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R34 Gtt Boost Sensor

S4T4N

By S4T4N,
in Engines & Forced Induction

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S4T4N Contributor

S4T4N

Posted
Posted

Hi there.

Just wondering if anyone knows exectly what this part do? I could be searching with the wrong keywords but I can't find much details about this part in the forum and nothing much in the R34 Service Manual as well.

The tube connecting to mine has broken off and i've just reglued it back. I was looking around for used parts and and neo32 mentioned that it's only for boost cut?

I just want to know more about it before i just remove it altogether.

The part has the following details one it:

PS66-01

HITACHI BOOST SENSOR

It sits near the firewall and photos are attached on how it looks like. It is connected directly to the vacuum(orange thing)

post-a269400-DSC00285-Small-.JPG

post-a269399-DSC00283-Small-.JPG

Thanks.

Sue

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QWK32 Veteran

QWK32

Posted
Posted

its just for an overboost protection that the stock ecu has. if the little plastic nipple has broken off the bottom of it don't worry, just block off the vacuum line going to it, and leave the sensor plugged in. if you unplug it and remove the sensor it will throw a DTC and the engine check light will come on.

STATUS Grand Master

STATUS

Posted
Posted
its just for an overboost protection that the stock ecu has. if the little plastic nipple has broken off the bottom of it don't worry, just block off the vacuum line going to it, and leave the sensor plugged in. if you unplug it and remove the sensor it will throw a DTC and the engine check light will come on.

DO NOT DO THIS.

The boost sensor also is referenced mixture control (extra tables, not present in R33 ecu's), blocking it off immediately results in the car running 1-2 A/F's LEANER.

lachlanw Veteran

lachlanw

Posted
Posted
wow ^^^ that could be dangerous. Obviously 34's much more advanced in ecu

On a 32 it just does the stock boost gauge in the dash, unplugging the wire connection seems to have no effect on the tune what so ever.

they have one for the for the gauge aswell . . if it rund disgustingly rich 10 to 1 not un common then unplugging it will give a nice 12 to 1 . lol rangi but there could be somtethign behind it . there have beena few stageas that people bought with it blocked off and they havent blown up yet?

aleks Community Regular

aleks

Posted
Posted
DO NOT DO THIS.

The boost sensor also is referenced mixture control (extra tables, not present in R33 ecu's), blocking it off immediately results in the car running 1-2 A/F's LEANER.

Shouldn't be a problem leaving it disconnected and getting the car retuned? Ignoring the computer codes/engine light or are there any other problems with this?

STATUS Grand Master

STATUS

Posted
Posted
Shouldn't be a problem leaving it disconnected and getting the car retuned? Ignoring the computer codes/engine light or are there any other problems with this?

Provided it is tuned with it unplugged or blocked, it is fine. But dont unplug it unless it was set up to run that way especially with a remap or safc etc.

QWK32 Veteran

QWK32

Posted
Posted
DO NOT DO THIS.

The boost sensor also is referenced mixture control (extra tables, not present in R33 ecu's), blocking it off immediately results in the car running 1-2 A/F's LEANER.

just curious trent as to which tables you are talking about? is it one that can been seen from in nistune or a background ecu table that can't be seen? i honestly didn't notice any difference in AFR's once disconnecting mine.

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