2.0 FSI flatspot moving from standstill?

[MK5Sportline]

Hi all,

I've just pruchased a 2006 manual FSI Sportline (United Grey) and think its fantastic. The gearbox is wonderfully light and direct and the engine extremely smooth with a good midrange, though not overly endowed with low down torque...I know...thats what the diesels and turbos are for!

The car to me feels like its got a small flat spot really low down in the rev range at around 1500, only noticeable when you are taking off from stand still. You literally start to accelerate, even slowly, and then just for a franction of a second the power seems to go missing and then comes on again.

Is this just a characteristic of the engine (or engine management) or is something not quite right. The car has a perfect service history and literally just had its 75K service done by VW. I'm thinking of taking it to a VW to have checked out but wanted to see if anyone had any opinions first.

Thanks in anticipation

[scotty1991]

Engines just gutless, give it more revs

[Greg Roles]

If you're handy at all, I'd suggest you disconnect the battery for an hour ( quick on and off, don't let it spark ! ) as I believe this will reset the ECU back to learning made, and you have the chance to have it learn your driving style again.

Are there any tunes out there for the non turbo FSI at all people?

[ENERG1]

Great car the Sportsline i had an MY06, you might need just a little more

right foot strength.

Brilliant engine

Powerchips is a company which will remap the ecu, but there's not much

improvement over stock being a non-turbo engine.

Luke

[scotty1991]

Chipping wont give you enough power to justify the cost

[gerhard]

As you've just purchased it, do you know what fuel is in the tank?

The symptom you are describing could be 91 fuel in the tank instead of 98.

Double check also that the spark plugs were changed at 60,000k. If they weren't, they could also cause this problem.

[MK5Sportline]

The plugs were all changed at 60K and its just had its 75K done. All servicing done at a Melbourne VW Dealer. I just put a full tank of Vortex 98 in it but the behaviour was there even when I picked it up.

Other than this issue off standstill the engine seems brilliant.

The car still under warranty so I think I'll get an opinion from a VW Service Centre. I have one 5 minutes from where I work. I guess I should also drive another 2.0 FSI to see if it feels the same.

Thanks.

[iampivot]

I also experience this with my 2.0FSI. Someone at another forum said it might be a faulty low pressure fuel sensor, which has been troublesome in some GTIs.

VW Austral didn't seem to care about this when I took it up at my regular service, although an RCU reset improved it for about a week, before it went back to the old behaviour. They said the FSIs really seldom had problems with said fuel sensor, so unless there was an error code, they wouldn't investigate.

I think it's just a side effect of the ECU. You probably need to learn to live with it or get a TDI or GTI. But keep us posted if you manage to get it improved somehow. Talking to someone that knows the engine and has the time to test drive it would probably be an idea.

[blue_reality]

My wifes 2005 Sportline does exactly the same thing. Just as the clutch is out, power dips then picks up 1/2 a second later. Was very hard to get used to as my 07 GTI felt totally different. My wife doesn't really notice, and hasn't mentioned it but I notice it every time I drive it.

It's just something I've had to get used to. Not very excited about it to be honest so if you find out what it is (if it is an actual problem) then please let us know.

[blue_reality]

Powerchips is a company which will remap the ecu, but there's not much

improvement over stock being a non-turbo engine.

Luke

Chipping a non-turbo car (especially stock) will not give you an improvement that you will notice. 5% - 10% as an absolute maximum. Some of you may have seen the video I made about chipping. I filmed a section on non-turbos but when I found out that there are no real gains to be had I took it out of the video.

Link is here for those that want to see the process...

http://www.youtube.com/watch?v=mLvvxMCUo5E

[iampivot]

Did you try doing the 10 sec ECU restart?

1. Engine off, key in accessory position.
2. Wait about 30 seconds until the MFD goes out.
3. Press the accelerator pedal down fully for more than 10 seconds (about 13).
4. Release the pedal.
5. Turn the ignition off and take out the key.

[M4RK0]

This is really odd, I have an FSI 2008, and I don't have any problem about the rev's, not even when it's cold, maybe just a little bit after been stuck in the traffic, BUT after about 20mts everything it's normal,

Why the reset of the computer will help? what about the potentiometer?

Cheers!

Hi all,

I've just pruchased a 2006 manual FSI Sportline (United Grey) and think its fantastic. The gearbox is wonderfully light and direct and the engine extremely smooth with a good midrange, though not overly endowed with low down torque...I know...thats what the diesels and turbos are for!

The car to me feels like its got a small flat spot really low down in the rev range at around 1500, only noticeable when you are taking off from stand still. You literally start to accelerate, even slowly, and then just for a franction of a second the power seems to go missing and then comes on again.

Is this just a characteristic of the engine (or engine management) or is something not quite right. The car has a perfect service history and literally just had its 75K service done by VW. I'm thinking of taking it to a VW to have checked out but wanted to see if anyone had any opinions first.

Thanks in anticipation

[MK5Sportline]

(1) I tried the '10 second ECU reset' tonight and it may have made it slightly better...hard to tell really...certainly didnt solve the issue.
(2) I then started thrashing the car a bit, which I havent done yet, as I 've only been driving it to and from work in traffic. Things seemed to improve a bit more after that too!
(3) Once fuel tank is nearly empty I am going to fill up with BP Ultimate (I have Vortex 98 in it at the moment) and see if that make any difference.
(4) I think then I'll take it to a VW expert (I am in Melbourne and there's one I'd like to try in Burwood) and get them to VCDS it as well as go over the whole car just to let me know where its at. (The car was RACV tested but I really dont know how much they know and it passed roadworthy without issue).
(5) The car has done 75K and the clutch bites fairly high up so I dont know if this has any impact on the ECU, i.e. if when the clutch actually locks in a signal is sent that retards fuel flow or something and there is a mismatch at the moment.

[iampivot]

Any updates from your visit to the expert? Also, am curious if you'd test driven a brand new golf with the exact same engine to see if it exhibits the same behaviour?

[MK5Sportline]

I havent had a chance to have the car profesionally looked at yet. I can confirm that filling with BP Ultimate made no difference. The behaviour seems variable too, sometimes more obvious and sometimes less but maybe I am just driving around it. I need to do some testing so I can really try and determine exact conditions when its worst andalso drive a couple of other manual 2.0FSI...might try and do that later next week. As soon as I find anything out I'll post.