Flat spot when accelerating between 3000 and 4000 revs.

[1.8T6LIbiza]

Hi guys and girls.
Firstly I want to apologies if I have done this wrong (first time posting)

I have a Seat Ibiza 1.8T.

My car has started to develop the following.

When accelerating (In any gear) between 3000 and 4000 revs my revs will drop then build up again.

I have checked the following and all are okay:

1) Clutch has been checked and feedback was fine
2) Gearbox is fine
3) Sparks are fine
4) Intake is fine


I have no error coming up but there is a problem.

Anyone know what could be causing this?
The website won’t let me upload the video, so here is a picture of my Ibiza.

Thanks,

 

[tony20]

Have a look at my video on this thread, is it similar to what is happening here?

Seat Cupra 280 - Juddering issue?

Hi, Please take a look at this video of an issue i've been having with my 65 Seat cupra 280 st. Sometimes it just starts playing up.. no idea what the issue is as it comes and goes with no warning lights / errors.. My garage seems to think it's either spark plugs or coil pack either way...

www.seatcupra.net

 

[1.8T6LIbiza]

Have a look at my video on this thread, is it similar to what is happening here?

Seat Cupra 280 - Juddering issue?

Hi, Please take a look at this video of an issue i've been having with my 65 Seat cupra 280 st. Sometimes it just starts playing up.. no idea what the issue is as it comes and goes with no warning lights / errors.. My garage seems to think it's either spark plugs or coil pack either way...

www.seatcupra.net

I don't think so.
It is hard to judge by watching the video without looking at the rev counter.

It goes like this.

I am in any gear > revs build up fine until I reach 3500 > this is when it will suddenly jump up over 4000 then drop down again and then act normal.

Do you reken a coil pack could create an issue like this?

Thanks,

 

[tony20]

Yes mate, that's exactly what was happening on mine.. the only difference with mine being the coilpack was sometimes it wouldn't go above 4000 revs and I'd have to back off the throttle

 

[1.8T6LIbiza]

Yes mate, that's exactly what was happening on mine.. the only difference with mine being the coilpack was sometimes it wouldn't go above 4000 revs and I'd have to back off the throttle

Hmm okay.
This is what is happening:

- YouTube

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www.youtube.com

 

[tony20]

looks like a misfire to be honest mate subtle but it's there.. it's almost as if it hesitates - re calculates and keeps going

 

[1.8T6LIbiza]

looks like a misfire to be honest mate subtle but it's there.. it's almost as if it hesitates - re calculates and keeps going

Thanks for your help mate
It is just annoying because no old codes are saved and no EML present so it is a stab in the dark.

Would you suggest upgrading to the R8 coil packs or just remain on OEM, or what would you suggest?
Also on top end which coil would that be? or just replace them all?

Sorry for all of the stupid questions, never had any coil problems haha.

Thanks

 

[tony20]

I had the same problem the car didn't throw up any codes.. because it compensates for the misfire it stays within safe range limits so it doesn't throw up a code.. it's stupid really. The options are either swap out 1 coil pack at a time (test drive each time) or just repalce them all and save any near future repeats general rule is if ones gone they will all start going so best to replace them all. I would to save money buy one a decent brand OEM one and go through cylinders 1-4 and test drive between each one

 

[1.8T6LIbiza]

I had the same problem the car didn't throw up any codes.. because it compensates for the misfire it stays within safe range limits so it doesn't throw up a code.. it's stupid really. The options are either swap out 1 coil pack at a time (test drive each time) or just repalce them all and save any near future repeats general rule is if ones gone they will all start going so best to replace them all. I would to save money buy one a decent brand OEM one and go through cylinders 1-4 and test drive between each one

I think I will just replace them all.
Have you seen the current fuel prices O.0 will be cheaper to replace all and test drive, rather than test drive after each coil haha.

She is moddified and only drinks v-power.

Thank you for all of your help dude.
I will have a gander to see which one to get.

 

[tony20]

haha I feel you good luck and let us know how you get on

 

[mty12345]

Hmm okay.
This is what is happening:

- YouTube

Enjoy the videos and music that you love, upload original content and share it all with friends, family and the world on YouTube.

www.youtube.com

looks like the clutch slips then bites again to me.

 

[tony20]

I recently experienced clutch slip similiar to this -

Instantly got a new clutch fitted and saved the flywheel

I think if it was clutch slip, he would be experiencing it alot worse than this, it bites back so fast and doesn't judder, that said because it's happening in any gear and not just high gears I would suspect a misfire.. I would be surprised if it was the clutch slipping.