I guess there is nothing really wrong with it, but it is to do with the people who have fiddled with it before, and well before that. The kit and wiring is now 20 years old too meaning most of them will not exactly be trouble free.

After having 'poor' LPG ECUs setups run perfectly (I used to mess around with them years ago) and having seen a number of 'top end' LPG ECUs installed horrifically I'd have to agree with the above. In some cases I would have been better off starting off all over again for the hassle I kept on going through (botched looms, tired injectors and other parts etc.). I have seen similar things on car ECUs as well far too many a time.