If I run the car to operating temperature, turn it off, then let it sit for around 20 mins, then try to start it again-it won't start.
I've had flooding issues in the past on a previous engine, so I tried removing the egi fuse and cranking it for 15 secs or so, then putting it back in and cranking it normally, but that doesn't work.
Also, when I crank it, it seems like it wants to start and almost fires, but not enough to start it (sorry-hard to describe).

For those of you with more experience than me, does this sound like a flooding issue?

It just started happening around 4 days ago. This is a new rebuild with around 950 miles on it.

Could it possibly be a bad fuel pressure regulator?

 

is both of your Water temp sensors hooked up?
on the rad at the bottom and the one on the water pump?

 

The FPR and intake temp sensor (not the one inside the AFM) are also some things used when starting a hot engine.

 

I have both of mine disconnected and it doesn't do that....but i have an s4

 

Yes they are both hooked up.

 

Im thinking ill replace the fuel pump and maybe the fpr.

 

AIT?
I have noticed a couple occasions where that connector just seems to "NOT be on there"..like a solid connection.It just seems to be a picky thing.
As Satch mentioned it,I would just check for bad connection there.

 

AIT looks fine, but in my ongoing quest to make this car reliable, I'll pick up a new one from Atkins.

Tx for the info!