i have a 99 dohc and recently had the fuel pump replace. getting the car back it seems like it has a fuel pick up problem. first starting it for the day it starts some what ok. but i shut it off and start it up in few mins or so later it has a hard time starting. i have to rev it up just to get it to idle. if i don't do that it stalls. it's been a month and hasn't it improve. the engine kind of rough when starting it off. i only really drive it on the highway for 4 hour straight to get home couple times a month. any ideas?

 

try running injector cleaner

 

i ran the cleaner and still doesn't help.

 

how are the plugs?

 

I doubt its the fuel pump. If you have more then 1/4 a tank, its almost impossible for the pump to run dry. The pump sits in gas. Like 12 volt said, check the spark plugs. Sounds more like a tune up problem.