loosing boost

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Oct 28, 2005 | 07:08 AM

50jd60

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Senior User

Joined: Jul 2003

Posts: 156

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loosing boost

05 6.0, New EBS and new EGR , was doing the pow-pow on a slight pull, unplugged EGR and no more Pow-Pow, now just running along normal speed and stepping on throttle truck is dead, look at boost pressure and its reading 0, step down farther on throttle and it down shifts and boost comes back, might be alright for the rest of the day then again it might do this a few more times during the same trip, also have noticed this does it namely when engine temp. is almost to the normal setting, shut engine off and let it cool down for about an hour and it will do it again. Any ideas on what is going on.

Oct 28, 2005 | 10:23 AM

Mustang42

Senior User

Joined: Apr 2003

Posts: 136

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From: Reno, NV

I would say to plug the EGR back in.

Oct 28, 2005 | 10:49 AM

LOOnatic

More Turbo

Joined: Feb 2004

Posts: 722

Likes: 22

From: New Orleans to San Diego

When my EGR is unplugged i lose maybe 1-3 psi on max boost.
Your condition sounds diferent and more serious.

Oct 28, 2005 | 04:07 PM

2far2Glamis

Freshman User

Joined: Aug 2005

Posts: 43

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I had the same problem towing up a hill. Pressure dropped to 0, loss of power for about 5 seconds, then came back. Dealer tried to tell me that when turbo pressure equals exhaust pressure, this happens. I'm not so sure.

Oct 28, 2005 | 06:04 PM

Mustang42

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Joined: Apr 2003

Posts: 136

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From: Reno, NV

Are you getting a CEL? I am wondering if the computer is going to "limp" mode with your EGR unplugged.

Oct 28, 2005 | 08:49 PM

50jd60

Thread Starter

Senior User

Joined: Jul 2003

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No CEL, unplugged EGR because of the pow-pow going up hills on a slight pull, when shutting truck down, turbo from outside sounds normal and this seems to happen only when the engine is about to full normal operating temp. Like I said it doesn't seem to happen when engine is at normal temp.

Oct 29, 2005 | 12:08 AM

Antonz

New User

Joined: Oct 2005

Posts: 3

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The vanes in your turbo may be sticking, have the dealer do a VGT test to see if the vanes in your turbo are moving freely.

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Oct 31, 2005 | 10:24 AM

kennedyford

Fleet Mechanic

Joined: May 2005

Posts: 1,567

Likes: 3

From: Chattanooga

electronic turbo actuator

The turbos on these trucks have a electronic switch since they are multi speed. We have been having numerous problems with this and ford has recently done another recall and reprogram. Now Im looking for a mod to bypass this and leave the sensor in the on position all the time. Also on our truck the backpressure butterfly for warmup would come on all the time as if the truck was cold..of course it was hot from pulling a trailer and this didnt make any sense. Could there possibly be a carbon buildup on the back side of this sensor? Ford has many many many in stock and we are wondering if for knows. And since we live in Arizona we have the worst lemon law and are unable to get a buy back for the other problems..hope someones mind starts ticking and helps the rest of us out for some home mods.