Splintercellsz

I posted in the engine section, but haven't received many answers. I'm really wanting to get this car back on the road.

Hello,
I have searched google, and posted on the stickied post for the SR20s to no avail.

My SR20DET was running fine until yesterday. The engine began idle surging, bogging under throttle, low idle, and fluctuating between very lean (17-20 on the wideband) with the occasional rich spike showing. The car builds boost fine, but still shows 16 on the wideband, until the bov does its thing, which causes it to spike out the wideband on the rich side.

Occasionally the car will be fine, but the issue arises again. I did find that the Blitz BOV was sucking in a tiny amount of air at idle.

I've changed the fuel filter, plugs, cleaned MAF and throttle body. The only leak i have found is where the flex pipe has torn open, could tthis cause this issue?

I'm stumped on what is going on. If anyone can point me in the right direction, it would be much appreciated.

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