Intermittent rough/low idle

Lambman420

Lambman420

Registered User
Joined
Jun 11, 2018
Messages
38
Reaction score
2
Points
8
Location
Ipswich
very hard to describe the situation.
Owned the car a year now, always had a low idle around 640rpm sometimes when you sit in the car you can feel it shake a little, feels like a splutter/very slight misfire. Drives absolutely fine.
If I raise the Revs till about 750 I can’t feel the shake.
Some mornings I go to the car it’ll start and it sits at about 1100rpm for a couple minutes and returns to idle no idea why, seems to do it most of all when it’s sat in the sun. No real pattern to it might go weeks without doing it and then do it every day.
Twice I’ve gone to start the car and it’s spluttered and cut out, then you switch it on again and it’s fine.
I feel as if all these issues are connected and it feels like an ignition problem.

No errors codes
All coils/plugs replaced
Throttle body was cleaned even though
It was not dirty
Anyone have any suggestions?

Tfsi 1.4
 
Check your air intake for any leaks. Maybe a vacuum leak somewhere. I would especially check there is a good seal around the throttle body as it been cleaned.
 
Might be worth just taking then off, inspecting them and attaching back up tight.

Where abouts are you located
 
Because a scan can bring up codes, which might relate but not set off a check engine light
 
xkieron99x said:
Because a scan can bring up codes, which might relate but not set off a check engine light
Click to expand...
Ipswich mate, I’ll try and use my mates obd 11 tool when I can and see what’s what,
I have also replaced the roller ball thing
In the direct injection pump which sits on the camshaft and made
No difference just a bit quieter
 
Lambman420 said:
Ipswich mate, I’ll try and use my mates obd 11 tool when I can and see what’s what,
I have also replaced the roller ball thing
In the direct injection pump which sits on the camshaft and made
No difference just a bit quieter
Click to expand...
Ah if u was in the midlands you could used my vcds Kit. Also I’m guessing you are referring to your cam follower for the hpfp.
 
Have a look around your PCV vacuum hoses for any signs of oil leaks or splatter.
I had a hairline crack in one of mine, and although I didn't get any idle issues, under load it was leaking oil so it would have got worse over time and probably caused a poor idle in the long run.
 
xkieron99x said:
Ah if u was in the midlands you could used my vcds Kit. Also I’m guessing you are referring to your cam follower for the hpfp.
Click to expand...
My missus is from cov so I’m up there sometimes, and yes it’s the cam follwer that has been replaced.
@ Davey you mention oil I did have to top it up a litre the other week for the first time since I’ve owned it, it may be related
 
  • Like
Reactions: Daveyonthemove
Lambman420 said:
My missus is from cov so I’m up there sometimes, and yes it’s the cam follwer that has been replaced.
@ Davey you mention oil I did have to top it up a litre the other week for the first time since I’ve owned it, it may be related
Click to expand...
I’m in Leicester, so if you near any time, shoot me a message
 
Still got this issue and I’ve been doing a lot of research into carbon cleaning apparently the direct injection engines suffer bad from carbon clean therefore valves could not be searing properly hence needing a carbon clean?

I’ve been told a walnut blast would be needed.
All live data checked from sensors etc and seem all okay
 
Lambman420 said:
Still got this issue and I’ve been doing a lot of research into carbon cleaning apparently the direct injection engines suffer bad from carbon clean therefore valves could not be searing properly hence needing a carbon clean?

I’ve been told a walnut blast would be needed.
All live data checked from sensors etc and seem all okay
Click to expand...
Before you get a carbon clean I would check your mileage as there could be no point as it could have nothing to do with your problem , stick a genuine vcd's cable on it and go to module #1 engine and check your fuel rails , research ( ross- tech video's ) where it will give you an understanding and it could maybe put you on the road to recovery before you go to the last stop injectors , Btw RTech recondition them for a decent price so maybe if you go down that route look them up on FB or the net
 
Before trying that, it might be worth running some redex fuel system cleaner to help remove some despots, I’ve did this on mine and yes it ran better, especially if you use supermarket fuel.
 
You must log in or register to reply here.

Similar threads

3
Strange Idle/Rough - Intermittent
Replies
7
Views
1K
chris.vincent3
chris.vincent3
vali_mihaila17
A3 tfsi low misfire and rough start P0172
Replies
0
Views
429
vali_mihaila17
vali_mihaila17
MikesTractor
Intermittant MISFIRE?? Audi a3 1.4 TFSI 2010
Replies
4
Views
2K
samuelh_888
samuelh_888
SinkyA3
Tfsi Intermittent start problem
Replies
5
Views
9K
Retroman
Retroman
Lee1976pr
Rough idle.
Replies
15
Views
3K
Lee1976pr
Lee1976pr
Top
Back