R33Beech Posted September 28, 2023 Report Share Posted September 28, 2023 I’ve seen some topics on this that say any relay that turns on with ignition. Any there some that are better than others to get the most accurate readings? Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 29, 2023 Report Share Posted September 29, 2023 The power supply wont affect accuracy. However its good to have as stable voltage as possible as many of the sensor tests that the CAN lambda performs to confirm the sensor is good rely on it being stable. I dont know the R33 chassis well enough to suggest a particular relay, but you could look at a wiring diagram for a relay that gets its power as directly as possible from the battery and with no "noisy" devices connected such as ignition coils etc. Quote Link to comment Share on other sites More sharing options...
R33Beech Posted September 29, 2023 Author Report Share Posted September 29, 2023 Okay thanks! In my one day of research so far, I can’t seem to find relay wiring diagrams. I asked because my lambda readings were around .68-.70 at idle with lambda table set for .90. I set my injector size, dead time, and pulse width (taken from ID’s website). I was leaning the mixture out and the reading randomly jumped from .88 to 2.1 lambda. Somehow the car didn’t die, I started adding back in and it jumped back to .84. so maybe I chose poorly on the relay? Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 30, 2023 Report Share Posted September 30, 2023 As I already said, the power supply wont affect the accuracy. If the lambda is working without reporting errors then it has an adequate power supply. If the engine is running with 2.1 lambda being measured then it is likely an air leak or a misfire pushing oxygen through the exhaust. R33Beech 1 Quote Link to comment Share on other sites More sharing options...
R33Beech Posted October 3, 2023 Author Report Share Posted October 3, 2023 Thanks Adam, I’m checking for air leaks now. Thinking that’s what it is. I’ll let you know what I find. It runs super rich at idle, I touch the throttle and cuts off Quote Link to comment Share on other sites More sharing options...
R33Beech Posted October 3, 2023 Author Report Share Posted October 3, 2023 Couldn’t find any vacuum leaks Quote Link to comment Share on other sites More sharing options...
Vaughan Posted October 3, 2023 Report Share Posted October 3, 2023 2 hours ago, R33Beech said: Couldn’t find any vacuum leaks You're looking for exhaust leaks upstream from the sensor or nearby downstream of the sensor Quote Link to comment Share on other sites More sharing options...
R33Beech Posted October 3, 2023 Author Report Share Posted October 3, 2023 Thanks! I’ll take a look today and check all Vband connections. Quote Link to comment Share on other sites More sharing options...
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