Company I work for has had its fleet of vehicles remapped throughout the country and recently did our branch.
Noticed on my 06 plate Merc that after remap they have reduced top speed to 50 mph when running empty but if carrying goods (well within weight) that I am lucky to hit 45mph and hills are like mountains and barely hitting 20/25mph with more gear shifting than ever before. Truck pulled like a dream before, handling hills like they werent there with very little throttle work to keep her at speed not alone less gear shifting. Thing is surely this sort of behaviour aint right, I know times are hard but this sort of practice can`t be any good to the truck and as for joining dual carrageway or motorway from an up hill slip verges on being unsafe.
from what you have said, it has not been remapped, it has had the speed limiter re-calibrated to 50 MPh
the ECU remap does absolutely nothing to the speed limiter, they are totally seperate systems, the person doing the ECU remap cannot usually gain access to the speed limiter settings
if you are only doing 50 flat out, then it is obvious that you would struggle more on the hills as you are starting off in the wrong area for the power
shuttlespanker:
from what you have said, it has not been remapped, it has had the speed limiter re-calibrated to 50 MPh
the ECU remap does absolutely nothing to the speed limiter, they are totally seperate systems, the person doing the ECU remap cannot usually gain access to the speed limiter settings
if you are only doing 50 flat out, then it is obvious that you would struggle more on the hills as you are starting off in the wrong area for the power
Run at the hills in a lower gear to put the revs into the power band at 50 mph.As usual they’ve probably reduced the running speed but left the rear axle ratio the same which in the real world means that they’re spending a pound to save a penny to keep the thing pulling when it’s climbing and don’t want an engine which is bogged down below the best part of it’s torque and power band.But having said that it is possible that they’ve re mapped the engine management which would affect the power and torque outputs all through the range in just the same way that some tight fisted guvnors used to de rate some of the old already gutless motors.
Could be remapped to get better economy rather then better performance in speed.
I know someone that does it, he does motorhomes mainly and can do cars and can change bits so that the fuel economy is better, or to get better power.
If anyone is around Newark(or abit further out, he does travel) then i can recommend someone to remap your vehicle if anyone needs it doing. Not too badly priced and hes a nice chap.
Mr B:
then they’ll ask why a 9 hour drive now takes best part of 10 hours and all the deliveries are late.
Yep getting that already, asked what jumped up [zb] of an office staff introduced this idea and was told it was TM and I made big mistake of asking if he ever driving trucks before. Was told he is an X class 1 driver and I asked what cornflakes packet he got it out of or did he give good feedback to the ebay seller he bought it from.
Waiting to see if word gets back to him of my comment, sure I`ll find out soon enough when I get my P45
my own truck is remapped. my speed is slow, well it is to me as everything else passes… i do about 52/54mph. iv got used to it but what i find now is a massive difference on the hills. we run at 44tons most times and hills let the M2 out of Belfast i can go up it at around 35mph dropping one gear and keeping it around 1300 revs (half way in the green band) diesel wise im not sure if there is a massive difference per- run but overall it gives a better average return.i get an average of around 7mpg, maybe dropping .2 (6.or so but no less. doing container work especially 30ft bulk, the drag behind you has the economics of a brick, too big a gap between unit and trailer. it takes a while to learn how to drive it again as your driving style has to change. less throttle, more logging (putting the load on the engine they call it), if i do drive more aggressively it smokes more between gear changes, makes the performance worse. the driving stress is lowered as your not fighting for gears and running as a 430 when you pass 580 scanias it puts a wee smirk on your face.anything that passes is either lighter or one hell of a truck .
What type of Merc is it 
or so but no less. doing container work especially 30ft bulk, the drag behind you has the economics of a brick, too big a gap between unit and trailer. it takes a while to learn how to drive it again as your driving style has to change. less throttle, more logging (putting the load on the engine they call it), if i do drive more aggressively it smokes more between gear changes, makes the performance worse. the driving stress is lowered as your not fighting for gears and running as a 430 when you pass 580 scanias it puts a wee smirk on your face.anything that passes is either lighter or one hell of a truck