EB not making peak boost?

Bullitt · Feb 23, 2015

So the past few days I've noticed that my car doesn't seem to be reaching as high of a psi level as it has in the past. My car would hit 18 psi on the digital gauge, now the highest I can get it to go is 15 or so on a full throttle 2nd gear pull, but most of the time the car keeps the boost under 10 psi. It's more exaggerated on the highway where the boost will not go past ~ 8 psi even when it's full throttle in 6th. Normally the boost would be way higher than that. It has been very cold the past couple of weeks, but I didn't think the ECU would cut back boost if the engine is fully warmed up. I checked under the hood for loose connections but didn't see any. The car drives fine otherwise and doesn't make any weird noises. Does what I'm experiencing sound strange to anyone else?

greg hazlett · Feb 23, 2015

Car throwing any codes or acting any different? Bad tank of gas? Add any parts/mods to it?

Is the car spinning which causes TC to come on and will cut timing power?

Bullitt · Feb 23, 2015

greg hazlett said:
Car throwing any codes or acting any different? Bad tank of gas? Add any parts/mods to it?

Is the car spinning which causes TC to come on and will cut timing power?

No codes, no TC light, car acts fine. I thought it might be a bad tank of gas too, but I just filled up with a new tank of gas today, 93 octane like always, and still doing it. :shrug:

greg hazlett · Feb 23, 2015

Huh...and I am sure being in the Steel City it has been using the winter blend for a while.

Did you install any parts?

Bullitt · Feb 23, 2015

greg hazlett said:
Huh...and I am sure being in the Steel City it has been using the winter blend for a while.

Did you install any parts?

No parts, car is bone stock. I've had boost hoses blow off and boost leaks from up-pipes and stuff like that in the past on other cars, it's definitely nothing like that. I almost think it's software related or something. If I wasn't going full throttle or looking at the boost gauge I probably wouldn't even notice anything was different, the drop in power is very slight.

greg hazlett · Feb 23, 2015

That sucks....time for a trip to the dealer?

Bullitt · Feb 23, 2015

greg hazlett said:
That sucks....time for a trip to the dealer?

Yeah, was gonna see if anybody here had any ideas, otherwise I guess I'll have to.

greg hazlett · Feb 23, 2015

No chance of running 87 by mistake?

paullyd210 · Feb 23, 2015

Have you tried looking at the hose from the intercooler to the turbo?
I was having the same problem and eventually no boost at all when the hose detached completely. When first experiencing the problem i also checked under the hood and everything looked good but didn't bother to look at the intercooler since it's pretty deep down. It's interesting that when this hose becomes loose or even comes off completely the computer will not throw out a code or at least didnt for me.

Here is the previous no boost thread
http://www.mustang6g.com/forums/showthread.php?t=15898

Bullitt · Feb 23, 2015

greg hazlett said:
No chance of running 87 by mistake?

No. Think a friend helped me figure it out. The colder air is denser. He said the EB has an intake air compensation table in it from the factory. Ford does it so you can make similar horsepower with less boost due to the cold air and don't over boost. Makes sense. The slight loss in power must have just been all in my head I guess from seeing the lower psi number on the gauge.

Bullitt · Feb 23, 2015

paullyd210 said:
Have you tried looking at the hose from the intercooler to the turbo?
I was having the same problem and eventually no boost at all when the hose detached completely. When first experiencing the problem i also checked under the hood and everything looked good but didn't bother to look at the intercooler since it's pretty deep down. It's interesting that when this hose becomes loose or even comes off completely the computer will not throw out a code or at least didnt for me.

Here is the previous no boost thread
http://www.mustang6g.com/forums/showthread.php?t=15898

I'll keep an eye on it and see if it gets worse. Otherwise I think it's what I just posted above /\

greg hazlett · Feb 23, 2015

Glad you got it figured out!

GO PENS!

GO BUCCS!

Bullitt · Feb 23, 2015

greg hazlett said:
Glad you got it figured out!

GO PENS!

GO BUCCS!

Thanks! Can't wait for baseball to start up!

EB not making peak boost?

Bullitt

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greg hazlett

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