bmw d tech help please

[911gary]

Hi I have a 2009 335d MSport E92 as my daily car,we have had a remap up to approx 370bhp with no other mods I had this same map on a similar car last year and the car exhibited the same issue,after driving on fast roads in Europe at high speed for prolonged periods both cars went flat throttle response fell away to about 25% almost like in limp mode,this seems worse after using paddle shift or lots of kickdown and prolonged hard acceleration,no dash warning lights,we scanned car and found all six glow plugs showing as faulty but car starts from cold and runs perfectly if you stop car and leave for 15mins all is fine any help would be appreciated...could it be the map or gearbox temp? Thank you.G

[Dan_M5]

Its just temp of things. you can buy coolers

[911gary]

Hi dan thanks,what do you think gearbox or intercooler?