Diagnosing VNT Turbo Faults

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RECOMMENDED
Original Vacuum VNT Testing video • How To Test a Turbo VN...

[@sirobb]

Thank Yous / Tips / Donations www.paypal.me/SiRobb/ Useful tools and other products of interest in my Amazon Store Front www.amazon.co.uk/shop/sirobb? *RECOMMENDED* Original Vacuum VNT Testing video kzbin.info/www/bejne/hKnQm4WXntaYd80

[@andrisw7380]

hi i need your personal coment... please write me some.watsup adress or messenger to find you to send video with question about d5 engine

[@vorlich1]

I’ve been watching a lot of your videos since buying my 2006 xc70 d5 and have learned a lot and gained the confidence to change my aux belt and tensioner. ABS rings are next up this morning. I’m not aware of having any VNT issues, but for someone who doesn’t really have a solid understanding of how engines work, I’m picking up little bits of knowledge with every video I watch. Thanks.

[@aavisokotlacnociscenje1922]

Hey man, I want to say thank you so much for these videos. I been able to do everything on my xc90 with ease thanks to your videos. You cut so much figuring out what and how. I really appreciate it mate.

[@sirobb]

That's great to hear and thank you for the comment.

[@mattkirk8404]

Very helpful, full of information. 👍

[@leumasen156]

Excellent information as always. I have owned my V70 D5 AWD Auto for over 1,5 year and driven over 35000km I think, with almost 35k Swedish Miles behind. Your videos have helped me a lot on this car, doing all the repairs myself as I have done on my previous 3 Volvos. Though I've had a couple of annoying problems with the car since I first got it. Took me a year to find out that it was the lower right engine mount under the crank pulley was separated, led to an annoying tire sound (and wear) every left turn. And there is something with the boost preassure which I havn't solved yet. Hesitation, delay just when you would expect the boost to begin smooth, it kicks in instead. Have had the code ecm 6805 wich puts the car in limp home and engine service required message. (Svenska: Motorservice erfodras). Restart the car and it's back on "normal". When engine cold and accelerating from standing still, this problem happen to completely disappear and the car runs really nice. Worth mention, AWD models have the space occupied underneath the turbo, unfortunately! Thanks

[@leumasen156]

Hi, I've made some further investigation on my car. Atmospheric sensor 970hpa idling, Seems Ok I guess? Intake manifold pressure idling, somewhere between 800-850 hpa. Pulling a mild vakuum doesn't it? Edit: Had a pressure on almost 2000hpa when full accelerating, varm engine. Good and as I expected.

[@leumasen156]

Hi, am a bit thrilled as I finally made progress on this one. I purchased a CRC Carb & EGR cleaner. Gave it a careful treatment by spraying it into the intake hose on the Lmm and then reving the engine. Didn't help at all I think. Instead I took off the intake hose on the turbo, and with the can upside down (can works in every direction) I put the small pipe into the turbo and sprayed. Let it sit for a while before driving. After two treatments and some driving I can say without doubt that it helped a lot! Accelerating is more controlled and smooth. Still a tiny bit of "kick" as the vanes is not entirely free, should help by spraying more and driving. This seem to have improved the travel of the vnt actuator arm, as it is a big difference at low revs.

[@ifitsgotwheels1100]

Amazing video, thank you. My issue is with the line connected from the solenoid the VNT arm drops all the way down and the car shuts off. Disconnect the vac line, the car idles fine with no boost.

[@MrYOTOSTAR]

I have the exact same symptoms, only sometimes the engine has no power on lower rpms but then suddenly the boost kicks in. I tried a turbo cleaner diesel additive and it seems to have worked nice

[@crawfordniche]

Sir, do you simply use the standard "canned" PIDs, or do you have any custom PIDs you've stumbled across?

[@seesikopter]

Do you know what could cause my turbo to die at 1400 rpm? It just whistles normally till 1400 and you can hear how it just shuts off and it won’t come back till I restart the engine

[@james6901]

Doing a great job ,,thank you.

[@davidbrowne1588]

Hi Simon another Great video But you do need to tell people that the 30+ PSI you are seeing is including 14.7 atmosphere pressure , or all with car problems will think they have a bad turbo, Thanks Dave

[@sirobb]

Genuine question. Have you watched the video? 1:07 I show the caption saying "The maximum boost pressure is 2090 hPa in absolute pressure. 2:50 I say total pressure from the MAP. As you know, the MAP is an absolute pressure sensor. 5:14 I show two different gauges. One is absolute one is boost. 7:20 different gauges are shown again to illustrate what to look for.

[@garywalker3818]

good blog si gary from crewe

[@thebiker2655]

Any videos on a subframe removal/clutch replacement.

[@leonhill6800]

Hi, Fantastic video and Great tips. You made it in a very easy to understand and follow way. Can you tell me which OBD device and which app you were using in this video, Please?. I followed your links to your Amazon site and there are two OBD's listed (well as far as I could see anyway) and there are so many apps to choose from esp with one, it made my mind boggle???. Also, I have a Saab 93 and a traction control esp warning has illuminated. Would this dongle and app tell me which sensor or corner is playing up? (eg:- front nearside ABS no signal. Or something like that). If can help with any info I would be very grateful indeed. Many Thanks, Leon. :-) Ps. where did you get that very handy wheel centre removal/sucker tool from. That is defo a toolbox must have to??!!.

[@rhiantaylor3446]

Would you ever consider the Mr. Muscle( i.e. chemical cleaner) approach to cleaning out sticking VNT vanes ?

[@sirobb]

I haven't but if you see the comment by Frederick Thoms, you'll see that he had great results.

[@MarkDaviesThailand]

Hi Simon. Many thanks that cleared up a lot in regard to how a variable nozzle turbo charger operates. I like the ergonomics of your diagnostic tool but when I went to Amazon on your link it showed two. Which one are you using in your video please?

[@sirobb]

The two types are Bluetooth and WiFi and I only use the V1.5 version. I'm on Android so use the Bluetooth mini version with the Torque Pro app. IOS users need the WiFi version with a suitable app from the Apple Store.

[@MarkDaviesThailand]

@@sirobb Thank you very much Simon.

[@johnmcguinness7116]

U ever changed turbo sirobb may be buying s60 with blown turbo

[@thomasvearing935]

I’ve got a riddle three mechanics haven’t been able to solve. Twin turbo navara, high pressure turbo stays in open position after a run upto 80. Come to a stop and no boost pressure until second turbo at 2400rpm. Battery disconnect resets and does it again.

[@maximilianschmidt1443]

This helps a lot. My friend owns a 2004 V70 D5 with 596.000km on the clock and he has turbo issues. We checked all the tubes und mounts for leaks and found none. Found a faulty TCV behind the intake hose and now it responds better, but still the real boost only kicks in at 3000rpm and tends to ooverboost a bit. The VNT mechanism works as long as we use our little manual vacuum pump. After fixing the TCV we now have a constant ticking noise from the engine. My guess is now, that its either the turbo itself or a faulty vacuum pump (also the source of the noise). All the vacuum hoses are pretty oily on the inside, could a defective vacuum pump be the cause?

[@sirobb]

Use a vacuum tester directly on the vacuum pump as suggested in the video link I provided in your other comment. That will first of all tell if the pump is producing enough constant and stable vacuum. Also, with everything connected, view the VNT action whilst revving as shown in this video. Regardless of the vacuum reading from the pump, if the pump is noisy then it may well need replacing but if it is producing full vacuum and there is still lack of boost, either the VNT is sticking or boost is being lost through a leak in the intake system or the MAF or MAP or fuel pressure readings aren't correct. Low fuel pressure could be just a clogged filter. You have to test everything carefully and not just change parts by guessing.

[@kevinhancock4064]

Interesting. I have had lots of work done turbo kit (genuine ) head gasket lifters rockers intake clean of carbon cams the lot . Tickover is sweet as ot shouod be . I get (had it before the work ) a mooing noise . I jeep coming back to the turbo solenoid years the turbo was sorted but not the solenoid . I have power . I think it could be a smidge more responsive..it car does a regen it's pretty quick . 2 sensors were replaced a week after the work was done it's not a volvo (but I loke volvos ) .its a mazda it's mostly noticeable at lower speeds . Annoying noise indeed Thank you

[@madcarew.3256]

Hiya Rob...Have used yr 02 v70 d5 vids as a ref. great stuff . Cleaning engine thought remove oil cap..yup.pop.pop pop. rear engine mount. Followed vid for meyle part.. Thanks!! Clamped hose to rear mount.Pop stopped. Due to lack of work due to the obvious can't buy mount immediately.Car not covering any distance lately. What's yr views on no vac rear mount for a short while? Thanks again. Cheers (Tony)

[@sirobb]

I can't recommend and say that it will be fine leaving it as it is so just change it as soon as finances allow.

[@carpetjean8301]

Hello Sirobb, Sorry for my English, this is not my native language! Could you tell me the procedure to get the turbo out of the car as smooth as possible? Thank you very much for your answer.

[@ricrc5643]

Many thanks for all answers! I'm very happy!

[@alexnunn-thompson223]

Hi si. Amazing step by step guides making my life much easier. I'm looking for a vida setup to help chase away some black smokey issues and diagnose an abs fault. Do you advertise yours anywhere? Cheers Alex

[@sirobb]

@Alex Nunn-thompson Did you receive my reply? KZbin comment notifications can be unreliable.

[@alexnunn-thompson223]

@@sirobb hi si. Yeah thanks mate. Had the codes read today for the abs and its insufficient voltage to abs pump but it's intermittent and does come on right away. Hoping it's a bad connection somewhere not a new pump.

[@sirobb]

@Alex nunn-Thompson No problem Alex. Don't forget that Vida would give you the Volvo code and an explanation of the fault and the possible causes and fixes. Vida also contains the workshop manual and technical data/voltages for the braking system components Not dead money either as you use it for as long as you need then sell it on when you're done. You have options so good luck with the fix and if you want one of my diagnostic solutions, just let me know.

[@CoolMusicToMyEars]

I always look for vacuum problems that can send error codes like P0102 throwing all the system off, engine mounts being the first port of call, I use Wynns injection clean fuel additive to 40 litres of fuel that helps clean injectors try doing say at least a long run 15 miles & notice the difference,

[@nasokas]

What diagnostic tools are you using. I see that its android based, what is the app and OBD connection? Thanks.

[@sirobb]

Torque Pro app. ELM327 V1. 5 Bluetooth dongle

[@bitzaboat]

Hi Simon, a great description of my problem! Have you tackled the sticking vain problems yet?

[@sirobb]

Not yet. As you can see, the vanes free up pretty quickly so as long as I'm careful when the engine is cold, you wouldn't know there's a problem.

[@bitzaboat]

@@sirobb Thanks for coming back to me. I was going to remove the turbo, but I have seen a few people say it come be cleaned in situ. What would you recommend. Mine is 2002 220k miles so similar to yours.

[@sirobb]

@@bitzaboat If you haven't already, definitely use a vacuum tester directly on the actuator to exercise the vanes. Video link is in the top pinned comment above.

[@bitzaboat]

@@sirobb Hi Si, yes I tested that first as per your vid and got a similar reading and it was holding just over 20. The arm however was only moving 5-10mm max with the engine running at various revs up to 3000 as it wont rev past that. But occasionally when on the road the boost comes in big time so it must be overboosting in those cases.

[@bitzaboat]

@@sirobb I went ahead with cleaning the turbo using www.opieoils.co.uk/p-92010-power-maxed-diesel-turbo-cleaner-kit.aspx but I still have the same symptoms 😕 I do have Vida but not sure if using it apart from the basics.

[@homesteadandvideo]

Hi there , my 2002 v70 d5 ceeps showing "engine service reuired"msg and fault code 045 in the dim . It runs in lean mode but no engine light , any suggestions Simon . Thanks in advance .

[@sirobb]

Until you read the car with a proper code reader and ideally with Dice and Vida, you can only guess unfortunately. The DIM number codes cannot be trusted to diagnose faults.

[@homesteadandvideo]

@@sirobb Ok , thanks buddy .

[@kanesfist9895]

@sirobb I suspect I have a VAC pump leak and noted I am getting the oil cap popping .... You reckon a leaking pump would also account for this popping ?

[@sirobb]

Yes it could but so could several things so best to test and not guess or assume. I have a vacuum pump testing video in my list.

[@kanesfist9895]

@@sirobb already watched those ages ago Si. ...... your channel is my first port of call for all things xc90 .... I have an xc90 2007 ...... I dont think you tested the actual pump did you ? Is it a case of just removing the VAC pump pipe ..... Connect the test pump and seeing if it holds vacuum ?

[@sirobb]

@@kanesfist9895 I tested the pump directly. Maybe you haven't seen it. kzbin.info/www/bejne/Y53KinSJaKyin6c

[@kanesfist9895]

@@sirobb just found it .... Another great video .... So I have tested it and it holds VAC steady at about 25 .... Also front mount holds but I think the rear mount is gunned .... Didn't register anything so either it's the pipe or mount itself .... As a test I did disconnect the rear and covered the tube .... The popping did reduce but did not disappear ...... Anywhere else to test ? I have oil residue just below the VAC pump so I was expecting that being the issue but if it's holding VAC could it still leak ?

[@homesteadandvideo]

Great video , you stil got the volvo ?

[@sirobb]

Thank you and Yes. 😊👍🏾

[@johnbickle4654]

Hi , i have the chance of buying a low mileage volvo c30 t5 from a neighbour the car was left idle for a year battery died and would not start they had the a.a out who said the ecu has lost it's coding and would need to go into volvo for coding , , would you happen to know if this coding could be done with vida software?

[@sirobb]

It's a software download at a dealer or specialist with access to the Volvo servers.

[@johnbickle4654]

ok thanks.

[@JnnNkc2205]

I have a new turbo on my car. Its Ford Focus 1.6 tdci 90 hp,2010. I have overboost condition with DTC P0234-60. I changed boost control solenoid. Also tried with other MAP sensor. Still the same DTC comes again. I see that actutor rod moves freely. I dont know what else i could check. Any ideas?

[@sirobb]

Viewing the actual boost figure with live data is a good start. Also what is the MAP reading with just ignition on, at idle and the maximum figure out on the road. Also don't change parts without testing as most can be eliminated easily with cheap equipment.

[@JnnNkc2205]

@@sirobb I have Forscan. MAP sensor on idle 105kpa,on full throtle about 248kpa. VGT duty cycle goes on idle from 61-67%,on full throtle it goes down to 35-45%.

[@sirobb]

@Jnn Nkc Do you have an official workshop manual or data from the same engine from say a Ford forum? The idle pressure is fine but the pressure at full throttle would be high on some cars. It may be correct for yours though. Have you viewed the VNT operation when all connected up and revving the engine like in this video? If it's sticking even slightly at the wrong time, boost could rise above the programmed maximum.

[@JnnNkc2205]

@@sirobb I dont have workshop manual. I was watching actuator rod moves. It moves quait smootly. Also when i disconect MAP sensor car works much calm then with MAP sensor conected.

[@sirobb]

@@JnnNkc2205 What the EGR? Is that coked up or working correctly? Also MAF and fuel pressure at idle and maximum..... Something is going to be out.

[@adriansmeds4800]

Hi! Ive been trying to fix my P0244 fault code that causes limpmode on my 2002 V70 D5 Euro 3. The fault code came on when it went into limpmode but after replacing the turbo inlet pipe, boost solenoid and blocking off the engine mount vacuum hose now the fault code is always on. Please help!

[@sirobb]

Have you done the tests and observations shown in this video and the pinned comment?

[@adriansmeds4800]

@@sirobb Yes.

[@sirobb]

Did the actuator have full travel in both directions? What was your map pressure at idle and the maximum achieved MAP pressure reading?

[@adriansmeds4800]

@@sirobb Dont know exactly if full travel but it moved quite a lot. Idle pressure: 0.06Bar Max pressure 2.8Bar

[@sirobb]

You have massive overboost so no wonder you're getting codes. You have to be certain your entire vacuum and boost system pipework is air leak free for correct VNT operation. Also check the large diameter ribbed elbow shaped pipe for collapsing or tears and the intercooler for oil residue and distortion.

[@tripshobbies2810]

Hi Rob, wondering if you could share some advice. I had this anti-skid service problem and have installed a new used yaw sensor from another car that was working. Now it still has the same problem but it says the system not calibrated. If you can give me a contact and help me through this process, name you're price and I'll wire it to you. Thanks Simon.

[@sirobb]

What diagnostics equipment do you have access to and what is the Volvo model and model year?

[@tripshobbies2810]

@@sirobb basic mid range scan tool Launch. Its a 2003 xc90

[@sirobb]

You'll need to do a calibration of the Yaw sensor. I only use Vida on Volvos so you'd need to check if your tool can carry out such a procedure. If yours can't, I can provide the tool for £100 delivered in the UK and that includes the software. You would just need a suitably specced laptop to run the Vida software.

[@tripshobbies2810]

@@sirobb I'm in Slovenia. So its quite a distance. What tool can do the job, I can check around here.

[@sirobb]

You need a Dice or VCX tool and Vida software. I can send one to Slovenia for £115GBP