Jump to content
SAU Community

Boost Gauge Not Detecting Boost On R34 Gtr

Phatboy

By Phatboy,
in Engines & Forced Induction

 Share

Recommended Posts

Phatboy Mentor

Phatboy

Posted
Posted

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.

GeeTR Grand Master

GeeTR

Posted
Posted (edited)

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 by GeeTR
Rkay77 Rookie

Rkay77

Posted
Posted

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 Mentor

Phatboy

Posted
  • Author
Posted

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 Grand Master

paulr33

Posted
Posted

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

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Duncan
      R33 GTR running -9 with no tune

      By Duncan · Posted

      Sounds like you've got an interesting adventure ahead here with local support if you have trouble! My guess is that, unboosted, you will be OK with a small upgrade like -9. What will happen is that once the stock ECU sees more airflow than it expects it will add a heap of fuel and pull a heap of timing to be safe because it can't understand how it could get that much air without there being an issue. You will see clouds of black smoke and it won't pull hard through the midrange and top end. So, overall it will be a bit frustrating but should be OK. If you are still nervous set the base timing back 2o through the CAS, but it will be even more sluggish everywhere. As said above through...this is not my guarantee your engine won't be blown into a million pieces, leaving you looking for very hard to find parts A better idea is get a computer with logging ASAP, wire in a wide band O2 sensor and a use remote tuner. I've done multiple cars this way and while it is not as good as a specific tune on a dyno they can get it 90% right. I'd suggest if you can afford an R33 GTR these days you can afford an ECU and tune. And if you can't afford that you sure won't be able to afford the rebuild if it goes bad in the meantime,.  
    • Duncan
      New kid on the block

      By Duncan · Posted

      Yeah it would be nice if someone took the time to put that sort of information together, but there are a lot of variations in looms. I think you are making this way hard for yourself if you just want to get it running....sourcing an SR20 with the right wiring will be a billion times easier than matching the RB loom to an S15 chassis. If you do end up going this way, you just need to trace every wire in the loom with a multimeter, 95% of them will go to a location you can confirm at the ECU.....and then post it up for the next person who needs it  
    • Duncan
      Coolant leak?

      By Duncan · Posted

      Just top it up with water, and keep a general idea of how much you added. It is normal for water to be pushed into and pulled out of the reservoir through the cap, and it should not be more than half full or it will be likely to overflow when hot. Any decent mechanic can do a pressure test of the cooling system to confirm if you have a leak. Keep in mind if it is only leaking a little and when hot it may well evaporate before you see it hit the ground
    • GTSBoy
      Coolant leak?

      By GTSBoy · Posted

      I'd ask the shop what they used and use that. Mixing coolants is sometimes OK, sometimes not, and you have know the details of each coolant to know whether it's a good idea or not.
    • Chupapy
      Coolant leak?

      By Chupapy · Posted

      Is it alright to top up with just another green coolant?
×
×
  • Create New...