R32 Gtst - Sudden Poor Idle, Down On Power, Stalling

[bryyy]

My 32 started playing up last night, only things that changed was me disconnecting the battery for about 30 mins while installing headunit, and filling up a full tank of BP Ultimate (and then making good use of 3 lanes on 2nd gear gear limiter - on a private road of course.)

Symptons:

-Poor idle, has a audible miss, idle drops occasionally

-When suddenly letting off the accel and putting clutch in, car wants to stall, and often will if i dont keep revs up

-Is noticably down on power.. seems laggier.. don't feel anything until about 4.5k rather than the normal 3k.

-Stock boost gauge has no reading (Not sure if it was working before hand, never bothered to look)

-No speedo reading.. Unrelated but it happened at the same time, what usually needs to be replaced?

Car has Turboback 3" exhaust, FMIC, pod, stock bov, stock ecu, running 0.8bar with no boost controller or anything.

I've checked cooler pipes, 99% sure theyre fine, not really keen to just go around checking random stuff in case theres a common fix for this.

Thanks, bry

[adam-__-]

I would first check the cooler pipes, but you've already done that and it hasn't fixed so check your spark plugs or your afm.

[bryyy]

Yeh will check AFM when theres some light and I have some time, same with spark plugs.. will change fuel filter just to be safe too.

[adam-__-]

Good luck mate. Hope nothing's seriously wrong.

Cheers

[jeffers1987]

sounds to me like a vacuum leak, specially if you boost gauge is no longer working. trace that from the firewall would be my first pick

[bryyy]

I meant to say that the standard boost gauge is no longer working, my greddy one is working and reading fine..

[heller44]

speedo will be the fitting on the end of the speedo cable, where it plugs into the back of the cluster

[r33nut]

Had a problem on a 32 gtst once with similar symptoms bar the miss and the knock sensor was stuffed. worth checking

[Fry_33]

I don't know if you've sorted this out yet but have you checked you CAT? It may have colapsed inside and therefore blocks the flow.

[bryyy]

Just changed the fuel filter, feels alot better now, will take it for a better drive later on. Cat isn't blocked.

How can I check the knock sensor? Or is it more of a matter of just replacing it?

Thanks for the suggestions!

[chinkeboi]

lol abit off topic but what kinda private road do you know with 3 lanes? LOL.. u mean the private roads owned by the government?

[bryyy]

Well, it was one of those privately owned roads with pretend lanes and such.