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Diesel Engines A forum dedicated to diesel engines fitted to Volvo cars. See the first post in this forum for a list of the diesel engines. |
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D5 205 boost problemViews : 1802 Replies : 9Users Viewing This Thread : |
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Jul 21st, 2019, 21:21 | #1 |
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D5 205 boost problem
I've been chasing a performance issue for 6 months or so with my 2010 xc70 d5 205.It has a definite flat spot from 2600rpm to 3000rpm.There are no codes on vida and boost looks ok from what I can see.I did replace my bottom intercooler hose as it had a tiny pin hole in it and smoke tested the intake side of things with no obvious leaks detected.I did the smoke test as I feel it hisses too much under full throttle at lower rpms .
It's also fairly poor on fuel (28-30mpg) and compared to my 2004 xc70 d5 163(shark remap,egr delete, stainless exhaust and intercooler) it feel weak especially low on torque. I wonder if being the twin turbo set up that one of the plastic joining feed pipes might have split on the turbos but I cant find any info on it being an issue. Any info greatly recieved. Stuart
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1997 v70 SE tdi 1998 V70 T5 CD 1999 V70R tdi 1989 240glt 1994 940 d24 |
Jul 24th, 2019, 06:12 | #2 |
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Have you checked either of the turbos?
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Jul 25th, 2019, 10:43 | #3 |
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I've now physically checked the spindles for play now as they are extremely difficult to get to either.It makes boost but not as quick as it should according to Vida.I suspect the black plastic pipework connecting the two turbos is to blame but again you cant see.
I had an xc60 205 which blew the small turbo at 44k and the bill was massive to sort .I was hoping not to be that unlucky twice.
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1997 v70 SE tdi 1998 V70 T5 CD 1999 V70R tdi 1989 240glt 1994 940 d24 |
Aug 3rd, 2019, 08:01 | #4 | |
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Aug 4th, 2019, 22:44 | #5 |
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Last Online: Apr 23rd, 2024 18:02
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The smoke test wasnt to the same pressure as actual boost pressure and it only happens under peak boost.Ive checked all the other hoses and replaces any that I had any doubt over but I cant look down the back of the turbo set up and there is oil mist deposits down the back where the turbos are.I can live with the noise to be honest but the drop in power at 2500-2800rpm is annoying.
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1997 v70 SE tdi 1998 V70 T5 CD 1999 V70R tdi 1989 240glt 1994 940 d24 |
Aug 5th, 2019, 20:36 | #6 | |
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Previous -03 S40, 04 V70 D5, 04 V70 D5 Sport, 05 V50, 07 S60 D5, 09 V70 D5 R design, 12 XC60 DrivE, 15 V60 D3 Current- 05 XC90 D5 Exec, 12 XC70 D4 AWD Se Lux, 14 S80 D3 Se Lux |
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