legacycentral bbs

So I just got my new engine in and it was running fine except for the crappy idling. It would idle from between 2.5k and under 500 rpms. It had no relavence to car temperature and it was completely random. So I figured it would he the iac, so I swapped it out with the one from my previous engine since it was good. Turned the car on and taadaa, it was idling right on top of the 750rpm mark. Burped the coolant lines. Then drove around the block and got into boost a couple times and everything checked out aye-ok.

Took it out on the road and pushed it a bit and after awhile, it started feeling like it was loosing power... I checked my boost gauge while I floored it and it was boosting to 15psi (I had it set at 12psi) but it wasn't pulling at all! It was fuel cutting and I was just flooring it from 3k and it would fuel cut before I got to 4.5k rpms...

My CEL also came on and it was turning on and off while all this was happening. I'm gunna pull the codes tomorrow and see what shows up.

Any thoughts would be appreciated, thanks.

No sense in shooting in the dark..

Pull codes first then we go from there

Pulled codes and I got one... Code 22 - knock sensor.
Replaced it with a known working knock sensor from another running ej22t engine and it still had the same issues with it boosting but not pulling. Got the code again too. The wires for the knock sensor are all fine as well

Did you clear the code?

And I'd recommend testing the KS wiring from the connector to the ECU. I've seen a few that were cracked @ the connector and needed replaced. Esp. since you were in that area when you replaced the engine. Use microphone wiring to fix...look it up on here.

GL,
TD

okay.... so we actually replaced the coolant temperature sensor hehe yep..

But then we found out what the knock sensor actually looked like!! And we swapped that out real quick and taadaa! it is idling correctly, cleared the cel's and now it shows none, and it can pull to 12psi!!

So it works great but the wires look a little shady for longevity so I think I'll redo that soon.

And now my turbo is dying I believe cause it was first whining like a cross between a crying kitten and a old fashion cartoon character screaming its head off. Now its boosting to 12psi but will go down to about 8-9psi between 3k to 4.5k rpms at WOT

I have a couple of VF11s for sale. PM for details.
TD

I'm actually looking for another td04 cause it's what i have on my current setup! Thanks though

If the wiring on the knock sensor wire is working, I'd probably suggest not messing with it.