SR20DET problems (link storm)

[Zenki]

Hey guys, I'm starting up my first topic on this forum because I've run into some problems with my sr. 

Earlier this year my car broke down (2 rocker arms snapped) I fixed it by replacing rocker arms and camshafts. 

After the repair i took the car for a test drive and as soon as i get full boost it feels like the engine is just cutting out, This only happens att 3900rpm at all gears no matter how much throttle I use.

Has anyone had the same problem? I'll post my logg down bellow. 

Cheers.

s14 logg.llg

[Rossobianconero]

I dont see lambda on your log, is the engine misfire at that rpm?

why you brake 2 rocker arms? cause if you dont know why it may happen again

[Zenki]

1 hour ago, Rossobianconero said:

I dont see lambda on your log, is the engine misfire at that rpm?

why you brake 2 rocker arms? cause if you dont know why it may happen again

Yeha I don't know why the lambda isn't showing in the log, no it feels more like a rev limiter... 

I don't know what broke them, probably too much play in the shims.

[Adamw]

18 hours ago, Rossobianconero said:

I dont see lambda on your log, is the engine misfire at that rpm?

The G4 ECUs, didnt use the Lambda 1 parameter, they used "Wideband 1".  Still it is not working in the log, it just shows 7.4AFR the whole time.

 

17 hours ago, Zenki said:

I don't know what broke them, probably too much play in the shims.

Valve float or ignition cut limiter with aggressive pops can cause the SR20 rockers to jump off.  They usually break after they jump off.

 

There is nothing obvious to show the misfire in the log.  It would be nice if you got the wideband working.  Have you checked all the basics like fuel pressure, base timing etc?