WOT then lost all boost..

[Raptor911]

I never had a check engine light when I lost boost.

 

[zombiekiller]

Thank you for all the replys!







I have a cold air intake installed, I will check that sensor and the mounting location, however not sure how to diagnose if its bad. Wouldn't I see a dtc in forscan pointing to a sensor out of range?

JB4 is removed.

It should be sealed tightly with the sensor perpendicular to airflow ( "wide" side allowing air to pass through.)

If the blue diode in the middle is touching the plastic, it should be replaced.

You can try using some compressed air to clean it off.

You would not necessarily see a dtc other than the low pressure one that you're getting.

I'd also check to make sure that there are not any holes rubbed into the plastic tubing from the turbos to the air box. Also check for any abrasions in the elbows.

The truck thinks that you have an air leak someplace.

 

[GCATX]

Using Forscan, you might try resetting the keep alive memory? I haven't had luck with disconnecting the battery on mine.

 

[hedonist222]

the 997 model Porsche 911 turbos had a manufacturer defect
The two pipes that join into one as a manifold and then connect to the engine would come off
The O ring would deform from heat - turn from cylindrical shape to oval so the clamp couldn't hold in it

it was quite the spectacle when it came off - a huge boom

Porsche replaced it with a reinforced O ring

but the tubines would still spool up and then whooosh away

 

[Operator]

Thank you for everyone that has replied and tried to help. I finally got the truck in to the dealer today. Cause for no boost and no codes was timing out of spec due to cam phasers.

 

[JAndreF321]

OP, glad they figured it out! Reading through I would have asked about charge pipe cracking...I’m not a fan of plastic everything, especially on these trucks; the plastic feels like something from Harbor Freight

 

[FordTechOne]

Thank you for everyone that has replied and tried to help. I finally got the truck in to the dealer today. Cause for no boost and no codes was timing out of spec due to cam phasers.

That diagnosis is not adding up..the PCM continuously monitors the timing on both banks via each Camshaft Position Sensor (CMP); this can be viewed on a scan tool as VCT angle. There is also a VCT_ERR pid, which provides the difference (in degrees) between the PCM's commanded VCT position and the actual VCT position. For the engine to be out of time enough to not product boost, the error PID would well exceed the threshold to set a timing related DTC.

Keep us posted.

 

[Operator]

That diagnosis is not adding up..the PCM continuously monitors the timing on both banks via each Camshaft Position Sensor (CMP); this can be viewed on a scan tool as VCT angle. There is also a VCT_ERR pid, which provides the difference (in degrees) between the PCM's commanded VCT position and the actual VCT position. For the engine to be out of time enough to not product boost, the error PID would well exceed the threshold to set a timing related DTC.

Keep us posted.

While standing in the service department I asked that very same question. How can it be that far out of time without any related dtc's? Parts are supposed to show up Monday and I'm supposed to have the truck back Tuesday at some point. I will definitely keep everyone posted

 

[Proflyer]

What was the verdict here? I just had the exact same issue come up last night. I have a JB4, and a whipple stage one kit. Truck has ran perfectly since the cam phaser change about 5k ago. Disabled the JB4, still no boost. No boost in the logs of the JB4 or on the dash dummy guage. No CELs either. Just randomly on the way home last night it went into what I'd call a limp mode with no boost. Had been running fine for 30min or so before that. Curious what the dealer ended up doing so I can call mine and hopefully get something sorted in the right direction.

Thanks!

@Operator @FordTechOne

 

[zombiekiller]

What was the verdict here? I just had the exact same issue come up last night. I have a JB4, and a whipple stage one kit. Truck has ran perfectly since the cam phaser change about 5k ago. Disabled the JB4, still no boost. No boost in the logs of the JB4 or on the dash dummy guage. No CELs either. Just randomly on the way home last night it went into what I'd call a limp mode with no boost. Had been running fine for 30min or so before that. Curious what the dealer ended up doing so I can call mine and hopefully get something sorted in the right direction.

Thanks!

@Operator @FordTechOne

step 1: burn the JB4. ( they are quite possibly the worst thing ever. they WILL malfunction and potentially cost you a new motor.)


step 2: Check for boost leaks.