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#1
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Verso and bung O2
If I had a Verso tune completed with a bung Oxygen Sensor and hence was running stupid rich, should I expect the car to lean out once the O2 is replaced or will it contine to run rich due to the Verso tune?
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MY08 Liberty Tuned by STI Wagon |
#3
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I have... just need to know if it needs a re-tune to lean out.
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MY08 Liberty Tuned by STI Wagon |
#4
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Mate, they use a wideband O2 sensor when they tune the car....so changing the standard O2 sensor shouldnt matter.
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Long live the Classic! MY99 - 245hp & 360Nm.......Best ET - 12.771s |
#5
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thread hi-jack:
is a 02 sensor still needed on a ej20 running a aftermarket ecu (ie possumLink ecu)? reason i ask is because i have apexi turbo timer with a functioning air/fuel ratio meter on it and lately i have noticed the a/f ratio readings are all over the shop on light throttle (ie sometimes is will read up to 20:1, then jump up and down, only on light throttle) i believe that the turbo timer gets its a/f readings from the o2 sensor, so am i right to think that these erratic readings are due to a faulty o2 sensor? |
#6
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lean cruise is fine on light throttle....it hunts around because the o2 is doing it's job.
it will go to 20:1 on over-run as the ecu cuts the fuel as you coast to a stop in gear with the throttle closed.
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[CENTER][SIGPIC][/SIGPIC][/CENTER] [CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER] |
#7
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cheers for that Ross. i have never had a look at the readings when i am on WOT, however i am aware that those turbo timers and their a/f readings are not exactly accurate since its not reading off a wide band o2 sensor.
is there a method to check if an o2 sensor is still working fine? i have noticed my fuel economy has become worse of late, and since i have never seen these kinds of erratic readings on the a/f meter before i am still suspecting the o2 sensor may be faulty.. |
#8
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Hi John,
As you said, the standard O2 sensor (narrowband sensor) can only tell if the AFR is richer or leaner than 14.7:1....it doesnt know how much richer or leaner. so disregard the readings your meter readings you are getting. If your fuel economy is getting worse, this is usually a sign that your O2 sensor is on its way out. O2 sensors start to read 'lean' when they fail, so will then pump more fuel into the engine - hence the worse economy. i believe most O2 sensors only last 50,000kms, when was the last time you changed yours? one more thing to check, is your possumlink in a closed or open loop lamda? if its open loop, the O2 sensor wont be doing anything. so you might have a problem elsewhere. cheers, Steve
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Long live the Classic! MY99 - 245hp & 360Nm.......Best ET - 12.771s |
#9
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99-00 Afm's fail with little provocation!
What air filter is on the car?
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[CENTER][SIGPIC][/SIGPIC][/CENTER] [CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER] |
#10
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Possumlinks use the MAP sensor....so it shouldnt matter if his MAF is stuffed.
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Long live the Classic! MY99 - 245hp & 360Nm.......Best ET - 12.771s |
Tags |
bung, o2, scoobygez likes it in the 02 bung, verso |
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