Boost Gauge Not Detecting Boost On R34 Gtr

[Phatboy]

Hi guys, just wanted to get your opinion on something.

I was planning to buy a specific R34 GTR, but there is a problem with the boost gauge on the Multi-Function Display not sensing any boost occasionally. If I restart the car it usually works again. The Power FC usually has no probs detecting boost. It is only running 1.0-1.1 bar.

Other mods include HKS dump pipe, adj cam gears, catback.

Does anyone know what is going on? Something wrong with the sensor or its connection? How much do you think it will cost to repair?

Cheers. Any help much appreciated as always.

[R31Nismoid]

I'd say it would be sensor or connection to be honest.

If the PFC is registering, the car is obviously making boost - meaing its a sensor/input related problem

[Phatboy]

Thanks, that what I thought.

Any idea how much it would cost to repair? No-one seems to know.

[GeeTR]

If its a dud sensor, then it would be the cost of the sensor i would imagine. If a R34 is like a BNR32, the sensor that feeds the dash gauge is high on the drivers side firewall. Maybe loose plug? Check its part # and swap it out with another one.

Is the PFC using MAP based load, or have you got the boost control kit connected?

Edited May 6, 2008 by GeeTR

[Phatboy]

Oh man, this is getting way too technical for me. Not sure how the PRF is tuned.

Someone just told me recalibrate the sensor through the MFD. Will try that first.

Cheers.

[Rkay77]

I got the same problem. there's at least one other gtr 34 i know of with the same fault.

I managed to fix it a while ago by opening up the boost sensor and cleaning the circuit board with cleaner. It worked flawlessly for about 3-4 weeks and only recently has started dropping in and out.

I also have Power FC...do you have the boost controller as well as I was told that was the only way you would see the PFC show boost on the hand controller. I ask because when I first got the car but didnt know much about the hand controller I do recall seeing the boost/vaccum readout. Now I don't but when running a sensor check I get a voltage showing.

I'm going to try and clean the sensor circuit board again and when I get a chance, swap sensors with another 34 (don't think it needs to be GTR) and see if that fixes it so I know what I need to buy.

p.s If you do a search for your topic or something like it, you should find my original post from a few months back

[Phatboy]

Thanks for the advice Rkay77! Now I know that I'm not the only one! Did you get the Nismo MFD + sensors in the end?

I would get it if it fixed up the boost gauge. Do you know how much it would cost + install?

[paulr33]

the hand controller wont read boost from the stock map sensor as its in a different range / reading

to have the hand controller display BOOST correctly you need part of the boost control kit loom and the map sensor

the parts are around $200 in total and takes about 5 minutes to install

you need the boost control kit loom (3 pin version pretty sure) and the denso map sensor