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Problems With Rb25det In My R32

super_s13

By super_s13,
in Engines & Forced Induction

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super_s13 Community Regular

super_s13

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Ok i have recently brought a r32 with a rb25det in it. It is stock apart from a full 3'' exhaust and a FMIC. I am also running a hks power filter and a boost controller. Also got a malpassi FPR and a walbro fuel pump.

It is tuned at 185.5rwkw at 11psi. It was running pretty shit and the tuner said it had a really bad lean spot in it. He then upped the Fuel pressure by fiting the FPR and it was ok for a while. I then had intermittent problems of the car coughing and spluttering. Kinda like a massive missfire when changing to second gear. It was normally when turning a corner or entering a drift. I checked the fuel pump and all was ok apart from the fact that the pump was only getting 8 volts. I then ran a whole new wire on a circuit breaker and a relay so now it gets 13.4 volts.

The problem went away for a while but now is back. Has happened the last two days. As far as i know it is still on 11psi or lower. Could it be a boost spike or spark. I am really unsure and every time i take it to the tuner it doesnt do it. (f**k i hate that). Any suggestions that might help i am all ears.

Also i searched but cant find anything on this R&R and stock ecu boost problems over 10psi. Can you shed some light on that also Thanks.

Forgot to mention it is running a stock ecu and the Airflow meter is hitting 4.9 volts on 11psi. Been told it may have a high flowed turbo maybe. Cheers

Edited by super_s13
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super_s13 Community Regular

super_s13

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Oh yeah that is another mod that has been done. I will post a pic of the remote upgraded coil pack setup. Though that said it still may be a problem. Actually to be honest it has started after removing the Rocker covers so may be the prob as they had to come off to do that. Will look tomorrow.

Do you know why the air flow meter is doing that.

Also is 185.5rwkw a good number for a stock turbo FMIC, full 3'' zorst, fuel pump and FPR on 11psi

dsc01052qa3.jpg

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted
Oh yeah that is another mod that has been done. I will post a pic of the remote upgraded coil pack setup. Though that said it still may be a problem. Actually to be honest it has started after removing the Rocker covers so may be the prob as they had to come off to do that. Will look tomorrow.

Do you know why the air flow meter is doing that.

Also is 185.5rwkw a good number for a stock turbo FMIC, full 3'' zorst, fuel pump and FPR on 11psi

dsc01052qa3.jpg

200hp would be good or 200kw with a high flow turbo. Post up your dyno chart. What is happening to the air/fuel ratios? If it is leaning out at high revs/boost you could damage your engine. Have you tried turning the boost down to 10psi - does it make any difference?

  • 2 weeks later...
DLuded Mentor

DLuded

Posted
Posted

I used to have an r32 a while ago and randomly when driving it would sputter along pretty aggressively

I would feel as if i was driving along normaly, then slam the brakes on, then hit the accelerator again. It was actually pretty dangerous and would annoy the sh*t out of me

I changed the AFM and it was all fixed

BHDave Grand Master

BHDave

Posted
Posted

if the fault went away after you fixed the fuel pump wiring and then eventually came back then the fuel pump is the likely issue.

Add in that walbros don't like a lot of pressure and that there are plenty of dodgy copies out there and you are pretty much on the way to having it sorted.

I generally don't like the ex coil mods either. Been there done that, went back to splitfires....

super_s13 Community Regular

super_s13

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No offense to you, but get a diffierent tuner, if he uses a Fpr to fix a problem, then he is out of his depth. firstly do a trouble code check, compression test(to check the motor is still good) and check fuel pressure.

No i will stick with this tuner as he has fixed the problem. It was a dodgy fuel pump. He is a very good tuner up here and has a very big customer list with fast daily driven cars that are very drivable.

if the fault went away after you fixed the fuel pump wiring and then eventually came back then the fuel pump is the likely issue.

Add in that walbros don't like a lot of pressure and that there are plenty of dodgy copies out there and you are pretty much on the way to having it sorted.

I generally don't like the ex coil mods either. Been there done that, went back to splitfires....

Did this and checked the flow of the puel pump. At high RPM the fuel pressure drops to nothing replaced it with a 040 and is all good now. Thanks for all the replies.

Also the EX coils are going very soon. It was on the car when i brought it and my tuner has said to get rid of them and go splitfires. So this is happening. Thanks.

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