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850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 and P80-platform 70-series models |
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Turbo Whoosh Noise on deceleratingViews : 2036 Replies : 18Users Viewing This Thread : |
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Jul 11th, 2018, 20:39 | #11 | |
C70 T5
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I instead fitted a Forge Motorsport unit (bit cheaper than OEM volvo) and its a piston type so will not split. https://www.forgemotorsport.co.uk/Re...duct--787.html - If you decide on this this, just call them to double check your car and part number)
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2000 C70 T5 GT Coupe 1998 S70R / 1995 Toyota Supra Twin Turbo 2007 Mercedes CLS 320 CDI / 2011 Mercedes S350 Bluetec 2007 Suzuki GSXR-1000 Last edited by DSK; Jul 11th, 2018 at 20:42. |
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Jul 11th, 2018, 23:42 | #12 |
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I went Kinuwgawa in the end
Last edited by sdg1970; Jul 11th, 2018 at 23:46. |
Jul 12th, 2018, 12:42 | #13 |
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Here's a quick question - could a split recirc valve diaphragm throw an 0172 code and cause poor idle as well as crap boost etc???
Edited to add: I decided to get the Forge Motorsport valve after all as it seems a no brainer on second thoughts. 🙄 Last edited by sdg1970; Jul 12th, 2018 at 13:36. |
Jul 14th, 2018, 10:11 | #14 | |
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Aug 10th, 2018, 17:16 | #15 |
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In conclusion this turned out to be a split throttle body hose, right where the branch comes off to the idle control valve. Massive great big split not visible topside! I replaced all hoses with a D088 kit and it now boosts to max 16psi (unless the dreaded 0172 code appears). I'm sure the Forge Motorsport Diverter valve is helping that figure along nicely...
Last edited by sdg1970; Aug 10th, 2018 at 17:19. |
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Aug 15th, 2018, 22:41 | #16 |
C70 T5
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Thanks for the update, glad you got it sorted.
Would you be able to share a picture of the new hose in place?
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Aug 17th, 2018, 11:42 | #17 |
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Last edited by sdg1970; Aug 17th, 2018 at 12:08. |
Aug 18th, 2018, 22:18 | #18 | |
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Your p0172 code means it's running too rich, the computer will have been trying to trim back the long term fuelling till it couldn't do it anymore then it brings the light on and the fault code appears. MAFS are common culprit for this, they rarely completely fail but they do go out of calibration gradually. When they go faulty they can report back too much air or too little, one way makes the car go rich, the other makes it go lean. A sluggish switching o2 sensor can cause it as well amongst other things. If you have access to a diag computer, to check live readings this would help a lot.
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Aug 19th, 2018, 11:01 | #19 | |
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