Don't pay the destination fee either. More Horse SH!T.

You have a vacuum leak. One of the lines isn't seated to the controls.

Run some seafoam through the fuel system and pull a vacuum line off and let it suck some seafoam dierctly into the intake, it will cause black junk to fly out of the tail pipe (don't be alarmed) keep doing it 'till there is no more black junk coming out. Also have the fuel preasure checked if it is ...

The D5 163hp. Engine has more horse due to more compression slightly more aggressive cams. If I remember right the head is the big difference as far as compression not a piston swap. But don

Thank you for your replies, but I have checked for vacuum leaks and there are none to be found. I gave up and have taken the car to a dealer and they are scratching their heads as much as me. I did have a bad throttle body and that was causing some emissions problems but it is not the cause of the m...