2001 jetta tdi

[delancey]

the car is sluggish when starting out and drops speed when going up hills . 4o mph or more.

[veedubmechanic]

Check intake and egr for carbon buildup (pull off intake pipe from egr valve)

[boschmann]

Another possibility would be the Mass Air Flow sensor on the air intake pipe near the air filter housing. Pull the electrical connector & see if it actually runs better (not perfect). Note, this will set a CEL code that will have to be cleared.

[Snownut]

The already mentioned ideas would be first on the list, and for more detailed info and help try this web site...

http://www.tdiclub.com/

Originally Posted by delancey

the car is sluggish when starting out and drops speed when going up hills . 4o mph or more.