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S80 '98-'06 / S60 '00-'09 / V70 & XC70 '00-'07 General Forum for the P2-platform S60 / V70 / XC70 / S80 models |
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Some 98 S80 T6 help needed please.Views : 774 Replies : 9Users Viewing This Thread : |
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Feb 11th, 2018, 20:12 | #1 |
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Some 98 S80 T6 help needed please.
Hi all I'm new here and for my first post I am unfortunately having to ask for some assistant from folks more knowledgeable with Volvo cars.
A little background on the situation as follows.... After a long period of Mercedes ownership, suspension units falling off while driving was the last straw. So off I went to get a Volvo, I like how the S80 looks and had no clue what I was buying ..... Except it was red and went brum fairly well. Turns out I purchased a 1998 S80 T6 SE 2.8 twin charged. There's a couple of oil leaks and from location I am fairly sure one is turbo return line and the other is caused but the pcv system being blocked (could be wrong though). Now I got the car for a very attractive price, it has the geartronic box that seems to work brilliantly but it has a random running issue and that's the main thing I need advice on. If you are cruising at 70mph or pootling around town it runs brilliantly. Give it the beans and that's a different story altogether. As soon as you get into the high rpm range on full power it starts to bang around and act like someone is turning the engine on and off. The traction control light doesn't seem to be on at that point and if you let off and floor it again it's fine. Previous owners were lovely people and seemed to think that it could have an iffy coilpack, apart from a slightly lumpy idle at cold there is nothing to point to this. But it has had all 6 plugs and 1 coilpack already recently. Anyone else had these symptoms or know what the fault is likely to be around these parts? My suspect list is TCV (most unlikely), coil pack or a sensor down somewhere ..... There is no engine light on and no messages on the dash so I'm a bit clueless where to start! I think I have attached a couple of snaps of the car but only if it worked properly. Thanks in advance for any help with this one |
Feb 12th, 2018, 15:05 | #2 |
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Situation report as follows... .
Took it and had codes read and cleared. They were as follows....... ECM 6806 Turbo charger TC control system flow fault ECM 644A camshaft reset valve ECM 980A Control module internal faulty Can anyone shed any light on these problems as it seems alright now cleared and no faults present?? |
Feb 12th, 2018, 20:53 | #3 |
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tcv as always just change it.
The wastegate pipes share the feed from the tcv and they can split. Theres 3 rubber hose lengths from the tcv to wastegate actuator. The vvt actuator is probably due a clean. Pulse is with 12v as it can get lazy. Did you get the freeze frame data for the codes?
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2001 S80 T6 2001 S60 2.0T 2001 V40 T4 2002 S60 T5 2004 S60 D5 163 |
Feb 13th, 2018, 22:51 | #4 |
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Thanks for the reply.....
I didn't get the freeze frame just asked he wrote out the codes for me. I have today been taking things to bits, inspecting and cleaning things up. There are things of note.... Top of engine under the covers was soaked in oil, ignition coil harness was also soaked. 2 of the coil pack connections on the loom are snapped. And despite the apparently clean vvt thing .... I removed and cleaned anyway. The result of today's fettle has been a much smoother idle and much, much more available boost. However it does still have a panic every so often but mostly running well. I have return hose gaskets arriving at Volvo for the turbo's tomorrow because they are leaking in the usual manner. Will I be able to get the broken connections or will it be a full loom? I do want to change the tcv but there are several that look the same with different part numbers including one used for egr control on a V40 so unsure what to buy..... Volvo no longer make them or supply them in the UK |
Feb 22nd, 2018, 21:39 | #5 |
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I think I have a TCV fault as getting the ECM 6806 fault code now. After some basic maintenance this is the one and only fault code recurring.
I can't think of another reason this code would show the way that it does and have also replaced all the vacuum lines for brand new. I have tried uploading the pictures of the fault code as it appears but it doesn't allow me to complete the upload. Fault code reads exactly as follows...... 6806 Boost pressure for exhaust-gas turbocharging value too low The symptoms of this are almost perfect idle, once rolling if you accelerate gently there is no issue other than poor mpg. As soon as you ask anything of the throttle .... 2800rpm or more, the engine immediately cuts and then comes back at FULL boost and repeats the cycle. Coil pack loom connectors are indeed available from Volvo directly, I have replaced 3 of the 6 so far. Also have replaced 1 faulty coil pack and a very badly fitted camshaft seal. Overall looking less like the Exxon Valdez and more like a car..... Just need to hope that this TCV makes the old tank run properly again when it arrives tomorrow. |
Mar 5th, 2018, 20:16 | #6 |
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Righty oh, I return without fixing some rather problematic issues!
I am still plagued with the daft hard cut issue and feel a bit like I'm chasing myself around in circles. I have replaced all 6 coils. Sorted the wires so nothing is shorting or arcing out. Fitted a new air intake temperature sensor and replaced every single vacuum pipe making sure to have no leaks. Also checked the entire system for air leaks (happy to report there are none). But.... This issue remains. I don't have a lumpy idle now but the car takes a little longer to start than I'm used to with my V6 Mercedes owned before the S80. Drive around in grandad shoes and all is mostly well. It pretty much behaves like a fairly quick 6 pot motor would be expected too. If you dare to go past half throttle, things get interesting, constant hard cuts at random points between 3.5k and 5k.... Also this makes using kickdown impossible and overtakes are out of the question. I have searched around for almost a week now for possible fixes but keep coming up with the same abandoned threads with no fix. Gut feeling is possible map sensor failure and I have already ruled out the fuel filter by fitting a new one. I have fitted 3 different brand new TCV units (all pierburg) and nothing changes. So that is one issue ruled out I guess |
Mar 7th, 2018, 18:48 | #7 |
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More people have looked at the car today and drawn a blank yet again!
Off to scrap in the morning with the feeling never to buy a Volvo ever again! Gone obviously are the glory days of the 740 and 240 alike |
Mar 7th, 2018, 20:14 | #8 |
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The S80 is a risky purchase, same for the complex XC90 or even the XC70 with it's AWD system. They were rather problematic when not properly cared for by previous owners. The advantage of the S80 is mostly more front leg room for taller drivers and more comfortable seats
The S60/V70 combo is a much safer buy. Again, there are cars that haven't been properly maintained and as any european vehicle they will give you trouble. No brand should be looked at as 'reliable and trouble free' in all conditions. It depends both on the previous and actual maintenance.
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Several Volvo Repair Videos https://www.youtube.com/playlist?lis...ECTts0FSVSOT_c Last edited by oragex; Mar 7th, 2018 at 20:18. |
Mar 7th, 2018, 20:40 | #9 |
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I think that sums it up excellently.
Certainly going to be far more cautious with my next purchase that's for sure. However I don't think that's going to be another Volvo after this experience. The old 740 would be great to own, but with their old age, is it going to be a bigger gamble? |
Mar 7th, 2018, 21:03 | #10 |
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Make sure you have genuine VOLVO spark plugs in it . are you sure the turbo control valve is working properly ?
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