The 'upside down fuel gauge' was interesting, I have read about the problem on this forum before, clearly a change somewhere between 2002 and 2004, glad I spotted it and restored the previous tank unit !

andyfreelandy said:

The 'upside down fuel gauge' was interesting, I have read about the problem on this forum before, clearly a change somewhere between 2002 and 2004, glad I spotted it and restored the previous tank unit !

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Yes the resistor is up the other way on the later units. It's easy to swap the parts over to correct the issue.

rob_bell said:

Glad its sorted Andy - I had to replace both coil packs on mine for intermittent misfires within 6 months of each other. It's run as sweet as a nut ever since. The spark will break down under heavy load, so hence the misfire on acceleration. On mine, it was worse on acceleration from low speed in a high gear.

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The location of the coils doesn't help the longevity of them. They are being baked on top of the engine, with a cover over them, so they run very hot. This has a detrimental effect on the secondary windings, as the windings are so fine. Pencil coils also suffer similar issues, due to the same high temperature operating environment.