Bad fuel pump driver module or?????

[PHS79]

We have been having problems with my wifes 05 Focus ZX4 and I can't seem to figure it out. Here is what is going on.

A couple weeks ago Steph said that her car was starting kinda hard. So I went out to start it as soon as she got home and it started just fine and normal. The next morning I went out and started the car for her before work and the fuel pump made a loud growling sound, almost reminded me like a bearing going out or something, it took about 10 seconds of cranking but the car started. After it ran for a couple minutes I shut it off and restarted it, the pump sounded normal and the car started fine. Over the next week or so I have realized that if the car only sits for 1-2 hrs or less, the pump and starting it totally normal. But if it sits more than 2 hrs the pump growls and you have to crank on it for 10-15 secs before it will start. Once the car is running it runs like a top!.

So I was thinking that the fuel pump was going out. Last weekend a buddy and I dropped the tank and replaced the fuel pump and strainers. And now I still have the same exact problem as before!!

I usually like to do most of my own wrenching, but this one has me and my friends kinda stumped.

Would you have any idea what could be causing this? A friend said possibly the fuel pump driver module, is that maybe it?

He also thought that the car would have to be be reprogrammed if a new FPDM is install, is this true or is it just plug and play?

Any help would GREAT!

[itsmevin]

i hope this gets answered. my gals is doing the exact same for six months

[PHS79]

Come on, no one has any input???

[GapBoyPCS]

You'll probably get more input in Team Tech. I will move your thread there for more responses.

[PHS79]

Thank you for moving this. Since I am new hear I didn't know what area was best to post.

[TXFO]

driver module is plug and play. drivers are not common but not unheard of either.