BHPian locusjag<\/strong> recently shared this with other enthusiasts.<\/p>\n Last month, my Jan 2018 manufactured TUV300 T8 has had issues recently with the ‘Check engine light’ coming on due to a clogged intercooler and it had to be flushed. The turbo’s hose had to be changed and the EGR valve had to be replaced. Everything seemed to be back to normal. I hadn’t driven the car on the highway since then.<\/p>\n But on Saturday, on the highway, a couple of things happened:<\/p>\n #1 has been addressed and the hose’s crack is attributed to age-related rubber hardening.<\/p>\n #2 is weighing heavily on my mind now. Was it because the ECU detected a lower fuel inlet pressure (due to the fuel input leak) and overcompensated by pulling in lots more fuel – and this led to a rich fuel-air mixture? This can cause excess soot in the exhaust.<\/p>\n #2 can also be due to a dying turbocharger, worst case (yikes!). It could be due to a clogged engine air filter (unlikely, as it was checked recently). It could be due to fuel injector issues. I just pray that the intercooler flushing\/cleaning that was done last month had dislodged all the carbon from within and maybe the car was merely letting all that loose…<\/p>\n For now, I’ll be looking at adding Liquimoly diesel additive to the fuel tank sometime soon.<\/p>\n Check out BHPian comments for more insights and information.<\/p>\n\n