RB20DET Running extremely lean on idle. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

RickyBobbyS13 · 08-24-2019, 09:45 PM

Hey everyone. So to start, my RB20DET ran fine in my other chassis, when i swapped it to my new chassis and switched to a front mount the car runs extremely lean on idle. AEM Wideband is reading 16-17 and then so lean it wont even give me a reading. I havent found any leaks in my couplers or IC piping and cant seem to narrow down if there is a vac leak. I replaced the plugs/coil packs already but cant figure out what my issue is. Stock RB20 with an RB25NEO turbo and ISR downpipe/exhaust.

Any ideas on what else to trouble shoot? Fuel pump finally shit the bed maybe?
Thanks.

08-24-2019, 09:45 PM	#1
RickyBobbyS13 Leaky Injector Join Date: Mar 2011 Location: New York Posts: 61 Trader Rating: (1) Feedback Score: 1 reviews	RB20DET Running extremely lean on idle. Hey everyone. So to start, my RB20DET ran fine in my other chassis, when i swapped it to my new chassis and switched to a front mount the car runs extremely lean on idle. AEM Wideband is reading 16-17 and then so lean it wont even give me a reading. I havent found any leaks in my couplers or IC piping and cant seem to narrow down if there is a vac leak. I replaced the plugs/coil packs already but cant figure out what my issue is. Stock RB20 with an RB25NEO turbo and ISR downpipe/exhaust. Any ideas on what else to trouble shoot? Fuel pump finally shit the bed maybe? Thanks.