Toyota MR2 Message Board - View Single Post - Beams Swap

turnip · 10-25-2009, 08:33 PM

I agree that the ECU will act in default mode if it does not sense a key sensor. In this situation from what I have read it stays in open loop and runs the default fuel maps and timing. Typically you see the ecu go into limp mode on detonation and or if it senses knock. This happened once or twice on my turbo IS300 which had a similar setup to this Beams in that is was a single VVTI.

Now I believe you are correct in that I will not gain the maximum potential of this setup based on the ECU not being able to learn and trim the maps accordingly. Based on a couple runs I made up the road today its definitely not in limp mode or retarding timing. It sounded and felt good. I plan on having it dynoed shortly.

10-25-2009, 08:33 PM	#34 (permalink)
turnip No Skills Join Date: Sep 2009 Posts: 27 Thanks: 1 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	I agree that the ECU will act in default mode if it does not sense a key sensor. In this situation from what I have read it stays in open loop and runs the default fuel maps and timing. Typically you see the ecu go into limp mode on detonation and or if it senses knock. This happened once or twice on my turbo IS300 which had a similar setup to this Beams in that is was a single VVTI. Now I believe you are correct in that I will not gain the maximum potential of this setup based on the ECU not being able to learn and trim the maps accordingly. Based on a couple runs I made up the road today its definitely not in limp mode or retarding timing. It sounded and felt good. I plan on having it dynoed shortly. Last edited by turnip; 10-25-2009 at 08:47 PM..