Over the last few weeks or so the revs have been reluctant to drop and some times sticking around 2000rpm. This happens on gas and petrol. Then it started to put on engine management warning lights, the most common one a curly one like a diesel glow plug light. This would hold the revs at 2000rpm even if you put your foot down, and would clear if you turned the car off and on.
Spoke to my mechanic (Renault trained) and he thought it could be a sticking throttle, can be common on this car apparently, but he also noticed an air leak noise? Which seamed to come from the place where the converter had drilled a hole in the throttle housing, but it was very slight and we couldn’t quite find it so were unsure.
Few days late I had a large sucking noise, the car would hardly run and another light came on (orange looks like an engine) which the garage had to turn off.
It turns out the gas fitter had drilled a hole in the wrong place and plugged it with silicon



Not very happy so took it back, and the guy is paying to have the housing replaced,
I hope this will solve all the problems, I have resealed the hole temporarily but its still not right, my mechanic thinks its all down to the conversion, as I have owned the car from new with out any problems, so it would be a coincidence if it had a problem now


After that long rant, what I would like to know. Could you advice me of an independent agent in the South Wales are, where I could get this conversion checked.
As my confidence in it is understandably undermined.
I have not named the installer for legal reasons, and he’s a nice bloke