Loss of Power Due to Oil and Carbon Build Up in Intake Manifold on Volkswagen Golf TDI

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.

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Average mileage: 152,187 (98,000–175,516)
Engine affected: 1.9L 4 Cylinder Diesel Turbo
12 model years affected: 1996, 1997, 1998, 1999, more2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
18 people reported this problem
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problem details
2001 Volkswagen Golf TDI - 1.9L 4 Cylinder Diesel Turbo 160,000 mi,
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.
2005 Volkswagen Golf TDI - 1.9L 4 Cylinder Diesel Turbo 162,423 mi,
Loss of power an fuel milage cleaned the egr valve still have problem
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.
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.