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34 Gtt Boost Sensor

whitneybra
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GTSBoy Grand Master

GTSBoy

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Posted

How would i go about making sure this part is working in the same way as the origanl.

You mean once you install it? Start it up and drive it. If it doesn't shit itself, then it's working.

You probably need to understand that this sensor is juts a pressure transducer. It will convert pressure measured on a piezoelectric into volts. Most such sensors are 0-5v output. Most Nissan turbos run about the same amount of boost - regardless of whether we're talking about old petrols like the R34 or newer diesels like the Navara. And here is where it gets interesting. Assuming that the Navara runs higher boost (it probably does, being diesel) then if there is any difference at all between the R34 and the Navara sensors it will most likely be that the Navara unit puts out less volts for a give pressure (ie it will be ranged higher). And this is good because if you put it onto an R34 ECU then the ECU should think it's seeing less boost, and you can go do a little dance and walk away happy.

Now, given the likely price of this sensor I'm surprised you haven't just bought it, fitted it and been happy already. I would have.

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Mitchee
Mitchee

Interestingly, i know of a GTT that gets driven daily that does not have this sensor present as it broke so I unplugged it.. Has no problems at all and has never missed a beat?

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whitneybra Enthusiast

whitneybra

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You mean once you install it? Start it up and drive it. If it doesn't shit itself, then it's working.

You probably need to understand that this sensor is juts a pressure transducer. It will convert pressure measured on a piezoelectric into volts. Most such sensors are 0-5v output. Most Nissan turbos run about the same amount of boost - regardless of whether we're talking about old petrols like the R34 or newer diesels like the Navara. And here is where it gets interesting. Assuming that the Navara runs higher boost (it probably does, being diesel) then if there is any difference at all between the R34 and the Navara sensors it will most likely be that the Navara unit puts out less volts for a give pressure (ie it will be ranged higher). And this is good because if you put it onto an R34 ECU then the ECU should think it's seeing less boost, and you can go do a little dance and walk away happy.

Now, given the likely price of this sensor I'm surprised you haven't just bought it, fitted it and been happy already. I would have.

Just plugging it in and running the risk it doesnt do damage doesnt sound like the best idea. If it does read slightly different then a tune would fix it only problem is the location of the car is kalgoorlie.

If it sends lower voltage for the same boost level as the standard one then the euc would think its getting less air then it is and inject less fuel causing lean wouldn't it.

whitneybra Enthusiast

whitneybra

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Well if thats the case happy days. So why if it only uses it for protection does the car run like shit now even when its plugged in. Do you have any ideas why did the tuner bother to fix it when they installed nistune. Im not trying to be smart.

GTSBoy Grand Master

GTSBoy

Posted
Posted

It has to work, or the ECU doesn't like it at all. Many have tried to run Neos without it plugged in and failed. If it is electrically borked it is quite possibly equivalent to not being plugged in. I don't think even turning off the flag for it in Nistune compensates for it not being plugged in (I haven't tried it on mine) - and that assumes that the guys tuning it know you can get around the sensor's boost cut by turning off the flag. They might not have known. And of course, they might have had to fix the sensor if it was broken in a way that meant the ECU thought it was effectively unplugged.

whitneybra Enthusiast

whitneybra

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The little air tube has broken off it was cracked and they glued it back on but has broken again. i remeber them saying they only found it as the ecu was seeing boost fluxuations. something like that

whitneybra Enthusiast

whitneybra

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Ive never heard of that place and no nissan was a last choice. After quickly checking Amayama comes up with the other part nissan said i could get.

http://www.amayama.com/search/?q=22365-6p500&cur=AUD

Missileman Veteran

Missileman

Posted
Posted

Thats is not the correct one, its the gauge sensor.

Once you have the correct part number search here.... http://www.amayama.com/search/

To get the correct part number try here http://nissan.epc-data.com/skyline/er34/

Also Use their russian pages as they have pictures of the parts... http://nissan.epcdata.ru/skyline/er34/3952-rb25det/

whitneybra Enthusiast

whitneybra

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Posted (edited)

Thats is not the correct one, its the gauge sensor.

Once you have the correct part number search here.... http://www.amayama.com/search/

To get the correct part number try here http://nissan.epc-data.com/skyline/er34/

Also Use their russian pages as they have pictures of the parts... http://nissan.epcdata.ru/skyline/er34/3952-rb25det/

Thanks heaps those web pages are very help full.

I found the sensor i want in the russan picture

Interestingly, i know of a GTT that gets driven daily that does not have this sensor present as it broke so I unplugged it.. Has no problems at all and has never missed a beat?

I'm under the impression now after everyones help that i have another problem and i only found this when i started looking.

Edited by whitneybra
Sinista32 Grand Master

Sinista32

Posted
Posted (edited)

Off Topic

On your diagram you will also find "14920" plastic pipes will break off. (valve control). That one doesn't matter much either

it runs one pipe to the charcoal canister to re-use the fumes. Again they're NLA and a replacement part off a Navara is used.

The plastic pipes are larger and the bolt holding it is larger so some modification required.

Go second hand on parts form a Jap wreckers. Any RB25 NEO motor will have these.

Cheap quick option

A few pages now. Perhaps take your car in and get a mech to identify your real issue/s.

Edit

Oh and if it's running like shit, not boosting etc..

Try looking at all your IC piping for a split or even one blown off

Edited by Sinista32

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