Just fitted a Prins VSI lpg conversion to a 2003 5.4l \f150 HD to make it a bit more economical - the price of petrol here is currently around $8 per imperial gallon!
The problem is the Service Engine Soon light keeps coming on; we've pulled the code and its coming from the fuel tank sender unit; we suspect its not registering any movement on petrol usage so its throwing a code at us. We can clear the code but within a couple of days its back, we have to check it every time to make sure its not something else so its starting to get irritating now.
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