what controls the idle o2 setting ?
25 April 2005, 08:38 PM
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what controls the idle o2 setting ?
my car is running really rich on idle - up in the greens on the lambdalink and a bit of black smoke.
is there any sensors i can check ?
have put in a new O2 sensor - no change
Car is runing an Apexi PowerFC
doesn't seem to be going closed loop ? ?
Or am i talking rubbish !
Iain.
is there any sensors i can check ?
have put in a new O2 sensor - no change
Car is runing an Apexi PowerFC
doesn't seem to be going closed loop ? ?
Or am i talking rubbish !
Iain.
25 April 2005, 11:47 PM
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My car running rich at idle too! Especially when the engine is cold, you can see the unburnt fuel coming from exhaust. I checked to see the actual AFR readings at idle - Closed loop 14.7, Open Loop: 12.80 - MAF readings 1100 mv
26 April 2005, 09:04 PM
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Originally Posted by SoNiCa
My car running rich at idle too! Especially when the engine is cold, you can see the unburnt fuel coming from exhaust. I checked to see the actual AFR readings at idle - Closed loop 14.7, Open Loop: 12.80 - MAF readings 1100 mv
What are your WTR Temp settings?
Tony.
26 April 2005, 09:31 PM
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Originally Posted by IPALMER
Andy - when warm about 1500 mv
what should it be ? ?
what should it be ? ?
When the maf fails it loses its range ie it reads too high and runs rich at idle and reads low and runs dangerously lean when on power.
That would explain why the ECU can't get closed loop under control at idle.
Andy
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26 April 2005, 09:33 PM
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Sonica, do you actually get black smoke ? or are you referring to the whiteish condensation mist ?
As Tony said, your closed loop figure is bang on and open loop is acceptable for a cold engine.
Andy
As Tony said, your closed loop figure is bang on and open loop is acceptable for a cold engine.
Andy
26 April 2005, 09:56 PM
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Originally Posted by Andy.F
Sounds like your maf may have gone Iain. They should be IRO 1300mv warm idle.
When the maf fails it loses its range ie it reads too high and runs rich at idle and reads low and runs dangerously lean when on power.
That would explain why the ECU can't get closed loop under control at idle.
Andy
When the maf fails it loses its range ie it reads too high and runs rich at idle and reads low and runs dangerously lean when on power.
That would explain why the ECU can't get closed loop under control at idle.
Andy
I'll be driving like miss daisy for a coupla days then untill i can get a New one !
a bit worrying that it was on the rollers sat at 306 / 319 ! !
26 April 2005, 10:42 PM
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Tony, no mappers in here so I'm trying to optimize my own PFC. No black smoke, but whiteish smoke when cold.
Today I checked it again with a warmed engine. It reads 12.20 in open loop mode and the car starts to vibrate in a while at idle. I have never tried to change any cells of the fuel map because i dont belive that I'm using the right settings for MAF and injector scalings. It seems afr readings at high revs and loads are quite fine.
Today I checked it again with a warmed engine. It reads 12.20 in open loop mode and the car starts to vibrate in a while at idle. I have never tried to change any cells of the fuel map because i dont belive that I'm using the right settings for MAF and injector scalings. It seems afr readings at high revs and loads are quite fine.
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