NASSTY

I was talking about what happens if you have your foot into it, hitting full boost.

weiser

For your information I have a turbo charged car as well (VW Passat 2.0T) and I used to drive a 2004 Dodge 2500 with a Cummins so I am well aware of how Turbo's "spool" and perform.

Cord

I have a air intake and you can hear a valve popping each time it shutters. I'm convinced the computer is trying to dump boost because the turbos want to light.

Joewee3.5

Full throttle is different. Mine "surges" a little, almost like the computer doesn't know whether to cut boost at 12 or 10 or 15. Feels like it's going from 100% throttle to 95% and back and forth til I let off. Is this what you're describing?

jcain

Cool, You owned other turbo vehicles. I know many who own things that they haven't a clue about. What's your point again?

Kenferg1

I may not have owned turbo vehicles before, but I know a problem when it is present. Since they flashed the tranny and re-calibrated the engine misfire program I have not had the problem. The transmission is now relearning. I have driven the same route using the same throttle at the same speed in the same gear and have not been able to reproduce the shudder that I have experienced since about 2K miles (now 4K miles; 150 miles since the trans flash).

This is a real problem that Ford needs to work out. If it isn't a real problem then they need to inform owners why it is normal and what causes it to be normal. While there are several thousand trained monkeys driving the EB, I am not one and neither are the others who have reported this issue. If this is common to engines with small turbos then tell me! I'm not a genius but I can understand if you tell me about it.

My guess is that this is a programming issue that has to do with the turbo boost, the transmission speed, and a spot where the two do not get along with the current algorithms.

NASSTY

Mine doesn't feel like a surge.I can feel it and I can see the boost drop on my boost gauge. At WOT the PCM is closing the throttle blade enough to drop the boost before the upshift. I'm sure dropping the boost before the upshift is their way of protecting the tranny so it makes it through the warranty period. I can't wait for a tune that doesn't drop boost at WOT.

Tatunka

From the reading I have done about this problem is that it has to do with the cam position and the cam phaser not being correctly calibrated at the factory. There is a similar problem with the mustangs and the 5.0. That's why it effects both engines, eco and 5.0. The cam phaser doesn't work how it should and causes misfires causing the turbos to "skip" and drop boost because the turbos think you have just let off the gas. I would guess that this also drops MPG's.

gimmie11s

Exactly............ total non issue


^^^^ exactly!

Puh chew shudder? The tech cant duplicate a problem because there is NO problem. Actually, the bypass valves are doing exactly what they're supposed to when you hear the "puh chew." Read the quote i posted above yours..........

Cord

It's good to have somebody else backing me up on this. I have an advantage because I had my intake ducting come apart so I know what sounds the valve is making when the shutter is felt. The problem is that people are so hell bent on blaming Ford for a defective product that I can't make myself heard over their shouting.