Raptor911
FRF Addict
I never had a check engine light when I lost boost.
WOT then lost all boost..
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zombiekiller
OG BooBooRunner
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
King Dingaling
Using Forscan, you might try resetting the keep alive memory? I haven't had luck with disconnecting the battery on mine.
hedonist222
Full Access Member
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
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
JAndreF321
Full Access Member
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
FRF Addict
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
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
Thanks!
@Operator @FordTechOne
zombiekiller
OG BooBooRunner
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.
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