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Showing content with the highest reputation on 05/28/2012 in all areas

  1. 1 point
    The set-up is described in the Bentley manual - if you haven't got it, I'll scan the relevant page and send it (assuming I can work out how to attach it to the reply !!). I had precisely the same problem and symptoms of jerky off-throttle slow running. This is what I did; 1. Replaced throttle damper and set it up as per Bentley. This made some difference. 2. Cleaned out ISV and made sure there were no air leaks on induction side. 3. Did a basic settings to ensure that the throttle position sensor was coordinated with the ECU. This helped too, but not completely. 4. Got a good second-hand MAF; (they are not necessarily goood just because the engine doesn't stall if you disconnect it at idle.) Make sure the connector and the platinum wire are clean, and check the wiring for continuity back to the ECU. This was a further improvement, but still had occasional stalling when de-clutching from over run conditions (like throttle closed going downhill). 5. Disconnect 42 pin connector on the side of the cylinder head (with the ignition OFF !!), clean pins and socket with contact cleaner and re-seat the connector. This significantly improved idle and general running. The electrics for all the injectors and for the ISV go through here so any bad connections are bad news. 6. Had all injectors ultrasonically cleaned and filters replaced. FINALLY !! Perfect idle, no stalling, greatly improved starting and fuel economy. For good measure also put in a new set of standard issue NGK spark plugs. The difference is like night and day - it will trickle through traffic in 4th gear with no snatching and surging and, best of all, no stalling at junctions. Try these. In the meantime, I'll try to remember to send you the damper set-up procedure RB
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