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In the Garage
MG TF
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33,663 Posts
It does sound electrical, is the battery/alternator voltage around 14V when the engine is running?

A failure of the camshaft sensor is a known issue on MPI engines however it doesn’t usually result in poor running.

If your OBD scanner can do live data what is the output from the pre-cat lambda sensor?

Do you know when the coil packs and leads where last changed?

When was the cambelt last changed, I guess that there is a chance that it may have slipped by a tooth and the crank and cam shafts are out of sync.
 

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In the Garage
MG TF
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33,663 Posts
Presumably you have done a throttle position sensor re-set?

 
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