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Hi guys, I'm new here and really appreciate your time. I have a VW Golf 1.9 TDI which has a power loss issue. After driving for approximately 20/30 minutes my car will start to lose power, especially when in and around roundabouts, driving at over 2500rpm or driving uphill. In the last week I have replaced the air filter, air flow meter and done an oil change. I had a brand new battery approximately 2 months ago (which is roughly when my problems started). One of my mates hooked up his laptop and found a fault with the MAF which I have since replaced but have not yet had the errors removed - I'm going to see him again tomorrow. It also had an error relating to Cylinder 1 but he was sure this was due to the MAF not putting enough air in. This morning, for example, I drove 16 miles before any of the symptoms started but once they kicked in the remaining 40 odd miles were a nightmare! The only thing I haven't done yet, which I can do myself, is replace the fuel filter and check the plugs. Any help would be greatly appreciated. Thank you for your time, Michael