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It would be interesting to find out what percentage of re-maps have been the cause of major problems on a MH and what percentage have been re-mapped with no ill affects at all.
At the moment I have found our MH to be running much better, smoother and quieter with no excess smoke even on kickdown.
My partner who has not been involved with the re-mapping process drove the MH for the first time this week and she could not believe how much smoother the engine felt, she also thought it was quieter and was a much more relaxed drive, but yes I will be watching my mirrors and listening to any strange noises but truth be told i'd be doing that anyway.
Have to agree about smoke, In the end the Disco had to be wound back a tad to make it politically acceptable.
New vehicle manufacturers have to comply with ever more stringent emission requirements for new vehicles. But the MOT test levels are set to allow well maintained old bangers to pass. It is this wide margin that the re-mapping eats into to achieve the increased performance. Listen to all the waffle if you like but to get more acceleration while your turbo speeds up you just have to put more fuel in. More fuel with the same amount of air = more smoke.
I have remapped every diesel car that I have owned, ( 6 ).
IF the map is done correctly by a recognised company then it will always result in better performance. Economy can be improved but only if you drive in the same way as before the remap.
There should be no smoke from the engine under normal driving . However if you have used a light throttle or only driven around town then it is quite likely that you will see smoke should you then use a fuller throttle opening, say when joining a motorway.
This is true whether the vehicle has been mapped or not.
Boost pressure would not normally be changed, although less scrupulous companies may do this as a cheap option. This is often the way the add on box works , I believe.
A good remap will alter fuel metering etc , similar to putting the vehicle on a rolling road and adjusting the ECU on an individual basis.
I think there is someone on this forum who does remapping and maybe he can offer some more detailed advice.
IMO a remap is an excellent option IF done properly.
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