up to -10) and the gurglign is still present, though not as pronounced.. Any ideas?

[slystiguy]

vacuum leak?

[Guest]

Is there a retards guide on how to check the hoses n what hoses to check somewhere? ;D ;D

[Trent]

gurgling could just be little back fires through your exhaust my car does it heaps but i have not 1 muffler its only pipe but then again it did it (granted alot less) even when it still had just the cat convertor and no other mufflers but its never worried me and its done 20thoukms like that