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A/F 29/1, ignition timing is jumping, mileage is terrible

518 Views 7 Replies 3 Participants Last post by  MoHo
2004 rsx-s. It has Hondata k-pro and after the last snow storm it has been acting funny. At some specific speeds with throttle barely pressed in it will start kind of jerking a bit and I lost 150kms range after I gassed up. Noticed that my A/F was at 30/1 while driving and at idle, but sometimes goes down to 14.7/1 momentarily. I have no idea what the problem is. Please help


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In the first picture, the green trace at the bottom of the screen (TPS 0%), is that your throttle position sensor data?
Based on that, I would guess your throttle position sensor is throwing garbage data to your ECU. Its dropping out and jumping all over. Replace it.
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