That could happen if you aren't getting air to the intake manifold but it would not drive well at all.

 

I checked again this morning. RPMs and boost are not, let me repeat, not climbing under WOT. If I'm cruising at let's say 55 at 2500RPM, I'll floor it, watch RPM and boost stay almost still for about two seconds then it kicks in. From what I know, if the clutch was going bad the RPMs would climb with no acceleration.

 

Swap your fuel pump relay.

Is there any jerkiness during the hesitation or everything seems ok and the RPMs just aren't climbing? Any strange noises from the engine? What gear are you in when you go WOT at 2500?

 

Yeah, that makes good sense. The OP said he could not hear the engine during the hesitation so I don't think the clutch is slipping. It would not be the first time the symptoms did not sound like a slipping clutch when it was in fact slipping, but in this case it makes sense it would be the fuel pump relay.

I've had this off and on for some time now, hesitation on wot, particularly at lower rpm, like less than 4k. As the op said, lite and mid throttle are fine, it's only when you stab it that you notice the hesitation.

I was thinking it was in the throttle maps or limit maps, but I have adjusted those many times with no change. Never thought about the relay being slow to engage. I'll go ahead and swap my relay when I get back in town and see if that clears up my symptoms, in the mean time I think the op should give it a shot as the revised part number relay is not very expensive and you could even swap it with the horn relay for a quick test.

Good call

 

I'll swap them tonight and post any results tomorrow after a little driving.

 

In for info and to try the different relay as suggested. I too have the same issue. It is not the clutch slipping. I too thought it would be in the throttle maps.

 

ahhh relay will make it go lean. Sounds me like boost leak somewhere. Say boost does move for 2 sec? Thats a lot. Check your fuel line going to your intake there is a recall on that to.

 

Left side of your fuel rail and goes to your intake.

 

Recall just came out this month on the fuel line. But never know.