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The BMW Range
5 Series
E39
Power Loss at low rpm
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<blockquote data-quote="willy5" data-source="post: 545010" data-attributes="member: 2319"><p>Thanks All for the good advice.</p><p></p><p>The fuel filter was changed also, no improvements</p><p>Sensors for inlet and exhaust cams were also swapped and tested, no problems with these.</p><p>MAF checked out OK</p><p>ECU was reprogrammed as part of the elimination process. It is down to trial and error because the fault codes come on sometimes only but the problem is there regardless.</p><p>The problem is the fault code comes on sometimes and not always, but it will be misfiring in cylinder 1 or 2 if it comes on, but the engine bogging down on full throttle is always there.</p><p>Now checking to see if exhaust cat converter is clogged?? Otherwise might have to get another ECU to try, but these 525 ECUs are not so easy to come by, apparently.</p><p>Don't know how much it is gonna cost yet, keeping my finger crossed on that one.</p><p></p><p>Sigh....</p></blockquote><p></p>
[QUOTE="willy5, post: 545010, member: 2319"] Thanks All for the good advice. The fuel filter was changed also, no improvements Sensors for inlet and exhaust cams were also swapped and tested, no problems with these. MAF checked out OK ECU was reprogrammed as part of the elimination process. It is down to trial and error because the fault codes come on sometimes only but the problem is there regardless. The problem is the fault code comes on sometimes and not always, but it will be misfiring in cylinder 1 or 2 if it comes on, but the engine bogging down on full throttle is always there. Now checking to see if exhaust cat converter is clogged?? Otherwise might have to get another ECU to try, but these 525 ECUs are not so easy to come by, apparently. Don't know how much it is gonna cost yet, keeping my finger crossed on that one. Sigh.... [/QUOTE]
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Power Loss at low rpm
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