2010 MKS no turbo power/negative boost

S

salsathe4th

New member
Lately I've been having problems with my car not getting its full potential when WOT. When I WOT i can hear the whirring of my engine increase then quickly drop and not fully contain the boost pressure. (The turbos continue to spool up but the power from them gets released) I ran the torque app and found out that at low speed i have -12 psi and at WOT it would go to 7 then quickly go to 0 or even negative. I feel like that shouldn't happen when i am accelerating. The only time I can get more then 0 is when the car quickly downshifts but yet that doesn't last as long as it should (to the end of the gear). From a dead stop to pressing on the gas pedal the boost psi rarely goes positive. If anyone could help me with this issue that'd be great :)
 
It sounds like your wastegate hose popped off by the actuator or the intake charge pipe.  Z
 
CAC hose could be loose as well.

Mine popped off after a d-ship trip and i had an NA SHO for a bit....didn't like it much.
 
Hey sal I'm pretty close to you in Parma. I could take a look and sho you where those connections are if you would like.
 
glock-coma said:
Hey sal I'm pretty close to you in Parma. I could take a look and sho you where those connections are if you would like.
Click to expand...

If i can't figure out the problem in the next couple of days I'll stop over for some help. Thank you!
 
salsathe4th said:
glock-coma said:
Hey sal I'm pretty close to you in Parma. I could take a look and sho you where those connections are if you would like.
Click to expand...

If i can't figure out the problem in the next couple of days I'll stop over for some help. Thank you!
Click to expand...
No prob. Sent you an IM with my contact info. Or you can send me a message here.
 
Nice video.  I'm going to go put a clamp on that MOFO right now!  With two other boosted cars I've learned EVERY vacuum or boost line needs retention.
 
i checked all the connections pictured and they were all on and secure. Could this be a turbo itself related issue? Also i just wanted to say that if im barely touching the gas pedal while moving (LIKE BARELY!) The car will go forward fine. BUT once i let off the car gets a slight drop back kick and then starts to decrease speed faster then it should.
 
Leak could be on the "hot pipes" in between the turbos and intercooler.
They have been known to tear right at the bellowed area. The ecoboost motor has a crazy amount of front/back movement under load. 
 
I forgot to mention if you have any codes set?? Should be some codes,especially with your symptoms.  Z
 
There are no pending, past, or present codes that torque could read. Also it feels like the car is starting to be more responsive. Probably because the weather got warmer the last 2 days. When it gets colder it'll probably start acting weird again. I kinda think its the fuel that i got since i rarely get 87 octane and felt like filling up cheap for what i needed at the moment. Probably not a good decision. I just really hope it's not a turbo issue  O:-)
 
salsathe4th said:
Lately I've been having problems with my car not getting its full potential when WOT. When I WOT i can hear the whirring of my engine increase then quickly drop and not fully contain the boost pressure. (The turbos continue to spool up but the power from them gets released) I ran the torque app and found out that at low speed i have -12 psi and at WOT it would go to 7 then quickly go to 0 or even negative. I feel like that shouldn't happen when i am accelerating. The only time I can get more then 0 is when the car quickly downshifts but yet that doesn't last as long as it should (to the end of the gear). From a dead stop to pressing on the gas pedal the boost psi rarely goes positive. If anyone could help me with this issue that'd be great :)
Click to expand...

These ECU's are torque based so they will vary the boost to hit driver requested torque up to the ECU (Ford or your tuner) imposed torque limits. Your max and part throttle boost will change due to a variety of factors such as cold weather when the air is denser. The ecu will not have to command as much boost to get to the requested torque. From what I understand it commands less torque as the revs climb as well. You can see it on a dyno graph, the Torque peaks quickly then tends to drop moving up in revs. This may be what you are experiencing. When cruising you should see negative boost (vacuum). Does the power seem linear or is it jerky?

What are you using to monitor boost?
 
jerky and sometimes when i take off the car will get like a hop/shake or two which makes my foot move which then moves the gas pedal back and forth and makes the skipping very obvious.
 
salsathe4th said:
jerky and sometimes when i take off the car will get like a hop/shake or two which makes my foot move which then moves the gas pedal back and forth and makes the skipping very obvious.
Click to expand...
This almost sounds like wheel hop.

Sent from my ME173X using Tapatalk

 
You must log in or register to reply here.

Similar threads

C
my 2017 SHO w/PP
2 3 4
Replies
65
Views
28K
SHOdded
S
U
2014 Explorer Sport: No accelerating/boost after a long drive - wastegate issue?
Replies
1
Views
7K
UrbanExplorationz
U
1
Pcv issue or turbo seals?
Replies
0
Views
4K
13shonuff
1
I
15' Lincoln MKS - Quick Daily
Replies
2
Views
7K
Broodingrage
B
L
Did the 2013+ brake upgrade... Issues...
Replies
1
Views
3K
351Blueblood
3
Back
Top