So just got a Skoda Octavia 2009 1.9tdi, 180,000 miles (ex-taxi - reguarly serviced).

 

After a week I've noticed that it lacks acceleration.

 

After roughly 4/5 miles, the engine does not exceed 2,500 rpm and although it will happily sit at 70mph getting there takes an age, and uphill sees a distinct lack of power and overtaking is a no-no due to my lack of confidence in the car.

 

After stopping and removing key, on start up the acceleration is back to what it should be IMO, I've tried both letting the car cool down and also starting again immediately - but same again after 4/5 miles - loses power.

 

I've only done 3 or 4 journeys over 15 miles or so in the week or so I've had it, and the Engine Management light has now came on, came on just has it lost power accelerating through the gears.

 

I then disconnected the MAF sensor and went on a run, same problem - fine until 4/5 miles.

 

Connecting the MAF sensor back again - same story fine for 4/5 miles.

 

I'm guessing that it probably done 80-90% city driving so exceeding 50mph would be few and far between.

 

 

Next course of action is the garage to get checked out, but if anyone can give me pointers as to anything I can check out, to ultimately save the garage time and me money

 

Sounds like its going into limp mode and could be due to clogged up turbo vanes. Best to get some member with vcds to do a scan for you to see it brings up any fault codes.

+1    +egr valve + inlet manifold   ---start at the fuel filter then the air filter and work toward the engine  

Sounds like its going into limp mode and could be due to clogged up turbo vanes. Best to get some member with vcds to do a scan for you to see it brings up any fault codes.

 

Have found a member offering this, http://www.briskoda.net/forums/user/25584-golfman/ any idea how I contact him ? Presumably as a new member PM's are not active for me.....?

After a scan the following faults were found ; 

 

Address 01: Engine        Labels: 03G-906-016-BKC.lbl
  Part No SW: 03G 906 021 TB    HW: 03G 906 021 AN
  Component: R4 1,9l EDC  000SG  2047  
  Revision: --H11---    Serial number:              
  Coding: 0000071
  Shop #: WSC 73430 790 00999
  VCID: 72E0CAD96D12F98E9D9-8027

2 Faults Found:
000564 - Boost Pressure Regulation 
              P0234 - 000 - Limit Exceeded (Overboost Condition)
            Freeze Frame:
                    Fault Status: 01110000
                    Fault Priority: 0
                    Fault Frequency: 12
                    Reset counter: 255
                    Mileage: 299303 km
                    Time Indication: 0
                    Date: 2054.14.31
                    Time: 23:05:18

            Freeze Frame:
                    RPM: 2604 /min
                    Speed: 92.0 km/h
                    Load: 80.0 %
                    Voltage: 14.21 V
                    Bin. Bits: 11000000
                    Absolute Pres.: 2029.8 mbar
                    Absolute Pres.: 2519.4 mbar

000258 - Mass Air Flow Sensor (G70) 
              P0102 - 000 - Signal too Low - Intermittent
            Freeze Frame:
                    Fault Status: 00110000
                    Fault Priority: 0
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 302556 km
                    Time Indication: 0
                    Date: 2056.14.03
                    Time: 11:07:09

            Freeze Frame:
                    RPM: 966 /min
                    Speed: 0.0 km/h
                    Load: 0.0 %
                    Duty Cycle: 64.7 %
                    Bin. Bits: 11000100
                    Mass Air / Rev.: 370.0 mg/str
                    Mass Air / Rev.: 0.0 mg/str

Readiness: 1 1 0 0 0 

 

After fitting a new Mass Air Flow Sensor and scanning/clearing the faults, the Engine Management light came on 2/3 days later, was driving fine with no noticeable faults.

 

Re-scanning showed only the 000564 - Boost Pressure Regulation  P0234 - 000 - Limit Exceeded (Overboost Condition) again.

 

Has been cleared and no Engine Management light now.....I'm guessing the fault will return, would the Boost Pressure Sensor be worth changing, or wasting my time ? Would that show up a dedicated fault code ?

 

Worth removing and cleaning EGR valve ? Any tips/photos/videos etc on best method..?

Edited 7 October, 201411 yr by andynicol

Based on that boost pressure limit fault code I think it's very likely that the turbo vanes are sticking.

Re. the MAF fault code, isn't that just because you ran it with the MAF unplugged for a while? I notice that the fault had only occurred once, probably when it was unplugged. You perhaps didn't need to have replaced the MAF at all.

sounds like sticky turbo vanes too, add some archoil turbo cleaner to the fuel to see if it improves things

 

http://www.oilem.com/turbo-cleaning-and-turbo-cleaners/

Based on that boost pressure limit fault code I think it's very likely that the turbo vanes are sticking.

Re. the MAF fault code, isn't that just because you ran it with the MAF unplugged for a while? I notice that the fault had only occurred once, probably when it was unplugged. You perhaps didn't need to have replaced the MAF at all.

 

Quite possibly, it appeared on the 1st scan, so I replaced it hoping that was the only fault.

 

I was/am looking at any way of solving the problem myself, or at least narrowing it down to reduce the garage time (& bill ultimately )

Have a search on here for Mr Muscle treatment of turbo vanes. It's not too difficult on the 1.9 engine apparently. Also the Archoil stuff that wiilydog mentions is reckoned to be good , although I've not tried it myself.

sounds like sticky turbo vanes too, add some archoil turbo cleaner to the fuel to see if it improves things

 

http://www.oilem.com/turbo-cleaning-and-turbo-cleaners/

 

Bardahl Turbo Cleaner sounds like the one I need to try ?

Have a search on here for Mr Muscle treatment of turbo vanes. It's not too difficult on the 1.9 engine apparently. Also the Archoil stuff that wiilydog mentions is reckoned to be good , although I've not tried it myself.

 

Don't think I'll attempt to tackle removing the Turbo myslef to clean  :no:   I'm okay with a set of spanners but I think a tad far 

Don't think I'll attempt to tackle removing the Turbo myslef to clean :no: I'm okay with a set of spanners but I think a tad far

AFAIK you don't need to remove the turbo on the 1.9 engine to do it, you undo the end of the EGR pipe and feed a tube down there to get the Mr Muscle into the turbo.

Have you checked the small bore vacuum hoses .hey can be brittle and leak at this age and can give all sorts of red herrings in faults diagnosis.  

Would a split hose in the oil breather pipe be the cause?

Have just noticed its split and about to replace it.

Doubtful that a oil breather pipe would cause the Turbo to over boost. I'd lay money on sticky turbo vanes.

 

Read up on the Mr Muscle fix and try it.

Was actually just away to attempt that following the thread by lofty79, was in the process of disconnecting the EGR valve and the pipe to the turbo isn't where his photos indicate.

Turned my attention to the opposite side and noticed the split pipe.

As I said earlier, I was about to follow the steps on this thread http://www.briskoda.net/forums/topic/243533-the-mr-muscle-vnt-turbo-treatment-thought-we-needed-a-guide-of-sorts/?hl=%20mr , and to cut a long story shorter, I have a different setup than the OP in that thread, no pipe under EGR leading to Turbo.

 

I then notice a 3/4 split in the oil breather pipe - replace temporary with a flexible hose with a view to replacing with genuine part once sourced.

 

Back to the Mr.Muscle I realise its a tad more complicated so bin that idea, phone garage to get car booked in and he cant take me this week.

 

On way home, possibly placebo effect but it seemed 'pokier', so I give it a bit of revs, short 6 mile journey home normally sees limp mode, tonight it was fine.

 

Head on a longer trip, 15 miles sticking at 70-75mph 3000rpm, all good and responsive, couple of overtakes taking speed up to 80mph and 3500-3800rpm.

 

About turn and head for home approx 20 miles, 15 of them sitting at 85mph 4000rpm, then 30-40mph for 5 miles or so til home.

 

This is the furthest Ive driven without limp mode kicking in, about 40 miles or so.

Edited 8 October, 201411 yr by andynicol

Problem, touch wood, is deffo sorted.

 

Only modification made has been replacing the oil breather pipe.

 

Another decent(ish) run tonight, round trip of around 60 miles, B roads, twisty bends and some long straights, gave the car a decent thrashing, no limp mode.

sounds like sticky turbo vanes too, add some archoil turbo cleaner to the fuel to see if it improves things

 

http://www.oilem.com/turbo-cleaning-and-turbo-cleaners/

 

I've actually ordered the Bardahl Turbo Cleaner from http://www.powerenhancer.co.uk/product.php/706/bardahl-diesel-turbo-cleaner 10% discount and next day delivery coming in at just under £70.

 

Then I found it here http://www.mister-auto.co.uk/en/turbo-additives/bardahl-4777_g900115_a9784777.html for only £52.40 !!

 

Called Power Enhancer and the beat the price and gave it to me for £50 delivered (next day).

 

 

Do I keep it for later or just empty the lot in next fill up ?

 

Planning on taking the car on holiday next week, Monday will see me doing roughly 300 miles, by end week will have covered 800+

Sounds promising. Fingers crossed!

 

Head on a longer trip, 15 miles sticking at 70-75mph 3000rpm, all good and responsive, couple of overtakes taking speed up to 80mph and 3500-3800rpm.

 

About turn and head for home approx 20 miles, 15 of them sitting at 85mph 4000rpm, then 30-40mph for 5 miles or so til home.

 

This is the furthest Ive driven without limp mode kicking in, about 40 miles or so.

 

What gear were you using? Those revs seem high.

I've actually ordered the Bardahl Turbo Cleaner from http://www.powerenhancer.co.uk/product.php/706/bardahl-diesel-turbo-cleaner 10% discount and next day delivery coming in at just under £70.

 

Then I found it here http://www.mister-auto.co.uk/en/turbo-additives/bardahl-4777_g900115_a9784777.html for only £52.40 !!

 

Called Power Enhancer and the beat the price and gave it to me for £50 delivered (next day).

 

 

Do I keep it for later or just empty the lot in next fill up ?

 

Planning on taking the car on holiday next week, Monday will see me doing roughly 300 miles, by end week will have covered 800+

I would you use it on the next fill since you are doing a long trip it makes perfect sense using it when the engine is fully warm, as long as restricting it to 3500 revs is not an issue until all the fuel is used.  It will give the turbo a good clean and then up follow up with regular use of fuel additive such as Archoil AR6200 to maintain cleanliness of the fuel system.

Sounds promising. Fingers crossed!

 

 

What gear were you using? Those revs seem high.

 

Outward left it in 4th (70-75mph 3000rpm), then up to 5th on way home (85mph 4000rpm).

I would you use it on the next fill since you are doing a long trip it makes perfect sense using it when the engine is fully warm, as long as restricting it to 3500 revs is not an issue until all the fuel is used.  It will give the turbo a good clean and then up follow up with regular use of fuel additive such as Archoil AR6200 to maintain cleanliness of the fuel system.