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The BMW Range
5 Series
o2 sensor Test
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<blockquote data-quote="suren2485" data-source="post: 743886" data-attributes="member: 22162"><p>I'm driving an e39 523i with M52TUB25 engine. right now the issue i'm experiencing is bad fuel economy and poor low end torque. </p><p></p><p>Replaced parts:-</p><p>idle control valve</p><p>vanos seal</p><p>spark plugs</p><p>ccv valve and all the hoses</p><p>intake cam sensor</p><p>exhaust cam sensor</p><p>Airflow sensor</p><p>crank sensor </p><p>fuel tank breather valve</p><p>fuel filter</p><p>Disa valve</p><p></p><p>But the issue is still there, i suspect its the o2 sensor thats not giving proper air fuel mixture info to the ECU. but before i replace the o2 sensor any way to test it. </p><p></p><p>I so notice petrol smell from the exhaust when idling. </p><p></p><p>Any advice would be appreciated</p><p></p><p></p><p>Sent from my iPhone using Tapatalk</p></blockquote><p></p>
[QUOTE="suren2485, post: 743886, member: 22162"] I'm driving an e39 523i with M52TUB25 engine. right now the issue i'm experiencing is bad fuel economy and poor low end torque. Replaced parts:- idle control valve vanos seal spark plugs ccv valve and all the hoses intake cam sensor exhaust cam sensor Airflow sensor crank sensor fuel tank breather valve fuel filter Disa valve But the issue is still there, i suspect its the o2 sensor thats not giving proper air fuel mixture info to the ECU. but before i replace the o2 sensor any way to test it. I so notice petrol smell from the exhaust when idling. Any advice would be appreciated Sent from my iPhone using Tapatalk [/QUOTE]
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