Turbo doesn't kick in

[Grumpygra]

G'day
I have a 2009 3ltr turbo Patrol and since this morning I have an engine warning light on and the Turbo doesn't kick in. Has anyone ever had a faulty Boost Sensor and if so what were the symptoms because I am hoping thats all it is. The car has a "pressure/vacuum" gauge fitted which is showing zero or very little pressure when I accelerate.
Thanks in advance
Graeme

[Sir Roofy]

G'day
I have a 2009 3ltr turbo Patrol and since this morning I have an engine warning light on and the Turbo doesn't kick in. Has anyone ever had a faulty Boost Sensor and if so what were the symptoms because I am hoping thats all it is. The car has a "pressure/vacuum" gauge fitted which is showing zero or very little pressure when I accelerate.
Thanks in advance
Graeme

Have you tried cleaning the Maf sensor get a can from repco or any of those shops
and give it a good spray don't touch the wires inside spray air dry see how that goes
if theres an oily film there id suggest a catch can to help in the future

[Yendor]

Check your hose connections on the intercooler make sure one hasn't popped off

[Grumpygra]

Thanks Roofy
I actually have a new MAF sensor (the guy I bought the car off gave it to me....wonder why) which I was going to change but I need an Allen key with the hole at the end.

[Grumpygra]

Thanks Yendor
Tried that but I will recheck.

[the evil twin]

Thanks Roofy
I actually have a new MAF sensor (the guy I bought the car off gave it to me....wonder why) which I was going to change but I need an Allen key with the hole at the end.

They are called "security torx" fasteners.
Best off getting them in a 1/4 or 3/8 socket drive version from, say, Supercheap.
There are other ones here and there around the engine as well in larger sizes

[threedogs]

I wouldnt think you'd need a vacuum on your gauge
http://www.ebay.com.au/itm/Quick-Fit...3D331826886100
Where are you getting your boost readings from.??
You're not blowing heaps of black smoke are you?

[Grumpygra]

Thanks threedogs
Forget the vacuum part. Its just a pressure gauge with a hose coming out of the front of an adaptor block under the "boost sensor".
I changed what I think is the MAF sensor (the sensor just after the air filter) with a new one I had but no difference. Its not blowing smoke. It sounds a lot louder than usual. I checked for any hoses that have come off but couldn't find any. I'm a bit baffled! Is the MAF sensor the same as the MAP sensor?
Thanks Evil Twin. I got a set of security torx fasteners from bunnings.

[the evil twin]

MAF - manifold Air Flow, the sensor near the air box on the inlet plumbing

MAP - Manifold Air Pressure, the sensor on the intercooler outlet plenum

[Hodge]

I know you said you checked all hoses, I'm assuming air hoses, for example the intercooler hoses etc...
But have you checked the vacuum hoses that go between the vacuum solenoid, turbo actuator etc... ?