erratic acceleration problem - need some advice

[manhota]

Hi all

Another problem.

this does not happen at idle or on acclerarion its only on keeping the speed/rpm at a level i,e doing 30 mph in 4th or 3rd gear between 1500 rpm and 2500 rpm is when it feels most, it just feels like the car jerks slightly rpm needle fluctuates up and down about 50 to 100 rpms max at the moment, its not making the engine jump out the bonnet or anything but i know its there and its just started to happen.

Theres zero mods on the car and its just had its major 40 k service at seat 1500 miles ago.

Its booked into midland vw for weds morning.

any ideas what this could be? DV valve/spark plugs/coilpack etc.

 

[Nath.]

Sounds like you could be in need of a modded EGR gasket. click me

 

[manhota]

Sounds like you could be in need of a modded EGR gasket. click me

my cars a petrol tfsi not a pd oil burner, i think its a failing coil pack and its only happening at steady speed not accleration i still have the power to boot it and all feels fine it just feels doing a steady 30 it misfires now and then.

 

[Marshall]

I don't know how bad yours is but my FR does a similar thing and always has.
If driving in traffic at say 30 mph on a very light throttle its like the fuel is being turned on and off again and again. No one else ever notices mine only the driver. Lots of cars do this its to do with no fuel being injected on overrun and I think the car can't decide if your on throttle or not.
I worked in a Fiat/Alfa garage for 15 years and had this complaint 100s of times and its normal/
You will know how bad yours is but mine is normal.
Kev

 

[gazprice79]

I have exactly the same problem with mine like, its getting to the point were im hating driving the car as it feels at times like it constantly running out of fuel and its not only the driver who can feel it in mine now. To top the situation off my car tonight developed a major misfire and loss of power ran VAGCOM on it when i got home and it said:


Saturday,26,March,2011,20:26:41:04643
VCDS Version: Release 10.6.3

Address 01: Engine Labels: 06F-907-115-AXX.lbl
Control Module Part Number: 1P0 907 115 C HW: 8P0 907 115 B
Component and/or Version: 2.0l R4/4V TFSI 0020
Software Coding: 0303000318070160
Work Shop Code: WSC 62016 476 95091
VCID: 2B7BD65AF383
4 Faults Found:

008801 - Boost Pressure Control Valve (N249): Mechanical Malfunction
P2261 - 008 - Implausible Signal - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 0
Fault Frequency: 1
Mileage: 76082 km
Time Indication: 0
Date: 2000.00.00
Time: 17:29:58

Freeze Frame:
RPM: 4910 /min
Load: 8.6 %
Speed: 91.0 km/h
Temperature: 65.0°C
Temperature: 16.0°C
Absolute Pres.: 1020.0 mbar
Voltage: 14.478 V

000566 - Manifold Pressure / Boost Sensor (G31): Implausible Signal
P0236 - 008 - Implausible Signal - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 0
Fault Frequency: 4
Mileage: 76082 km
Time Indication: 0
Date: 2000.00.00
Time: 17:30:13

Freeze Frame:
RPM: 828 /min
Load: 17.2 %
Speed: 0.0 km/h
Temperature: 78.0°C
Temperature: 19.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 14.224 V

000768 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 - Upper Limit Exceeded - MIL ON
Freeze Frame:
Fault Status: 11100001
Fault Priority: 0
Fault Frequency: 1
Mileage: 76273 km
Time Indication: 0
Date: 2000.00.00
Time: 19:52:08

Freeze Frame:
RPM: 2353 /min
Load: 35.7 %
Speed: 18.0 km/h
Temperature: 54.0°C
Temperature: 15.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 14.351 V

000772 - Cylinder 4: Misfire Detected
P0304 - 001 - Upper Limit Exceeded - MIL ON
Freeze Frame:
Fault Status: 11100001
Fault Priority: 0
Fault Frequency: 1
Mileage: 76273 km
Time Indication: 0
Date: 2000.00.00
Time: 19:52:08

Freeze Frame:
RPM: 2700 /min
Load: 46.3 %
Speed: 21.0 km/h
Temperature: 54.0°C
Temperature: 15.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 14.351 V


Readiness: 0000 0000

Car has had Revo stage 1 and a Forge twintake.

The car did the juddering before i had any mods.

Any comments or help would be greatly appreciated

Gaz

 

[manhota]

Gaz it looks like a coil pack on cylinder 4 would be your best bet atm, also has the diverter valve been changed it seems ur dv might be failing too.

 

[manhota]

i should have updated the fault on my car was coil packs on cyl 2 and 3.

 

[gazprice79]

When you replaced the coil pack on yours did it solve the juddering?

gaz

 

[manhota]

yes mate it did cyl 1 coil pack had already been changed, no 4 is still the old one, all juddering stopped but i think no 4 is on its way out as at idle its lumpy now and then.

 

[gazprice79]

Ah great next question and I'm really sorry to mither on a Sat night but can I replace them on my own or best to get done for me and where to get them from/cost?

Thanks again

Gaz

 

[manhota]

Mate ask as many question you need too.

Coil packs cost £25 to £30 each.

easy to replace. take the engine cover off by unclipping the MAF sensor then undo the clips to the air pipe on the left, and undo the screws or clip on the unduction mounting omn the front of thr cover towards the front grill.

cover now needs to be pulled up on each corner with some strength do a corner at a time it will pop off once off.

coils are attaached to the top of each spark plug simple undo clip and pull out and push the new ones on takes 10 mins to do. i will message you a link on the cover.

 

[manhota]

i hope the link is allowed, this is a good guide, its a mk5 gti cover but its the same as are covers.

http://www.golfmkv.net/blog/archives/16#

 

[manhota]

for the coil packs end of step 3 is all you need no further unless you want to change the spark plugs.

http://www.golfmkv.net/blog/archives/9#

 

[gazprice79]

Thanks alot I've had the juddering for nearly a year now and spent quite a few quid tryin to solve it and if this is the end of the problem I'll be well chuffed. Is it a specific part I need or can I get one from local Audi dealers out s3?

 

[manhota]

erm its the same engine so i cant see them being any different to be honest, i brought mine from midlandVW, im 99.99% sure the all the same on the 2.0 TFSI engines k03/k04 turbo.

Just ask for coil packs for a 2.0 TFSI engine mate you should be fine.

let me know if it cures it.

 

[manhota]

actually you might want to check your spark plugs just incase.

 

[manhota]

gaz you changed your DV?

 

[gazprice79]

i fitted a forge dv but im thinking of get a OEM updated model

 

[manhota]

dv should be fine i dont think you need the revision d.

 

[gazprice79]

thanks and now for the search to see if anywhere stocks these parts on a sunday or else waiting till tomorrow.

ill let you know how i get on

gaz