A fuel filter won't hurt, but you said it misses when it's not under a load. I would think a miss under a load would be more to identify a lack of fuel.
Have you checked for vacuum leaks? Check the EGR valve to make sure it's not stuck. That would cause a leak and a miss.
Let me know. Also, if you want to check fuel pressure, let me know and I'll provide the directions for you.
Saturday, February 21st, 2009 AT 8:49 PM