I'm aware there are a few threads on here regarding power loss on the CEGA (I believe that's the engine I have - 2011 VRS 2.0 TDI CR) but I can't find anything which gives a definitive pointer as to what's happening with my car, so I'll list all off and hope you'll take mercy on me.

Problem 1: Occasionally misfires when cold.  Might be just the one cough or has been known to do it on and off for a few miles once or twice.  On one occasion I was coming gently out of a roundabout and it cut out and with the glowplug light flashing.

 

Problem 2: Power loss.  The car has been mapped (before my time and no dyno printout).  Has bags of power.  When running 100% it'll push you right back in your seat as the bulk of it comes in.  Pulls well round right through the upper rev range.

 

Then there are the occasions where the power feels like it comes in a lot softer - the car is still brisk but nowhere near has pokey as before.  Then you start to get what feel like flat spots around and about 4k rpm and, if on an autobahn (honest) and at higher speeds in 5th and 6th it'll feel like it's not keen to pick up any more speed.

 

In some ways it feels like a loss of boost.  I've had it where it's been driven at higher speeds and the flatness has kicked in when you've come off a motorway or whatever and the generally subdued feeling remains if you put your foot down in the lower gears.

 

I've also had it where it's done this kind of thing and I've cruised along gentle speeds for a while.  Stopped at a junction, pull away and it's been trying the spin the front wheels up in second more than ever.

 

It's been code scanned today.  Nothing.  I've seen a few posts which suggest one issue could be with the injectors.  Drive it sensibly and you get 55mpg out it, so still likely to be those?  I've seen mention of the DPF Exhaust Pressure Sensor. Do these ever suffer with EGR issues.

Thank you in advance for any pointers you can give as it's ruining an otherwise great car for me.

 

Anyone?

I'm changing the Exhaust Pressure sensor tomorrow whatever given how cheap and easy it is to do but fairly certain this is down to more than one issue.

Sounds like a have a similar issue to you but not as severe. I had one morning about 2 months ago where I started her cold and it chugged down the street with what I would describe as a misfire. I pulled over, turned her off and back on again - hasn't done that again since. The main issue is a lumpy idle with some hesitancy when I push the turbo in. Had glow plugs done at last service as was flagging up glow plugs on dash. Mine is low mileage 2010 on 77k, not been mapped and had 2 belts services now. I've run 2-3 tanks with decent injector cleaner and no change. Next on my list is injector loom but I haven't done a code read yet

 

I also have the power dip going over hills but that seems to be a common feature on these

 

On 11/07/2021 at 18:12, Scoo123 said:

Problem 2: Power loss.  The car has been mapped (before my time and no dyno printout).  Has bags of power.  When running 100% it'll push you right back in your seat as the bulk of it comes in.  Pulls well round right through the upper rev range.

 

Then there are the occasions where the power feels like it comes in a lot softer - the car is still brisk but nowhere near has pokey as before.  Then you start to get what feel like flat spots around and about 4k rpm and, if on an autobahn (honest) and at higher speeds in 5th and 6th it'll feel like it's not keen to pick up any more speed.

 

In some ways it feels like a loss of boost.

 

 

ive got a similar issue with power loss feels slow like theres no kick, still nippy but taking its time to get there, even my kids are complaining its slow,

got service booked tomorrow hoping its that,

 

sorry i was no help

keeping an eye on this thread

9 hours ago, munchkincoupe said:

Sounds like a have a similar issue to you but not as severe. I had one morning about 2 months ago where I started her cold and it chugged down the street with what I would describe as a misfire. I pulled over, turned her off and back on again - hasn't done that again since. The main issue is a lumpy idle with some hesitancy when I push the turbo in. Had glow plugs done at last service as was flagging up glow plugs on dash. Mine is low mileage 2010 on 77k, not been mapped and had 2 belts services now. I've run 2-3 tanks with decent injector cleaner and no change. Next on my list is injector loom but I haven't done a code read yet

 

I also have the power dip going over hills but that seems to be a common feature on these

Morning

We code scanned the car when it first did the random misfire - sometimes it's literally one 'cough' when it's been driven less than a mile from cold and it showed a voltage issue on injector number one.  Cleared that and no more have been generated since.  It may be a red herring as I stupidly didn't make a note of the date it was logged.

 

So anyway, we pondered injector loom at the time but as above, it's not shown it since on the rare occasion it's done that.  As an aside, have you looked into what's involved in changing that on the CRs, only we did and it doesn't appear to be a simple unplug and swap out like the PD one is.  My idle is always as it should be so unlikely to be the same thing as yours methinks.

 

Not had the power dip / loss thing specifically on hills - more power loss in specific circumstances as above.  Reading up elsewhere last night I found some reporting EGR issues on the CR.  Whatever, these are definitely more of an enigma than the good old 1.9 130s that I've had in various VAG cars in the past when it comes to tracing faults like this (and they had less of them in the first place...).   

8 hours ago, 111zah111 said:

 

 

ive got a similar issue with power loss feels slow like theres no kick, still nippy but taking its time to get there, even my kids are complaining its slow,

got service booked tomorrow hoping its that,

 

sorry i was no help

keeping an eye on this thread

Is yours the same all the time or just when the power loss kicks in?

 

S'ok, we can form a victim support group. 

 

I've just had another thought... do these suffer with MAF issues?  Fairly sure that wouldn't be causing the symptoms mines showing but it could be a factor.

3 hours ago, Scoo123 said:

Is yours the same all the time or just when the power loss kicks in?

 

S'ok, we can form a victim support group. 

 

I've just had another thought... do these suffer with MAF issues?  Fairly sure that wouldn't be causing the symptoms mines showing but it could be a factor.

 

yeah its all the time, it seems the low down power has disappeared, it started about 2-3 weeks ago, i had to fill up from tesco and since then its gone sluggish, ive filled up from back to shell  2 full tanks but it made no difference. just literally got the car serviced thats made no difference, it feels like somethings blocked so im gonna try dpf regen with vcds,

 

you can get maf problems but thats very rare,

have you unplugging your maf did that make a difference?

what code reader are you using?

 

 

Got a code reader on the way so will see if anything is stored

Hi guys got a issue with my car: MK2 OCTAVIA Diesel VRS

 

Had the car for just under a year, it slaped real quick when I purchased it then 5 months later there was a lack of power due to me only driving it around town.

So slapped it on the motorway & B-roads for a decent amount of time; Seem to comeback after that. (NO LIGHTS ON THE DASH)

 

But in the last 3 months been a bit iffy, One day I took it out it was sluggish so I planted my foot for a good while, then I came to a "red light" and it pulled like a train and for the rest of the drive.

Now it's just a lack of power.

 

• Took it to skoda and he said that there was no turbo spool. & End cap of this thing is gone (Refer to Image 1) & Turbo Pipe Collapsed. (Refer to Image 2)

 

 

• Had the turbo checked my local garage and he said he couldn't find an issue; got him to clean the turbo and replace the airfilter, I was able to hear the turbo spool easy now; it's better now, however it still not at the level of the "red light".

 

Need a little help.

Can you explain what "slaped" or "slapped" is supposed to mean in this context please?

 

I have been away from an English speaking environment for 16 years & think that it must be some new slang that I am unaware of.

 

Also I don't understand the references in bold to "red light" do you mean you stopped at a red traffic light and accelerated away fast when it changed to green or a red light came up on the dashboard?

Edited 14 July, 20214 yr by J.R.

To put into context:

 

Slaped/Slapped = meaning running really good, basically doing it's job correctly.

 

If you read the sentence. "red light" = When I came to a stop at the red light, then I accelerated away it was fine.

On 14/07/2021 at 17:49, munchkincoupe said:

Got a code reader on the way so will see if anything is stored

No error codes stored.............. I've done a tank of premium diesel and it does seem to be better. I did the previous 2 tanks with Forte Injector cleaner but this seems better now?!?!

On 13/07/2021 at 12:37, 111zah111 said:

 

yeah its all the time, it seems the low down power has disappeared, it started about 2-3 weeks ago, i had to fill up from tesco and since then its gone sluggish, ive filled up from back to shell  2 full tanks but it made no difference. just literally got the car serviced thats made no difference, it feels like somethings blocked so im gonna try dpf regen with vcds,

 

you can get maf problems but thats very rare,

have you unplugging your maf did that make a difference?

what code reader are you using?

 

 

sounds like you've got a split hose or even the turbo is failing.

 

does it take a while to get upto say 2.5Krpm and after that it's ok?  any excess noise?

1 hour ago, Gissin said:

sounds like you've got a split hose or even the turbo is failing.

 

does it take a while to get upto say 2.5Krpm and after that it's ok?  any excess noise?

 

it was taking a second or two longer  to get past 2.5k did a dpf regen made a big difference, however its still not 100% it felt like its choking but its kind of free now

i think you're right about a hose as i can hear  a vey faint hiss sound when on hard acceleration, ive also got a p2015 code, ive ordered a new inlet mani just waiting for that then going to do smoke/pressure test when i fit new manifold  also doing egr clean at same time

i hope its not turbo another expense i dont need

 

Update on mine…

 

Has done the one solitary ‘cough’ in the past few weeks.

 

Power wise it seems to be showing some consistency.

 

Boot it through the lower gears and it pulls like a train right through to the redline.

 

But if you do the same in 4th, as in where it’s taking longer for the car to pull through the rev range, it’ll normally get to just over 4k and the power will notably dip.

 

Once it’s done this, the power goes to its wafty place from about 3.5k onwards.

 

The car feels slightly less responsive as well after this. Flicking the key to reset everything changes nothing (unlike on the older 1.9 PDs where it got rid of limp mode).

 

Leave the car parked up and go back to it, all back to how it should be.

 

So… it appears prolonged running at higher revs under load is when this kicks in is the cause. Question is, why?

 

More exhaust gases than the DPF or a pressure sensor can deal with when under prolonged high load?

 

Injector(s), a sensor or something else electrical malfunctioning due to being unable to cope with being under prolonged load?

 

Turbo VNT - do they ever get sticky on these? EGR? 
 

Be nice to find out what it is. The new exhaust pressure sensor I ordered weeks ago is still sat in it’s wrapper so maybe changing that would be a good start… 

 

Hey all read the thread and IV had a few issues with mine.

It's a 2017 mk3 FL vrs

1st & 2nd pull really well at times but 3rd and 4th really boggy like the car has no turbo. 5th 6th seem just fine.

Also had the limp mode kick in 2 or 3 times it's only happens in 4th gear at 4krpm service booked but really have no idea what it could be.

Id be looking at the fuel pumps and fuel filters at this point.  Whats the in tank pump duty look like on vcds.

My 2015 Octavia mk3 vrs diesel, 97,000 miles has had an intermittent, momentary power loss for several months, described elsewhere as a 'hiccup', 'glitch', etc. at any speed, any gear, any time. No engine management light, so no fault codes, where to begin? I am no mechanic but began with terracleaning the fuel system which, 22 miles later, lit up the EML with the fault code for the Lamda sensor. Yippee, easy job, £95 for a Bosch lamda + £14 for the special 22mm socket. The old lamda WAS covered in soot. Replacing it brought back the 'proper' sharp vrs performance, the EML disappeared. ..but the hiccup persisted. What now? I read somewhere, I think on here, suggesting the crankshaft sensor so, at only £25 for a Febi one + £40 for fitting at a local 1-man gargage, I went for it. Since, in 4 journeys & 62 miles....no hiccup!! Sorry that I couldn't find the suggestion again but, whoever it was, THANKYOU!👍