6bolt first start idleing lean

[jlado13]

Started my fresh 6bolt up today with a 2g head. AEM UEGO was pegged lean cause fuel pressure was low. Upped the fuel pressure to the proper setting. Now the wideband bounces between stoich and lean... I have a 255 fuel pump and 650cc injectors. The AFC NEO settings for 1k are -6. Vacuum/boost leak maybe? The car held idle and all, but was a little sloppy. I was expecting to start up rich, that's why I'm a little confused.

Thanks

 

[snowborder714]

Your wideband will bounce between stoich and lean. This is because the ECU is constantly trying to adjust the air/fuel mixture. As long as your fuel pressure is at 43.5psi (with the vacuum line off), that's fine. I'd do a boost leak check next (at turbo inlet and at throttle body).

Glad to hear the new motor started up!

 

[jlado13]

Okay. I understand it may bounce a bit cause of the ecu. I just wanted to clear up the leanish idle. But this is normal? Just wanna be safe, that's all. Thanks.

 

[snowborder714]

Why not take a log of it and post it up? I'm sure someone would be able to help you out (I'm not familiar with pocketlogger).

 

[jlado13]

I'll post one next week. The place who finished up my timing belt messed up. The car was idling for less than 5 minutes and the belt has already slacked up completely. So I can't start it up again til they fixed their mess up.