Re: Renault Clio 1.2 8v 1996 runs too lean. Archived Message
Posted by Michael Whitworth on November 18, 2007, 9:47 am, in reply to "Renault Clio 1.2 8v 1996 runs too lean."
Hi Peter, Is this a Clio 1 as I would think it is, going off the year, also what serial equipment are you using as I am sure these display fuel trim in raw data block learn similar to vauxhalls. If so then LTFT should be 128 and STFT should be 128 too, all being well. so if we look at your figures, the LTFT reading odf -100 may well be just 100 meaning the ECU is trying to reduce fueling. and a STFT of 91 again suggests ECU is reducing fueling, therefore ECU thinks it is overfueling. have you checked o2 sensor volts with a meter/scope or just live data, the answer to this question would help. Also is the exhaust system OK?Maybe fuel trim needs resseting but just disconnecting ECU should do this. It does sound like an ECU fault to me. HTH Mike
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