stange issue or not

[U235a4]

I have a 2005 6.0l stock except a cat back (cat removed) and a old style K&N filter. I bought the truck at the beginning of the year. I have noticed that when I start it cold, drive for a bit and it warms up the post turbo egt's struggle to get over 400*and the most spool the best. Then I shut it off let it set for say 5 mins (dropping the kid of at daycare) and start back up within 3 minutes of driving my post turbo egts are around 500* and will go as high as 600* by the time I'm at work and the boost response is better. Now if I don't have to drop the kid off and drive straight to work I might see 500*. to me something is getting heat soak and then works better. my thoughts are EGR ( just cleaned it and it was only about 50% clogged) or the turbo needs cleaned. Any thoughts, BTW the last time it was flashed was in 2008 and I don't know the strat.

other specs
ford oil filter
Rotella T6 oil
air filter has been cleaned

doing in the next two weeks to see if this helps
fuel filters (ford)
water drain
pressure reg spring (blue)

[troid123]

You really should relocate you EGT probe to the driver side manifold to get your actual EGT reading...

[U235a4]

Originally Posted by troid123

You really should relocate you EGT probe to the driver side manifold to get your actual EGT reading...

This was done Prior to my ownership of the truck but the thought has crossed my mind.

[PGreenSVT]

Yep, having the EGT probe post turbo isn't giving you the EGT information you need. You need to see what the EGT's are coming out of the cylinders. Sounds to me as though your turbo bushings might be coked up.

[U235a4]

Originally Posted by PGreenSVT

Yep, having the EGT probe post turbo isn't giving you the EGT information you need. You need to see what the EGT's are coming out of the cylinders. Sounds to me as though your turbo bushings might be coked up.

are you saying the 9 vanes and unison ring needs cleaned or the shaft bushings?

[111aj]

Sorry about getting off topic but can anyone tell me why you would not want your egt probe on both manifold since there is not enough room up behind the turbo? I have mine on the drivers side manifold but I have thought about adding one on the passenger side. There is no way to tell if you have a dead cylinder or really hot on that side of your engine.

[troid123]

Originally Posted by 111aj

Sorry about getting off topic but can anyone tell me why you would not want your egt probe on both manifold since there is not enough room up behind the turbo? I have mine on the drivers side manifold but I have thought about adding one on the passenger side. There is no way to tell if you have a dead cylinder or really hot on that side of your engine.

Some people have done this, I dont know if there is a real benefit but it can be done..

[headviking]

Originally Posted by U235a4

I have a 2005 6.0l stock except a cat back (cat removed) and a old style K&N filter. I bought the truck at the beginning of the year. I have noticed that when I start it cold, drive for a bit and it warms up the post turbo egt's struggle to get over 400*and the most spool the best. Then I shut it off let it set for say 5 mins (dropping the kid of at daycare) and start back up within 3 minutes of driving my post turbo egts are around 500* and will go as high as 600* by the time I'm at work and the boost response is better. Now if I don't have to drop the kid off and drive straight to work I might see 500*. to me something is getting heat soak and then works better. my thoughts are EGR ( just cleaned it and it was only about 50% clogged) or the turbo needs cleaned. Any thoughts, BTW the last time it was flashed was in 2008 and I don't know the strat.

other specs
ford oil filter
Rotella T6 oil
air filter has been cleaned

doing in the next two weeks to see if this helps
fuel filters (ford)
water drain
pressure reg spring (blue)

I would get rid of the K&N filter as well. So a search on "turbo dusting". You'll see why you should only use the OEM air filter.

[twhouse]

if it is the K&N fipk, not the drop in replacement S&B makes a direct replacement for the K&N filter element. (did that to my truck, had K&N when I bought it)

[PGreenSVT]

Originally Posted by U235a4

are you saying the 9 vanes and unison ring needs cleaned or the shaft bushings?

I am saying the shaft bushings. Sticking vanes don't usually improve with heat.