Anyone ever used Turner Diagnostics in Hemel Hempstead? https://www.turnermechatronics.com/contact-us/contact.html
I stumbled across them googling for HEVAC solutions, web site seemed to show some knowledge of the P38 and makes great claims about what they can fix, down to pcb level if needed. They sounded knowledgeable on the phone and as I have a big valved, flowed and ported fast road cam engine I thought i'd take her up and see what they could do with a re-map, they even sent an automated SMS booking reminder. I pulled up and they greeted me with the bodging builders sharp intake of breath between closed teeth "blimely that's running badly". As she'd just purred up the M4, M25 and A41 not what I was expecting. I asked in what way she was running badly and they said we'd know when they hooked her up but it could just be a bad set of plugs. I was immediately feeling uneasy about letting them loose on my car so I switched to discussing the LPG fine tune they offered, at this point the younger of the two walked off. I lifted the bonnet for the older one to look at the LPG ECU and his first words were "can't you smell the gas?" err no. He then asked the by now predictable "who did this install!", err I did. "You've not got equal length pipes between the injectors and nozzles" he said. My response was two fold, how on earth could he see that standing as he was by the bumper, with the pipes tucked away beneath the injector rails and behind the intake plenum and in any event how was he to know whether I'd cut the pipes to the length of the most distant gas injector and then led those from the closest through curving routes?
He then scoffed at a restrictor ball valve I have in the water supply to the LPG evaporator and finally literally shouted at the plumbing of the evaporator into the heater water circuits, "why have you used T junctions there". At this point my bull**it alarms were at full volume, I said he'd wasted my time and he the same to me, I ended up driving off with him shouting and gesticulating at the back of my car. This was all a 9 am booking so I have no idea if something else set their day of on the wrong footing.
So not what I was expecting and certainly not in my opinion to be recommended to anyone. I now notice despite the many pages on their web site they only have one testimonial. I'm interested if anyone else has had experience of them?