Map sensor no boost

[Bori813]

What creates pressure in the intake I checked the boost sensor but there's no pressure coming out of the nipple towards the sensor

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[Bori813]

How can I check the egr valve to make its closing and in good working order

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[ghohouston]

Your problem is with your exhaust backpressure sensor, the wiring to the sensor, or the tube/fitting in the exhaust manifold is clogged. At idle, you should read around 14-15ish psi, not 2. Your turbo creates the "pressure" in the intake manifold, but you're not going to feel it at idle, no matter how much you rev it.

 

[Bori813]

chip and showing when I reb up 10 - 12 on exhaust back-pressure reading how can I check the sensor to make sure that's what I

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[6.0 Tech]

Your problem is with your exhaust backpressure sensor, the wiring to the sensor, or the tube/fitting in the exhaust manifold is clogged. At idle, you should read around 14-15ish psi, not 2. Your turbo creates the "pressure" in the intake manifold, but you're not going to feel it at idle, no matter how much you rev it.

Truck is an 03. It has inferred ebpg only. There is no ebpa available due to the tuning in the pcm. I thought that as well till i read back and its an 03.

 

[6.0 Tech]

What creates pressure in the intake I checked the boost sensor but there's no pressure coming out of the nipple towards the sensor

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Pressure in the intake would be built by the turbo. Try pulling the intake elbow off, and see if the throttle plate is stuck closed or something maybe.

 

[Bori813]

OK thanks

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[Bori813]

Well just checked the throttle plate and it's open so that's good what's next

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[6.0 Tech]

Have you checked for boost leaks? Specifically the intercooler for a tank blown off? If you stick a long screw driver and kinda pry the rubber chit away from it on the passenger side, you can typically see if the crimps have split. If you see orange or blue o ring, its definitely blown.

 

[Bori813]

Yep checked that but this morning I disconnected the map sensor and I started to get boost same pics

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[Bori813]

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[6.0 Tech]

Seems like it may be a wiring issue. You should not be reading 2 psi with it unpligged. It should be 0 if i remember right.

 

[Bori813]

It's showing 5 psi this is crazy

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[Bori813]

Well just got a hold of my friends snapon got this codes

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[6.0 Tech]

Seems like the vgt soleoid wiring is ***ked orthe solenoid is bad, just judging by the p0046

 

[Bori813]

Well I'm here looking at the truck running right now the vgt are going from 85% - 14% so it must be working am I correct

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[6.0 Tech]

Is it switching dlfast? Or is it kinda slowly stepping up and down? Also, does the exhaust change pitch when its cycling?

 

[Bori813]

Just noticed that the Baro PSI are stuck at 14.7 would that make the truck run with no boost

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[6.0 Tech]

No, baro should be steady, as it is the atmospheric pressure you are at.

 

[Bori813]

I'm getting this readings on cts

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