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Author Topic: fuel trim code  (Read 5980 times)

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birdman

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Re: fuel trim code
« Reply #15 on: 23 October 2011, 19:55:12 »
It never went closed loop,and B1S1 cycled around 5times in 15minute test,B1S2 was constantly reading around 0.075v,do you think its the o2 sensor,it was only replaced 2years ago (genuine)
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TheBoy

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Re: fuel trim code
« Reply #16 on: 24 October 2011, 17:57:52 »
Quote from: birdman on 23 October 2011, 19:55:12
It never went closed loop,and B1S1 cycled around 5times in 15minute test,B1S2 was constantly reading around 0.075v,do you think its the o2 sensor,it was only replaced 2years ago (genuine)
What is CTS reading?

Was B1S1 staying mainly rich or mainly lean (although, I think irrelevant if not going closed loop)
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birdman

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Re: fuel trim code
« Reply #17 on: 24 October 2011, 18:39:39 »
Quote from: TheBoy on 24 October 2011, 17:57:52
Quote from: birdman on 23 October 2011, 19:55:12
It never went closed loop,and B1S1 cycled around 5times in 15minute test,B1S2 was constantly reading around 0.075v,do you think its the o2 sensor,it was only replaced 2years ago (genuine)
What is CTS reading?

Was B1S1 staying mainly rich or mainly lean (although, I think irrelevant if not going closed loop)
It stays lean when open loop,it doesnt seem to be switching as it should,can you explain what CTS is?
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TheBoy

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Re: fuel trim code
« Reply #18 on: 24 October 2011, 18:57:23 »
CCoolant Temp Sensor
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birdman

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Re: fuel trim code
« Reply #19 on: 24 October 2011, 19:07:54 »
Quote from: TheBoy on 24 October 2011, 18:57:23
CCoolant Temp Sensor
Oh, ETC on mine! :D reading 87C
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TheBoy

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Re: fuel trim code
« Reply #20 on: 24 October 2011, 19:37:22 »
Not sure why not going Closed Loop then,  this is where we need a lamda junkie...   ...Kevin Wood :P
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birdman

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Re: fuel trim code
« Reply #21 on: 24 October 2011, 21:06:49 »
Quote from: TheBoy on 24 October 2011, 19:37:22
Not sure why not going Closed Loop then,  this is where we need a lamda junkie...   ...Kevin Wood :P
Its weird,if let to idle the sensor will switch ol/cl every couple of seconds but when you go out for a test flight it goes to openloop-fault where it stays!?then the mixture reads lean 0.2v from s1b1,hence the rich fuel trim code coming up! Is Kevin Wood out there! ;D
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TheBoy

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Re: fuel trim code
« Reply #22 on: 24 October 2011, 21:23:28 »
Quote from: birdman on 24 October 2011, 21:06:49
Quote from: TheBoy on 24 October 2011, 19:37:22
Not sure why not going Closed Loop then,  this is where we need a lamda junkie...   ...Kevin Wood :P
Its weird,if let to idle the sensor will switch ol/cl every couple of seconds but when you go out for a test flight it goes to openloop-fault where it stays!?then the mixture reads lean 0.2v from s1b1,hence the rich fuel trim code coming up! Is Kevin Wood out there! ;D
Eh? The sensor doesn't go Open or Close loop. Thats a processing decision from the ECU
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birdman

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Re: fuel trim code
« Reply #23 on: 24 October 2011, 21:28:49 »
Quote from: TheBoy on 24 October 2011, 21:23:28
Quote from: birdman on 24 October 2011, 21:06:49
Quote from: TheBoy on 24 October 2011, 19:37:22
Not sure why not going Closed Loop then,  this is where we need a lamda junkie...   ...Kevin Wood :P
Its weird,if let to idle the sensor will switch ol/cl every couple of seconds but when you go out for a test flight it goes to openloop-fault where it stays!?then the mixture reads lean 0.2v from s1b1,hence the rich fuel trim code coming up! Is Kevin Wood out there! ;D
Eh? The sensor doesn't go Open or Close loop. Thats a processing decision from the ECU
The plot thickens,wish I was Eienstein! :-\
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birdman

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Re: fuel trim code
« Reply #24 on: 27 October 2011, 17:12:53 »
Right,just changed oxygen sensor 1 for brand new gen vaux,same problem so not that  :'(  could a dicky crank sensor cause this prob? its the only thing that hasnt been changed!!! ;D
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