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My R34 Gtr Engine Noise At High Rev

NISSAN GTR

By NISSAN GTR,
in Engines & Forced Induction

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NISSAN GTR Veteran

NISSAN GTR

Posted
Posted (edited)

Hi was hoping for some help from people in the know yucky.gif

Lately when i give my GTR a squirt the engine makes a slight clattering noise and the engine light flashes on and off very quickly .

The noise occurs only at mid to high rev range about 5500 rpm to 7500 rpm

In the past before the issue with the noise , it did blow a fair amount of black smoke from time to time requiring a re-tune .

Could it be valve bounce ? I need some help !

My cars staying in the garage until i find out a bit more !

Thanks Guys

Edited by NISSAN GTR
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Duncan Grand Master

Duncan

Posted
Posted

Are you running a PowerFC? If so it is detecting pinging and flashing the light as a warning.

If you haven't moved the CAS, changed the boost or anything else it is most likely to be a dieing fuel pump, but get a mechanic to check it out.

BTW no real danger running around at low revs/boost/load. Just don't give it some, pinging can literally kill a turbo motor in seconds.

NISSAN GTR Veteran

NISSAN GTR

Posted
  • Author
Posted

Are you running a PowerFC? If so it is detecting pinging and flashing the light as a warning.

If you haven't moved the CAS, changed the boost or anything else it is most likely to be a dieing fuel pump, but get a mechanic to check it out.

BTW no real danger running around at low revs/boost/load. Just don't give it some, pinging can literally kill a turbo motor in seconds.

Yeah its running Power FC , would 91 RON unleaded cause pinging , my misses might have put 91 in by mistake . pinch.gif

levinboy Grand Master

levinboy

Posted
Posted

Yeah its running Power FC , would 91 RON unleaded cause pinging , my misses might have put 91 in by mistake . pinch.gif

Top up with some 98 then put a bottle of octane booster in it that should help, if it gets worse it may be a bigger problem

JustinP Mentor

JustinP

Posted
Posted

Ouch... That is it. Due to a number of reasons which I won't go into here my R34 had some 91 RON fuel put into it (also runs a PowerFC with no knock protection). Results - dead engine haha. The one upside is I get to rebuild it better, but that has almost been 2 years in making so far...

Drive it really carefully, whilst continually topping it up with 98 RON fuel till its filled with it.

Yeah its running Power FC , would 91 RON unleaded cause pinging , my misses might have put 91 in by mistake . pinch.gif

SargeRX8 Grand Master

SargeRX8

Posted
Posted

I wouldn't even drive the car. Get a siphon and pump that stuff out. 91? Lucky she didn't put E10... 3 successive blinks of the engine check light is a sign of detonation and it must be going hard out. Its not only about driving slow now, its also about not putting much load on the motor. If you tried to climb a hill with that fuel you will find it detonates.

Harey Veteran

Harey

Posted
Posted

I wouldn't even drive the car. Get a siphon and pump that stuff out. 91? Lucky she didn't put E10... 3 successive blinks of the engine check light is a sign of detonation and it must be going hard out. Its not only about driving slow now, its also about not putting much load on the motor. If you tried to climb a hill with that fuel you will find it detonates.

yup I agree siphon it out and put it in another car.

NISSAN GTR Veteran

NISSAN GTR

Posted
  • Author
Posted

Pics would help.....

She knows what goes in it 98 , but it was a genuine mistake just from the habit of using 91 in her own car . kiss.gifWomen arent perfect like us men wacko.gif. lol

N1GTR Grand Master

N1GTR

Posted
Posted

Depending on your fuel reg setup, you could unhook the return and put that into a bucket/jerry can, then start the car and let it idle until it stalls. Hook the reg back up and put in 98 - easy as. Did it on my GTR when making the swap to E85 and it didnt take long at all. On a separate occasion did the same thing but used the ECU to turn fuel pumps on and didnt start the engine.

Putting a tube down the fuel filler to syphon the tank is damn hard with a GTR fuel neck and you wont get as much as the fuel pump will anyway. Food for thought :)

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