It's cold and it goes into a retard mode

aaron.luckert · Oct 8, 2014

I really don't understand why this happens. Last winter I was having problems with my 08 Ford F350 when it got cold, temps between 10 to -5 degrees. Lest say I'm going 60 My pyro and boost would sky rocket. But I wouldn't be going any faster. I would still be going 60. Also my back pressure would stay at 30 35. I've been told to change my BP sensor and I did but it still does it when it's cold outside. I was also told that it might be something wrong with my low pressure turbo.

Any info can help. Thanks.

Powerstroke Man 6.4 · Oct 8, 2014

aaron.luckert said:
I really don't understand why this happens. Last winter I was having problems with my 08 Ford F350 when it got cold, temps between 10 to -5 degrees. Lest say I'm going 60 My pyro and boost would sky rocket. But I wouldn't be going any faster. I would still be going 60. Also my back pressure would stay at 30 35. I've been told to change my BP sensor and I did but it still does it when it's cold outside. I was also told that it might be something wrong with my low pressure turbo.

Any info can help. Thanks.

IIRC hearing that at cold temps the EBPS tube will freeze and that will cause everything to go outta wack. It will also cause high boost ,no power etc

Dzchey21 · Oct 8, 2014

If you replaced the tube then your ok, if not you need to clean that out.

It could be the actuator on the Turbo, you need to monitor VGT duty cycle while it happens. Cruising you should be around 50% just maintaining speed

aaron.luckert · Oct 8, 2014

Yea I replaced the tube and the sensor and it still did the same thing.

Stroked777 · Oct 9, 2014

Where is your sensor hooked in? Factory locations before the coolers?

aaron.luckert · Oct 9, 2014

Yea. Same place as the factory

Stroked777 · Oct 9, 2014

Move your egr block off plate up to the joint behind the turbo and tap the plate and hook the sensor there. My truck did the same thing. When I removed that egr pipe you wouldn't believe how much water came out of there. Then I just moved my egr block off up top, I would like to see it freeze up again when it's 6 inches away from a hot turbo

Dzchey21 · Oct 9, 2014

aaron.luckert said:
Yea I replaced the tube and the sensor and it still did the same thing.

need to check VGT duty cycle next when it happening

aaron.luckert · Oct 9, 2014

Ok. Did you have to drain the coolant when you did that ?

Humphrey99 · Jan 10, 2015

I think I may be having the same problem. Temps got down around zero here and boost was doing funny things. Going down the road it would drop to almost 0. If I leaned on the throttle it would lag and then shoot up way higher than normal until I backed off again and then rapid drop to almost nothing. The day it warmed up closer to 20 it seemed to run normal. Today, the temp dropped and it acted up again.

Humphrey99 · Jan 10, 2015

It was warmer today so I drove it around. Seems to run fine when it's warm enough.

What are the options to fix this? I see one person moved the blocker plate up by the turbo and relocated the sensor to it. Is that the only fix? Any help on this is appreciated.

Also, just curious, how common of a problem is this for people?

ckrueg · Jan 11, 2015

I had this happen after the truck sat all day around 0 degrees. The next day it fixed itself

sootie · Jan 13, 2015

Humphrey99 said:
It was warmer today so I drove it around. Seems to run fine when it's warm enough.

What are the options to fix this? I see one person moved the blocker plate up by the turbo and relocated the sensor to it. Is that the only fix? Any help on this is appreciated.

Also, just curious, how common of a problem is this for people?

ya-move the block off plate the the one behind the turbos. your problem is the ebp sensor freezing or moisture in the tube freezing, causing an inaccurate reading.