My TB42 runs only on petrol. Suddenly, the engine started to cut off and now it's running rough and backfiring. I have already attempted the following repairs for the issue, but there has been no improvement:
- Changed the coil
- Replaced the distributor cap and leads
- Installed new spark plugs
- Replaced the oil filter
- Had the injectors professionally serviced and tested

Any suggestions would be greatly appreciated.lp