Look for air in the fuel lines when running. Verify that all of the clear lines are in the proper locations - it's possible to reverse some of them and the car will run but poorly.

Finally, pull the pre-filter and verify that the larger O-ring is present. New ones do not come with an o-ring.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250