have an EB2 that in the last 2 weeks has developed a flat spot on take off ,its running LPG and petrol and has a flat spot on both fuels.changed the spark plugs ,leads are 6 months old .it seems a bit down on power as well.im thinking TPS sensor any other ideas ?

fixed .new coil old one had 4 large cracks but still after replacing didnt run right so had some nulon intake foam cleaner used that and it runs like new .