Hi guys. Recently purchased a 1998 a4 1.9tdi avant. Since owning it ive serviced it changing the engine oil and filter, fuel filter, air filter, glow plugs, coolant, water pump and can and aux belts. The car has run fine since but within the last week I've noticed the engine is intermittently hesitant. If I accelerate gently I can hear it come on boost and then all of a sudden it stops. Almost like I've lifted my foot off the accelerator. If I back off the throttle then reapply it goes on to drive as it should. I'm not very good at explaining this issue so hope some of you may understand what I'm getting at and hopefully have some ideas as to where to start llooking thanks in advance
Dave
Dave