 AFR reading lean at Idle and 'normal' driving |
 Sep 6, 2012 - 2:28 AM
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 Enthusiast  Joined Nov 24, '07 From Tucson, Az Currently Offline Reputation: 2 (100%)  |
Hey everyone,
I am trying to find out why my afr has started to lean out during idle and normal driving. when under boost and load it will rich completely to 10 and --- green (under ten) but if I let it idle it will lean out to 17.9 then stay at --- red (total lean reading) when I had replaced the oil and water pumps, and after re-timing I got perfect 14-15 ratio. but since then (April) it started to lean out and slowly drop since early august. I also even get a little hiccup when the car gets into low rpms and at idle. and thing I should look at to try and fix it? Thanks everyone, Kevin |
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Replies
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Sep 20, 2012 - 3:14 PM
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 Enthusiast Joined Aug 31, '02 From Philadelphia, PA Currently Offline Reputation: 8 (100%) |
QUOTE (Soulend @ Sep 20, 2012 - 3:35 PM)  its an AEM UEGO wideband. a friend of mine said its normal, but I have a feeling its not. not after a few months of it running around 15, then suddenly dropping. Its possible that the sensor needs to be replaced. I've replaced mine a few times over the years. When it starts to go bad, youll notice that the gauge will not read richer than 14.7 under boost. so go see how it behaves under boost. It should go into the 10s or 11s if its working correctly. You can get the replacement sensors online for about 50bucks. This post has been edited by lagos: Sep 20, 2012 - 3:22 PM -------------------- 15PSI - 30MPG - Megasquirt Tuned
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Posts in this topic
Soulend AFR reading lean at Idle and 'normal' driving Sep 6, 2012 - 2:28 AM
Smaay what engine? if its a MAF car you have a vacuum le... Sep 6, 2012 - 11:01 AM Special_Edy Like smaay said, a vacuum leak, defective MAF or M... Sep 6, 2012 - 11:12 AM Soulend Thanks Guys,
it's a 3rd Gen 3S-GTE.
I have a ... Sep 6, 2012 - 11:39 AM delusionz stock ecu? what happens if you unhook the battery ... Sep 15, 2012 - 9:55 AM lagos Do a boost leak test and check for any cracks in y... Sep 15, 2012 - 10:08 AM Syaoran Kinda weird but it sounds like your gauge is actin... Sep 15, 2012 - 12:13 PM bsamps4 My car has a similar symptom. It will start acting... Sep 15, 2012 - 1:33 PM bsamps4 BUMP on this I want an answer Sep 19, 2012 - 7:50 AM soulshadow Narrow band O2 sensor or wideband?
If your still r... Sep 20, 2012 - 4:10 AM Soulend its an AEM UEGO wideband. a friend of mine said it... Sep 20, 2012 - 2:35 PM delusionz changed your fuel filter? Sep 20, 2012 - 8:38 PM soulshadow A leaking exhaust will cause it to lean out too... Sep 21, 2012 - 12:51 AM
bsamps4 I smoke tested my car the other day and found a fe... Sep 21, 2012 - 9:45 AM |
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