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

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
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
Viewing 1 - 4 of 4 comments
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.
Loss of power an fuel milage cleaned the egr valve still have problem
my car looses power on hot days and stalls. Only happens during the summer hot months.
Majorly reduced engine power and reduced gas mileage...Needed to be soaked for almost two days to "ungunk" it.