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Excessive smoke, Help needed

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Old May 27th, 2016, 23:03   #1
daveyonthemove
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Question Excessive smoke, Help needed

V50 2.0D 136

Long story short, I had fault logged that pointed to Fuel pressure regulator, and after trial and error on the ordering side, I got the correct part delivered today and fitted.
The error code vanished after fitting, but the smoke persisted.
New error popped up.. Air Intake Temp sensor appeared to be the culprit, so a 80 min round trip to Euro car parts later and new part fitted, but smoke still persists and so does error code.
Another trip to Euro car parts and MAF collected, but issue still persists.

Old AIT sensor was smothered in oil so it would have needed removing, and throttle body was much dirtier than expected, but as I wasn't planning to remove this part I didn't have any cleaning products available, so this is a job for Monday.

Car is smoking (black/greyish) badly and economy is awful (300 miles to a tank if I dare to drive it).

Any suggestions on where to look for problems? Today has been expensive and stressful, and I'm no closer to finding the issue.
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Old May 28th, 2016, 07:38   #2
Bloders2
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id consider EGR valve?
im not that familiar with Volvos, but ive had a VW and a X Type which had EGR faults and no codes stored.

does it seem to drive ok
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Old May 28th, 2016, 07:47   #3
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Originally Posted by Bloders2 View Post
id consider EGR valve?
im not that familiar with Volvos, but ive had a VW and a X Type which had EGR faults and no codes stored.

does it seem to drive ok
Apart from the smoke, it drives OK.
EGR is on my to do list.
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Old May 28th, 2016, 08:04   #4
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My egr caused mine to smoke like hell, I fitted a blanking plate and it fixed it strait away. The plate is about 3 on eBay and can at the least act as easy diagnostics. Do you have a dpf?
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Old May 28th, 2016, 08:09   #5
daveyonthemove
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My egr caused mine to smoke like hell, I fitted a blanking plate and it fixed it strait away. The plate is about 3 on eBay and can at the least act as easy diagnostics. Do you have a dpf?
Does blocking the EGR raise a fault?
DPF was gutted last week.
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Old May 28th, 2016, 08:19   #6
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Hi

Quote:
DPF was gutted last week.
Could it have always been smoking but the DPF was stopping most of it before. Now it is removed it is visible. Could there have been a problem for a long time, I assume the DPF was blocked hence the removal.
Has the software been altered to delete the DPF sensors? Could it be trying to regenerate? Thinking it has a blocked DPF.

Iain

Last edited by IainG; May 28th, 2016 at 08:21.
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Old May 28th, 2016, 08:21   #7
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Try a blanking blanking plate, you can order them off EBay for a few quid. I was having starting issues, smoke under acceleration and pool fuel economy. I fitted the plate and it's all stopped. It's also worth cleaning your throttle body and chamfering the butterfly flap so it doesn't jam.

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Old May 28th, 2016, 08:35   #8
daveyonthemove
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Originally Posted by IainG View Post
Hi


Could it have always been smoking but the DPF was stopping most of it before. Now it is removed it is visible. Could there have been a problem for a long time, I assume the DPF was blocked hence the removal.
Has the software been altered to delete the DPF sensors? Could it be trying to regenerate? Thinking it has a blocked DPF.

Iain
The smoke was always there, and just as bad. I thought that it was the DPF being clogged that was causing the problem as it only seemed to blast out smoke as the Turbo kicked in, and it felt like it was blowing the DPF clean.
Sadly, that isn't the issue.
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Old May 28th, 2016, 08:38   #9
daveyonthemove
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Quote:
Originally Posted by The Thong View Post
Try a blanking blanking plate, you can order them off EBay for a few quid. I was having starting issues, smoke under acceleration and pool fuel economy. I fitted the plate and it's all stopped. It's also worth cleaning your throttle body and chamfering the butterfly flap so it doesn't jam.

TT
Just ordered a Blanking plate, but it won't be here till Tuesday.
How did you chamfer the butterfly flap? I'm already making plans to clean this out properly as it needs it.

Also, can anyone confirm that the Throttle body is held on with 3 T30 torx bolts?
Mine had one, and 2 10mm bolts, which I found odd and tricky to remove.
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Old May 28th, 2016, 08:47   #10
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Well it will put a fault on there for EGR circuit A low but I wouldnt worry about it as that fault wont put on a ECL. It may put the engine warning light on but seeing as you have had a dpf delete it should be okay!
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