Rough idle loss of power..

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Rough idle loss of power..

Postby thewhiterider » Fri Sep 27, 2019 7:58 pm

OK so I posted a topic earlier about my turbo whistling, also it seems so ha e developed a rough idle.

I can't see the revs going up or down but I can hear the exhaust sound wavering up and down.. Like GrrRrrrrrRrrrrrRrrrrrRrrrr

So I took it to the garage.. They said they couldn't find a fault or hear the whistling but when I drove the car afterwards it seemed OK.. Until I put my foot down going onto the motorway it definitely feels like its lost power. Tested again on another road and same thing it just doesn't pull like it did. From being flung back in my seat to hardly at all.

Now the engine wavering is back.. But the whistling has stopped.. Has anyone any idea what this could be??
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I drive a: Scirocco R
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Re: Rough idle loss of power..

Postby L Swifty » Sat Oct 05, 2019 7:12 am

When I had a very rough idle on my Scirocco R it was the PCV valve, these are prone to fail all the time and VW have revised this part numerous times trying to make it last longer but still ends up failing. I have since had enough of replacing the PCV so I now run a Forge PCV delete plate, I have been running the delete plate for the past 3 years with no idle issues ever again.

I never had a whistling noise though, this could be the N80 evap purge valve which is also know to fail and does emit sounds when failing.

I would personally get both of these parts changed at the same time as they both fail on the R.
Last edited by L Swifty on Sat Oct 05, 2019 8:14 pm, edited 1 time in total.
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L Swifty
 
Posts: 27
Joined: Wed Mar 14, 2012 8:34 pm
I drive a: Scirocco R
In: Candy White
With a: Manual box
Options: ► Black Leather Seats
► VW RNS-510 Navigation System
► Talladega Wheels in Black

Mods:
► H&R 35mm Lowering Springs
► Evoms Cold Air Intake
► Goodridge Braided Brake Hoses
► Stage 1 Custom Remap - 324BHP
► Forge PCV Delete

Re: Rough idle loss of power..

Postby Cuprabob » Sat Oct 05, 2019 12:57 pm

L Swifty wrote:When I had a very rough idle on my Scirocco R it was the PVC valve, these are prone to fail all the time and VW have revised this part numerous times trying to make it last longer but still ends up failing. I have since had enough of replacing the PVC so I now run a Forge PVC delete plate, I have been running the delete plate for the past 3 years with no idle issues ever again.

I never had a whistling noise though, this could be the N80 evap purge valve which is also know to fail and does emit sounds when failing.

I would personally get both of these parts changed at the same time as they both fail on the R.


Just to avoid confusion, it's PCV and not PVC. OP might not get what he expected if they Google "PVC" :eek:
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Re: Rough idle loss of power..

Postby thewhiterider » Sat Oct 05, 2019 6:01 pm

Haha. Yeah I don't need any pvc!!

Cheers though any info at all will be a step closer to sorting it so I'll take it to a different garage this time and ask them to check that out!
thewhiterider
 
Posts: 32
Joined: Tue Aug 06, 2019 9:16 pm
I drive a: Scirocco R
In: Pure White
With a: DSG box

Re: Rough idle loss of power..

Postby L Swifty » Sat Oct 05, 2019 8:13 pm

Cuprabob wrote:
L Swifty wrote:When I had a very rough idle on my Scirocco R it was the PVC valve, these are prone to fail all the time and VW have revised this part numerous times trying to make it last longer but still ends up failing. I have since had enough of replacing the PVC so I now run a Forge PVC delete plate, I have been running the delete plate for the past 3 years with no idle issues ever again.

I never had a whistling noise though, this could be the N80 evap purge valve which is also know to fail and does emit sounds when failing.

I would personally get both of these parts changed at the same time as they both fail on the R.


Just to avoid confusion, it's PCV and not PVC. OP might not get what he expected if they Google "PVC" :eek:


Hahaha oooops my bad, must of been still waking up this morning :rolleyes: Will edit the post to avoid any confusion :lol:
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L Swifty
 
Posts: 27
Joined: Wed Mar 14, 2012 8:34 pm
I drive a: Scirocco R
In: Candy White
With a: Manual box
Options: ► Black Leather Seats
► VW RNS-510 Navigation System
► Talladega Wheels in Black

Mods:
► H&R 35mm Lowering Springs
► Evoms Cold Air Intake
► Goodridge Braided Brake Hoses
► Stage 1 Custom Remap - 324BHP
► Forge PCV Delete

Re: Rough idle loss of power..

Postby thewhiterider » Sun Oct 06, 2019 6:17 pm

Won't ask what you thinking about that morning ;)
thewhiterider
 
Posts: 32
Joined: Tue Aug 06, 2019 9:16 pm
I drive a: Scirocco R
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