I have an 01 1.8T and I am suspecting it has a fuel pump problem. I am getting a hesitation right after start up or if I get on it hard after driving for a bit, like getting on the highway fast. I dont think it is a plug as it is not constant, it may be an injector? I also dont think it is the turbo as it will do it at low rpms. I changed the fuel filter 2 months ago and it was fine for month, so I dont think it is that. What are the running and ignition on fuel pressure numbers supposed to be please? TIA

K2

 

vacuum hose connected running at idle 3.5 bar disconnected 4.0 bar and residual after 10 minutes at least 2.5 bar.

 

I had the same issue and it turned out to be the MAF sensor. Do you have a CEL displaying?

 

Thanks jiggleo.

Yes, I have not checked it since this problem though. I have needed an O2 sensor for a bit. I will take it in to get it checked. Thanks Whiskaz.