F150 Boost pressure feels limited

Do you have any codes or otherwise? When I toasted something in the SHO (never found out what) I was getting an underboost condition code, as it would only make 4PSI. I chased a lot other than physically checking turbos and never found anything.

Are you able to put the truck in M to make it hold gear? Would be interesting to see boost with it rev'd out and holding.

You mentioned exhaust, was that done before or after the issue presented? Could be an exhaust pressure issue if it was done afterwards.

Additionally, what tuner do you have (actual device)? The SCT X4 has a CAM reset option, and the TCM can be reset bu doing a fill battery disconnect for ~40 minutes to an hour and then reconnecting. There is a sequence to learn it properly regarding how long to idle, how long to run AC, etc. but I don't know the specifics of it. I would do a KAM reset (you can do that from the SCT X4 device too) and then battery for a full reset.

Additionally, I would check with ford if they moved shift points, or adjusted anything else regarding shifts.

 
derfdog15 said:
Do you have any codes or otherwise? When I toasted something in the SHO (never found out what) I was getting an underboost condition code, as it would only make 4PSI. I chased a lot other than physically checking turbos and never found anything.

Are you able to put the truck in M to make it hold gear? Would be interesting to see boost with it rev'd out and holding.

You mentioned exhaust, was that done before or after the issue presented? Could be an exhaust pressure issue if it was done afterwards.

Additionally, what tuner do you have (actual device)? The SCT X4 has a CAM reset option, and the TCM can be reset bu doing a fill battery disconnect for ~40 minutes to an hour and then reconnecting. There is a sequence to learn it properly regarding how long to idle, how long to run AC, etc. but I don't know the specifics of it. I would do a KAM reset (you can do that from the SCT X4 device too) and then battery for a full reset.

Additionally, I would check with ford if they moved shift points, or adjusted anything else regarding shifts.
Click to expand...
No codes at all through all of this. I really wish it would throw a code so i could maybe get another idea. I have tried the manual mode. Again only allowing 7lbs max and will drop as climbing the hill. Exhaust has been on the truck now for over 5 years without any issues so i dont believe thats the problem. I have an sct x4. I have done multiple kam resets with no change after doing so. I will have to disconnect the battery today for an hour and see what happens. The ford dealer claims that shifts couldve been changed, but theyre not fully sure.  Again like i said my dad has had the same recall, and his runs perfect. I even checked his strategy with the x4 and his strategy is the same as mine.
 
My next thought is the boost control solenoid. Its a $30 part that routes to each turbo, for the reference IIRC. There is a chance it is failing, but could also just be a part that gets thrown at the truck with no benefit. Up to you if its worth it to take a $30 gamble. If you're dad is OK with it, you may be able to swap the part and see if the issue switches trucks.
 
derfdog15 said:
My next thought is the boost control solenoid. Its a $30 part that routes to each turbo, for the reference IIRC. There is a chance it is failing, but could also just be a part that gets thrown at the truck with no benefit. Up to you if its worth it to take a $30 gamble. If you're dad is OK with it, you may be able to swap the part and see if the issue switches trucks.
Click to expand...
Yup ive tried his solenoid along with a brand new one. No change. I tried all his map sensors in mine. No change. Tried his bov along with a brand new one. No change. Even tried all his coil packs out of curiosity.  No change. I put 10lbs of pressure into the vaccum lines going to each wastegate to see if i had a leak. No leaks as it held the pressure no problem. Either this problem is so deep i cant find it or im overlooking the obvious. 
 
I guess the next question would be regarding the logs is the truck making the power its asking for? If the truck is meeting the demands of what it is asking for, then the issue would lay somewhere with the change in calibration.
 
I noticed on your initial post you mentioned new actuator's! Stock or aftermarket! If so do you have an updated revised Tune to accommodate the new Actuators! TOL. Z
 
derfdog15 said:
I guess the next question would be regarding the logs is the truck making the power its asking for? If the truck is meeting the demands of what it is asking for, then the issue would lay somewhere with the change in calibration.
Click to expand...
This im unsure of. Still waiting on another member looking into this to let me know. It does it both stock and tuned though.
 
ZSHO said:
I noticed on your initial post you mentioned new actuator's! Stock or aftermarket! If so do you have an updated revised Tune to accommodate the new Actuators! TOL. Z
Click to expand...
Stock replacement actuators from full race. They were set to the same specs as the originals the came off the truck. I can put pressure to them and they start to open and are fully extended with what specs are called for on the f150.
 
So ive had some logs read by a couple different people. All saying the truck is making the power it should and everything looks normal. I dont get it. When accelerating from a stop, the boost is "choppy", i can feel the truck surge until once up to speed.  Sometimes when shifting gears i see a huge spike in boost, sometimes 10lbs then settling back down. And once up to speed the boost will not climb any higher then 7lbs. This is the same on both the stock file and tune file.  Im at a complete loss. I have no idea what could be causing this. Everything ive done or tried has made no difference what so ever. I was told it could possibly be bad fuel, but ive ran about 3 full tanks of fuel through this thing since the problems started with no change. If anyone else has any suggestions im open to anything.
 
ZSHO said:
FWIW- I noticed there are 3 Spring rates available for the wastegate actuators! I'm assuming you went with the Oem replacement.
BTW do you have any PICS of the engine bay to share!  Z

Wastegate Spring - Low Boost (100% OEM replacement)

Wastegate Spring - Mid Boost (custom tuning recommended)

Wastegate Spring - High Boost (extreme applications)

https://www.full-race.com/store/ecoboost/f150-2015-2019/f150-big-turbo-2015-2019/2011-2016-f150-ecoboost-3-5l-wastegate-actuator/
Click to expand...
Correct oem low boost actuators. I even put the old ones back on thinking maybe i got sent the wrong ones. Still no change.
 
Have you tried to swap the MAP sensors? Sorry if this was already stated? Could be that you are measuring a certain level of boost, which is not the actual level of boost being made. Just something that comes to mind.

Additionally, if it is surging, then that is indicative of an issue with wastegate, or the boost control solenoid, if not turbos or an actual over pressurization within the intake, or some larger underlying problem.
 
derfdog15 said:
Have you tried to swap the MAP sensors? Sorry if this was already stated? Could be that you are measuring a certain level of boost, which is not the actual level of boost being made. Just something that comes to mind.

Additionally, if it is surging, then that is indicative of an issue with wastegate, or the boost control solenoid, if not turbos or an actual over pressurization within the intake, or some larger underlying problem.
Click to expand...
Tried cleaning the sensors, then replaced the sensors.  No change. replaced the watstegate solenoid with not change. Tried 2 sets of oem actuators set to oem specs with no change. I dont feel its turbos because it runs just fine at wot. I thought for sure i would throw a code yesterday while towing because it was an absolute dog but it did not. I did another boost leak test to see if i had missed anything the first time and again didnt find anything. I just dont understand.
 
Defhd10 said:
ZSHO said:
Defhd10 said:
Pic of engine
Click to expand...
The map sensor was left loose intentionally correct?  Z
Click to expand...
If your talking about the one on top of the intake manifold yes. All f150s only come with one bolt holding it down.
Click to expand...

Z is eluding that the MAP sensor in your picture looks like it is not secure.  Our MAP sensors on the SHO only have one bolt as well. 
 
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