Oil and carbon tend to build up, creating restrictions in the intake manifold. Symptoms will be loss of power (sometimes severe) and poor fuel economy.Google+
Car Problem Reports
Volkswagen Golf TDI Loss of Power Due to Oil and Carbon Build Up in Intake Manifold
Volkswagen Golf TDI Problem
Engine Affected: 1.9L 4 Cylinder Diesel Turbo
Average Mileage: 149,629 mi (98,000 mi - 175,516 mi)
Visitor, 2000 Volkswagen Golf TDI, 1.9L 4 Cylinder Diesel Turbo, 175,516 mi
Majorly reduced engine power and reduced gas mileage...Needed to be soaked for almost two days to "ungunk" it.
Visitor, 2004 Volkswagen Golf TDI, 1.9L 4 Cylinder Diesel Turbo, 98,000 mi
my car looses power on hot days and stalls. Only happens during the summer hot months.
I took the intake hose off the other day because I was inside the engine fixing power steering issue and noticed this problem. I too have it.