Map sensor no boost

Bori813 · Jan 17, 2017

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 · Jan 17, 2017

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

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ghohouston · Jan 17, 2017

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 · Jan 17, 2017

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 · Jan 17, 2017

ghohouston said:
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 · Jan 17, 2017

Bori813 said:
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 · Jan 18, 2017

OK thanks

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Bori813 · Feb 15, 2017

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

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6.0 Tech · Feb 15, 2017

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 · Feb 16, 2017

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

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Bori813 · Feb 16, 2017

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6.0 Tech · Feb 17, 2017

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 · Feb 17, 2017

It's showing 5 psi this is crazy

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Bori813 · Feb 20, 2017

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

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6.0 Tech · Feb 20, 2017

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

Bori813 · Feb 21, 2017

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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