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C30 / S40 & V50 '04-'12 / C70 '06-'13 General Forum for the P1-platform C30 / S40 / V50 / C70 models |
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The woe continuesViews : 392 Replies : 3Users Viewing This Thread : |
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Jul 25th, 2019, 23:06 | #1 |
New Member
Last Online: Nov 13th, 2023 19:30
Join Date: May 2018
Location: Aberdeenshire
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The woe continues
Okay so,
I have had my S40 (2008 2.0 diesel Lux) for 18 months, a few problems along the way, but I love my Volvo. About a couple of months ago I noticed an occasional and slight surging in power when accelerating hard in fifth and sixth. It became worse, I changed the fuel filter...I had noticed air in the clear fuel line and thought it might be the cause. It seemed to cure it, so I thought that I would fit the spare cone air filter I had lying around. Fitted okay and tried it out, I heard a lot of unpleasant induction noise and the performance seemed sluggish and dull. I returned the intake to original but the performance didn’t really come back. I obviously checked the intake system but found no problem. The car went into limp mode showing an underboost code. I cleared the code and it didn’t return. However it feels like the engine is not producing boost. I bought a WiFi obd2 interface to use with torque pro, but it only worked a couple of times...much to my annoyance, so I haven’t been able to check the boost conclusively. This is where the sore head begins. I will condense the story, but suffice to say, that I have trawled through almost every thread on every forum trying to find a solution. I have changed the inter cooler, visually checked the entire pressurised and vacuum sides of the engine system. I have replaced the vacuum solenoids. Replaced the MAP and MAF sensors. Checked the throttle position sensor. Used two treatments for sticking turbo vanes. Its a lot of info, but hopefully someone can make some suggestions. As I said initially, I know that there are other posts about very similar problems, but not many solutions. Thanks for any help. |
Jul 26th, 2019, 08:44 | #2 |
Senior Member
Last Online: Oct 30th, 2023 19:03
Join Date: May 2011
Location: Southampton
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Hi Mate
Sorry I can't help directly as I don't have experience with that engine, but I think the best thing you can do would be to get a diagnostic scan with VIDA - the proper Volvo diagnostic tool. It's reasonably priced from eBay or sellers on here. You might even be able to find a local member who can help. Even if there isn't a fault logged, VIDA has the ability to graph parameters as you drive - so you can spot things yourself. |
Jul 26th, 2019, 10:09 | #3 |
Junior Member
Last Online: Aug 30th, 2020 20:59
Join Date: Jul 2019
Location: northants
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ok this may or not help only just passed this onto a member on another forum but this cheap tool was able to read the map/maf pressure on a x type jag/ mazda/vauxhall so no idea on a volvo , but was able to find on the x type 2.0D that the actuator was sticking due to sticking vains giving low readings on the map sensor .
do a search though as there are cheaper outlets https://www.ebay.co.uk/itm/D900-Car-...0AAOSwqT9cigBZ another tool that works well on most cars is delphi /autocom if you have a spare laptop running winxp laying around or higher, delphi has so far done just about everything i have ever needed on many makers cars inc coding injectors /dpf regen and more cost is about £30-35 , just done a regen and eloys reset on my v50 1.6D |
Jul 26th, 2019, 14:03 | #4 |
New Member
Last Online: Nov 13th, 2023 19:30
Join Date: May 2018
Location: Aberdeenshire
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thanks for the replies guys.
I appreciate it. i am surprised that this fault hasnt been stickied in the forum, it seems so common, but few have given an explanation or solution. I have already contacted someone on the forum about VIDA. rxtian thanks for the info about it, my concern was that i would buy VIDA at £100 odd, and it wouldnt give me enough info to find the fault. i will look into the Delphi option again. cheers. |
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no boost, poor acceleration, surging |
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