Your opinion pls about this problems - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

johnny_0 · 9th July 2008, 07:25 AM

Hello,

Yesterday evening the boost of a BNR33, of a my friend, dropped to "0" during a normal run. Both the MFD the blitz boost controller show this value "0" and now the car run without turbos power. No strange noise from turbo or engine, all temperature are ok. No blue smoke from exhaust.

What do you thing? Could it be a turbo fault?

Thks in advance

Carlo

Abbey M/S · 9th July 2008, 07:30 AM

sounds like the exhaust wheel has fallen off of one of the turbo,s.

johnny_0 · 9th July 2008, 07:58 AM

Quote:

Originally Posted by Abbey M/S

sounds like the exhaust wheel has fallen off of one of the turbo,s.

Thank you Mark (if you are) for your feedback. My friend will check his car in the next days. Sent you an PM also.

Abbey M/S · 9th July 2008, 08:21 AM

1 more thing are they STD or uprated turbo,s?

johnny_0 · 9th July 2008, 08:25 AM

Hello Mark,

I wrote you an Pm with some details. However they are uprated.

Abbey M/S · 9th July 2008, 08:36 AM

Has the car a Power FC fitted with Hand controller?

johnny_0 · 9th July 2008, 08:46 AM

yes his car has a power fc and an blitz i-color boost controller. Both already fitted when he bought the car. The normal boost is 1.30bar max 1.40.

Abbey M/S · 9th July 2008, 09:28 AM

when driving the car now can you look at the airflow meter voltages , can you see if these numbers are greatly different, this will tell us if the turbo,s are still being driven by the exhaust gases via the turbine wheels.

mifn21 · 9th July 2008, 09:48 AM

If both AFM voltages read low could it mean a boost hose/pipe has come off?

Abbey M/S · 9th July 2008, 09:58 AM

Quote:

now the car run without turbos power. No strange noise from turbo or engine, all temperature are ok. No blue smoke from exhaust

If the car had a boost pipe off it would black smoke would not rev out.

frostmotorsport · 9th July 2008, 11:11 AM

surely if an exhaust wheel came off you would hear and feel it??? I thought that would be pretty catastrophic.... and the other turbo should still make boost??

I would say a vacuum pipe has popped off a sensor or similar.... no??

Abbey M/S · 9th July 2008, 11:49 AM

yeah they other turbo will try to make boost but the charged air will take the easiest route which is back down the inlet to the non working turbo charger.

Even if it has a pipe off of the boost controller the car would still make base boost which according to the chap asking questions ot dives a sit make NO boost.

johnny_0 · 9th July 2008, 12:24 PM

Thks for replies. My friend tonight, or tommorow, will check the Afm values on commander, like Mark said. In every case really no noise from engine. I really hope that is not a turbo fault.

When the car dropped power (and "0" bost) i was in the car and i did not heard strange noise.

Another info that i just received. In the car has been fitted a wideband. My friend said to me that after this trouble the engine is now a little rich. Before In idle the value were 14.5 now is 12.8/13.5 (not always costant value).

If the solenoid is in fault, the turbos should go to std pressure (about 0,8 bar)? In this case, with solenoid out, the MFD can read this pressure (0,8bar )or it could show "0" like in this case?

johnny_0 · 15th July 2008, 04:33 PM

Hello,

the problem has been solved

. There was a rubber pipe with a large cut on it. It is the pipe in the T connector (see the pic).

Regards

Abbey M/S · 15th July 2008, 05:01 PM

thats good , but the car must of been pulling some boost. You said it had no boost.....the boost must off been at base boost.....at least it was not anything major.

9th July 2008, 07:25 AM	#1 (permalink)
johnny_0 GTR Register Member Join Date: Dec 2003 Location: Novara - Italy Posts: 251	Your opinion pls about this problems Hello, Yesterday evening the boost of a BNR33, of a my friend, dropped to "0" during a normal run. Both the MFD the blitz boost controller show this value "0" and now the car run without turbos power. No strange noise from turbo or engine, all temperature are ok. No blue smoke from exhaust. What do you thing? Could it be a turbo fault? Thks in advance Carlo

9th July 2008, 08:25 AM	#5 (permalink)
johnny_0 GTR Register Member Join Date: Dec 2003 Location: Novara - Italy Posts: 251	Hello Mark, I wrote you an Pm with some details. However they are uprated. Last edited by johnny_0; 9th July 2008 at 08:29 AM.

9th July 2008, 12:24 PM	#13 (permalink)
johnny_0 GTR Register Member Join Date: Dec 2003 Location: Novara - Italy Posts: 251	Thks for replies. My friend tonight, or tommorow, will check the Afm values on commander, like Mark said. In every case really no noise from engine. I really hope that is not a turbo fault. When the car dropped power (and "0" bost) i was in the car and i did not heard strange noise. Another info that i just received. In the car has been fitted a wideband. My friend said to me that after this trouble the engine is now a little rich. Before In idle the value were 14.5 now is 12.8/13.5 (not always costant value). If the solenoid is in fault, the turbos should go to std pressure (about 0,8 bar)? In this case, with solenoid out, the MFD can read this pressure (0,8bar )or it could show "0" like in this case? Last edited by johnny_0; 9th July 2008 at 12:37 PM.

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9th July 2008, 07:30 AM	#2 (permalink)
Abbey M/S GTR Register Member Join Date: Feb 2002 Location: The workshop... Posts: 1,922	sounds like the exhaust wheel has fallen off of one of the turbo,s.

9th July 2008, 08:21 AM	#4 (permalink)
Abbey M/S GTR Register Member Join Date: Feb 2002 Location: The workshop... Posts: 1,922	1 more thing are they STD or uprated turbo,s?

9th July 2008, 08:36 AM	#6 (permalink)
Abbey M/S GTR Register Member Join Date: Feb 2002 Location: The workshop... Posts: 1,922	Has the car a Power FC fitted with Hand controller?

9th July 2008, 08:46 AM	#7 (permalink)
johnny_0 GTR Register Member Join Date: Dec 2003 Location: Novara - Italy Posts: 251	yes his car has a power fc and an blitz i-color boost controller. Both already fitted when he bought the car. The normal boost is 1.30bar max 1.40.

9th July 2008, 09:28 AM	#8 (permalink)
Abbey M/S GTR Register Member Join Date: Feb 2002 Location: The workshop... Posts: 1,922	when driving the car now can you look at the airflow meter voltages , can you see if these numbers are greatly different, this will tell us if the turbo,s are still being driven by the exhaust gases via the turbine wheels.

9th July 2008, 09:48 AM	#9 (permalink)
mifn21 GTROC Member Join Date: Mar 2007 Location: London Posts: 2,049	If both AFM voltages read low could it mean a boost hose/pipe has come off?

9th July 2008, 11:11 AM	#11 (permalink)
frostmotorsport GTR Register Member Join Date: Aug 2007 Location: Wellington, NZ Posts: 765	surely if an exhaust wheel came off you would hear and feel it??? I thought that would be pretty catastrophic.... and the other turbo should still make boost?? I would say a vacuum pipe has popped off a sensor or similar.... no??

9th July 2008, 11:49 AM	#12 (permalink)
Abbey M/S GTR Register Member Join Date: Feb 2002 Location: The workshop... Posts: 1,922	yeah they other turbo will try to make boost but the charged air will take the easiest route which is back down the inlet to the non working turbo charger. Even if it has a pipe off of the boost controller the car would still make base boost which according to the chap asking questions ot dives a sit make NO boost.

15th July 2008, 04:33 PM	#14 (permalink)
johnny_0 GTR Register Member Join Date: Dec 2003 Location: Novara - Italy Posts: 251	Hello, the problem has been solved . There was a rubber pipe with a large cut on it. It is the pipe in the T connector (see the pic). Regards

15th July 2008, 05:01 PM	#15 (permalink)
Abbey M/S GTR Register Member Join Date: Feb 2002 Location: The workshop... Posts: 1,922	thats good , but the car must of been pulling some boost. You said it had no boost.....the boost must off been at base boost.....at least it was not anything major.