Re: Tuning Boxes
Hi hardy. If you saw one cheap on ebay it was probably mine! I had one fitted to my 2.4 156 150 for about 6 months before I sold the car - just sold the tuning box on ebay for £63, although buyer has yet to send the money through. It may be back on ebay soon!
It worked on the 156 Ok. I don't think it gave anything like the claimed 30BHP extra, but it certainly did make a difference. It didn't seem to do any harm to the car. The tuning boxes are very simplistic. I think they just trick the diesel pump into puting more diesel in. It works OK - you do get a tiny bit more diesel smoke if you welly it, but not much. They claim to give better fuel economy, which I would question, mine went down by approx 2mpg. I can't see how they could improve efficiency by enriching the mixture.
I now have a 159 2.4 200BHP and I'm going to pay the extra and get it remapped. The dealers won't need to know, so not too bothered about that. I think it's worth doing the job properly on a car of this value.
I'm waiting to hear from someone whos has a remap on a 200BHP - I would like to know what effect it has on the dismal economy.