Need Help Going from Standalone Back to Stock - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

derass · 10-30-2016, 10:21 PM

Quick back story: Bought the car 5+ years ago with a stock SR swap. Ran damn near perfect. Upgraded to Haltech, 550's and a GT2871R. Now I've put the stock ECU, injectors, MAF and turbo so that I can sell the car.

Everything went pretty well, it's just that the car doesn't run exactly like it used to years ago when I got it stock. It's idling rich (10-12 AFR) and misfiring a bit when the engine speed is increased.

Is there some kind of re-learning process the ECU needs to go through? I had to reset the ignition timing. But how about the TPS? Or idle? Something else?

I'm thinking the car might need a boost leak test, because the Haltech used MAP so minor leaks did not make a difference. Being on MAF again, it does.

10-30-2016, 10:21 PM	#1
derass Zilvia FREAK! Join Date: Jun 2010 Location: Toronto, ON Age: 37 Posts: 1,182 Trader Rating: (0) Feedback Score: 0 reviews	Need Help Going from Standalone Back to Stock Quick back story: Bought the car 5+ years ago with a stock SR swap. Ran damn near perfect. Upgraded to Haltech, 550's and a GT2871R. Now I've put the stock ECU, injectors, MAF and turbo so that I can sell the car. Everything went pretty well, it's just that the car doesn't run exactly like it used to years ago when I got it stock. It's idling rich (10-12 AFR) and misfiring a bit when the engine speed is increased. Is there some kind of re-learning process the ECU needs to go through? I had to reset the ignition timing. But how about the TPS? Or idle? Something else? I'm thinking the car might need a boost leak test, because the Haltech used MAP so minor leaks did not make a difference. Being on MAF again, it does. Last edited by derass; 10-30-2016 at 10:51 PM..