RB25 Misfire, Poor Idle, ETC :(

[FinkenS14]

Hey guys my RB is still having problems. Recently it got a really lopey idle, and sometimes, start loping so bad that it almost dies, I have to keep my foot on the gas to keep it from dieing. What could be causing this other then a vacuum leak? Because Im pretty sure its not one.

Also, now it climbs through stock boost awesome, but has a slight studder, but if I let off from just going WOT, the car will get really quiete, its still running, with my foot slightly on the gas, and then it comes back to life, then goes quiete again, then comes to life again, almost like fuel or ignition is shutting down? Im running an atmospheric BOV, could this be it?

But the thing I dont get is its fine sometimes, and other times the problem is horrible where I can even keep it at the speed limit because the throttle doesnt respond, bad TPS maybe? But how would that cause a studder?

I also grounded my ignitor to the firewall, and that didnt seem to help at all.

Im lost guys, any help would be great.

Mods

S1 RB25 S14CX Racing ICHKS SSQVGreddy IntakeStock TBYamamoto Tuned ECU (came with the motor)Walbro 255

NOTE: Im currently running an open turbo elbow till Wednesday when I get my exhaust put on.

Everything else is totally stock on the car, even the boost is at stock 7psi.

[FinkenS14]

Just found my front knock sensor was unplugged. Possible lead towards my problem?

[FinkenS14]

I pulled all my plugs this morning. Clean as the day I got them, no fouled or anything.

[virus77]

I did a customer car one time that would cut out on certain throttle inputs, even checked the TPS and it was giving correct readings. I still had a feeling it was TPS related so I swapped it out and the car started running fine.

[rb25det250sx]

dont think that could be it...my wires were cut and the car still ran fine.. just not good when its under boost dangerous.

Just found my front knock sensor was unplugged. Possible lead towards my problem?

[FinkenS14]

Alright, thanks man.

Since I plugged that knock sensor in, it seems to idle fine now too.