Tb-42e lumpy under accleration

[taslucas]

Ok guys the bloke is asking about an efi engine.. so no ballast resistor no carby no points.....

No one has mentioned any of those things?

Please read before posting dribble about what your mate may have told you....

I would check fuel pressure, compression as a bare minimum to start with before anything.

Ok, at least the last part of that was constructive, but it is missing on both lpg AND petrol. So as you said above: Please read before posting.....

Clearly someone saying it could be the tps is a stab in the dark and an uneducated one at that. Check your service manual for the correct resistance readings if your unsure. But KISS (keep it simple stupid) 1st.

It was the OP that mentioned the TPS and the only response to that was mine saying that it would not be the problem

Seems a lack of mechanical knowlage on this forum in regaurds to anything not diesel. That's my rant over.

Diesles are a straight forward engine. Petrols and more importantly dual fuels are more complicated. There are quite a lot of simple things that can be the cause of a slight miss and it is hard to diagnose straight away over the internet without asking a lot of questions.
I have had the same (or similar, its hard to tell without seeing the vehicle) problem twice with my dual fuel TB42 (carby). The first time it was leads, the second time it was a vacuum leak affecting the vacuum advance.