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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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Turbo System ProblemViews : 1212 Replies : 2Users Viewing This Thread : |
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Apr 22nd, 2010, 15:05 | #1 |
N00B
Last Online: Jul 22nd, 2012 19:46
Join Date: Jul 2009
Location: Sofia
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Turbo System Problem
Hello Fellow Forum Members and Volvo Enthusiasts ,
My name is Nick, this is my first post in this forum. I am an American living in Bulgaria and the reason why I am posting in the UK forum is because my English is much better than my Bulgarian , and because they don't have the diesel variants of Volvo's "over the pond" so I wasn't sure if the same problems and components apply to both gasoline and diesel engines. Let me start by saying that I have gone through all the relevant topics / posts here already, and have gleaned as much information as humanly possible before posting here. Having said that.... About a year and 3 months ago I purchased a 03/00 V70II (P82) 2.5TDi (D5252T - Audi). Although this is the first diesel car that I have owned, I have driven turbocharged cars before and understand the fundamental principles of forced induction systems as well as how the power output should feel. Right from the start I had a nagging suspiscion that the car is not delivering as much power as it should. Last week this suspiscion was verified when I drove a fellow forum members car (same model, year, engine, etc.) and I noticed a substantial difference in power delivery than my own car... I would say about 15 - 20% more starting at about 2200 - 2300 RPM. This immediately led me to believe that there is a problem somewhere in the turbocharging system of my car. Of everything that I read in other posts, here are the possible culprits: 1. Boost Pressure Sensor 2. Diesel Injection System Valve 3. EGR Valve 4. MAF Sensor 5. The propellor / spooler in the turbo 6. Pressure leak from a loose or split hose / pipe 7. Split intercooler. From what I have read and learned, I am temporarily ruling out the following (unless someone informs me that I am mistaken): 2. - Diagostics showed that all the injectors are spraying fuel within the specified range for proper fuel deilvery 4. - I have had no symptoms that would point to nearing the initiation of "limp home mode" 5. - I was told that if the prop is loose, I would be getting quite a bit of black smoke during startup and acceleration 7. - I read that a tell-tale sign of this would be an oil puddle under the front of the car. I have no oil leaks anywhere So, ultimately here are my questions: 1. Am I mistakenly ruling out one of the 4 things directly above and if so, which? 2. Aside from checking for pressure leak(s) from loose or split hose(s) / pipe(s), can the MAF, EGR and Boost pressure sensor be checked for functionality / integrity 3. Can any of the above-mentioned components (aside from the turbo which can be remanufactured at huge expense) be cleaned and/or repaired if need be to avoid having to purchase new, and is it recommended. 4. If no pressure leaks are found (I hear no noises indicaiting pressure loss) where should I begin? I sincerely thank you in advance for any advice you can provide
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