Jump to content
SAU Community

R32 Gtr Flooding Up

Grant T D

By Grant T D,
in General Maintenance

 Share

Recommended Posts

Grant T D Rookie

Grant T D

Posted
Posted

I have just bought a 1990 R32 GTR and have had it for two weeks now but only got to drive it for one.

The problem occured when i was driving along at 100 in 5th and the car fuel surged. It was just after i had filled the car up with fuel so initially thought it could have been bad fuel.

I gave it a bit of a strapping to see if i could get it to surge again but no such luck. The car was boosting up fine but seemed to be lacking abit of power.

I pulled up at an intersection and the car died on me. I started it up and it was flooding up and running rough. It wouldn't rev over 3,000 and was detonating popping flames out the exhaust. I babied it home and got to work the next day trying to find a problem.

The car starts and idles fine for the 1st 10 to 20 sec then starts to run abit rough then you give it a few revs and it sounds like its hitting a governer at around 3,000 and runs extremely rough at idle.

I replaced the spark plugs as they were foweled real bad. Problem still occured.

I figured i should start with the basics as it was running so rich and flooding the car up so much it may have been a fuel pressure problem. I grapped a set of pliers and held the car at about 1,500 where it was running really bad and applied pressure with the pliers to the fuel hose feeding the motor. Bingo car instantly ran better and i could now rev it to 5.000 before i couldn't regulate the fuel enough.

I replaced the fuel reg and still problem occurs. Replaced the Map sensor and still no help. Unplugged the AFM individually and they work like they should. I have had the scan tool on it from work and its showing no codes but indicates that the fuel mixture is rich which i already know by how much black smoke the car is pumping out. The others mechanics at work have as much idea about the car as me. I have checked the 3 main causes that contribute to this kind of problem but am lost on what to do next.

If anyone has encounted a problem like this or might know why the car is getting so much fuel please help.

One last thing the car is completely standard.

Link to comment
https://www.sau.com.au/forums/topic/367488-r32-gtr-flooding-up/
Share on other sites
mad082 Grand Master

mad082

Posted
Posted

generally a failing fuel pump should make it lean out, not run rich. and besides, all the fuel pump does is supply the fuel, the fuel pressure reg and injectors are what controls how much fuel makes it into the clyinders. my guess is that there is an issue with an injector or possibly even the fuel return line to the tank. i also wouldn't rule out the AFM just yet. it may be worth plugging in the scan tool when it is playing up and seeing what the voltage reading is. if it is drastically different between the 2 then one has an issue.

it may also be that you have an intake leak somewhere, since that will cause the car to run rich.

Grant T D Rookie

Grant T D

Posted
  • Author
Posted

No Issues with the fuel return checked that already. When the scan tool was plugged in there was no real difference with voltage for the AFM's. Am looking for an air leak but no luck as yet. Might chuck in some air flow meters just to be on the safe side but doesn't sound like there going to be the problem.

Grant T D Rookie

Grant T D

Posted
  • Author
Posted

Of all the things to go wrong. Blown off cooler pipe in front of LH wheel arch. Causing the AFM's to give a wrong signal. I dummied up an intake from the turbo's to the plennum cancelling out the cooler and car ran fine. Off with the front bar and fixed the problem. Glad its back and running fine.

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

    • Murray_Calavera
      R33 GTR running -9 with no tune

      By Murray_Calavera · Posted

      I don't understand how this hasn't boiled down to - Upgrade the turbo when you have everything required. ECU, injectors, fuel pump, turbo, etc. Do it all at once.  If you don't have everything required, just enjoy the car as it is and keep saving up your pennies. 
    • 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.
×
×
  • Create New...