Quote:
Originally Posted by Cobb
vrmouseyd15b, whats the check engine light for? Some cases that can cause the computer to not allow lean burn if equipped and cause the fuel system to run at a default afr rate vs relies on the o2 sensor(s)
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No check engine light. that's my "lean burn indicator" / happy light. I'm on a jdm p2j series ECU. they should all have an "econo (lean burn)" light. I think it's at pin a30, and I'm sure it's a switched ground. I bring SWITCHED 12V POWER to one side of the bulb, and pin a 30 to the other side of the bulb. here's a shot with KEY ON, ENGINE OFF:
EDIT: When I said "they", I meant the p2j family of ecu's but - I'm not totally sure
my "happy light / econo light" Is above 4500 rpm, Check engine light is above 5500 rpm. I hate seeing the check engine light because you are right, check engine light = no lean burn!