 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 6, 2012 - 11:12 AM
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 Enthusiast Joined Oct 29, '11 From Haltom City, Texas Currently Offline Reputation: 1 (100%) |
Like smaay said, a vacuum leak, defective MAF or MAP(the mafs are real finicky) a bad O2 sensor or a bad AFR meter.
If you hook a diagnostic scanner to the OBDII port, supposing you have one, you can read the long term and short term fuel trim as well as the MAF/MAP readings |
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 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 lagos QUOTE (Soulend @ Sep 20, 2012 - 3:35... Sep 20, 2012 - 3:14 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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