autronic sm4 AFR issue - evolutionm.net

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autronic sm4 AFR issue

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Apr 30, 2008, 07:15 PM	#1
rx6rs Newbie Personal Sales Rating: (0) Join Date: Jan 2007 Location: singapore Posts: 1 Drives: evolution 9rs	autronic sm4 AFR issue Hi guys, wondering anyone had clues of what is happening to my evo9 AFR as it isnt stable after full-tuning had been done to it? i am running a SM4 standalone ecu with about 400whp but 2 mths after my tuning, the ecu leans out on the lower rpm(fr 1500rpm till 3000rpm). so i sent it to back on the dyno a week later and did a power run. Lost whp now as the AFR map shown a Rich out effect. i heard of friends who had such encounters with the sm4.. just wondering if anyone had clues to rectify it ? cheers
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