Vrs Octavia Mk2 Rough Idle

andrew-sankus · 23-06-2008, 18:58

Hi Guys,

My dads Vrs idle speed is up and down while the car is at a stand still. Skoda assist sent a patrolman out and he hooked up the laptop through the on board diagnostic port. Two errors came back as follows

1. PO171 16555 Injector bank 1 fuel system too lean.
2. PO100 Mass or volume air flow circuit malfunction.

there are no warning lights on at all, and the car still pulls like a freight train :-)

So l'm throwing myself yet again on your vast knowledge of Vrs Octavia's.

Any solutions would be most welcome, thanks again guys.

Andy

**VRStu** · 23-06-2008, 20:12

I'd think maybe the MAF has caused the P0171 or maybe one of the Lambda sensors is playing up.

Lummox · 23-06-2008, 21:06

It could well be doing both faults.

andrew-sankus · 24-06-2008, 01:03

Thanks Guys,

I'm booking the car into tomorrow,for a friday or a saturday slot, will post the results once l find out.

thanks again for all your help

Andy

Harry_vRS · 24-06-2008, 14:28

The Yanks with their MK5 Golfs seem to have problems with rough idling - it could be the PCV system. Let your car idle, if you remove the PCV breather pipe then block it off then if it stops being rough then thats the cause.

andrew-sankus · 24-06-2008, 21:33

That's the car book in for Friday after 13.00 as my dad is taking it straight over when he finishes work, will wait and see if anything transpires. Will keep you guys posted.

Thanks again.

Andy

andrew-sankus · 27-06-2008, 18:37

According to Skoda there is an air leak in one of the hoses somewhere in the engine, they would like the car back in for a full day to try and determine the exact location of the hose that has the leak in it.

will keep you guys posted.

Thanks

Andy

andrew-sankus · 05-07-2008, 23:13

Hi Guys,

Well Skoda had the car for a full day on Friday, turns out a new pressure valve is needed (keeps the fuel delivery pressurised) apparently. The Skoda tech was talking to my dad when he brought the car out the workshop. The part has been ordered we will be phoned once it's arrived and the silver beast can go back in once more.

Hopefully this will cure the problem.

Thanks
Andy

andrew-sankus · 26-07-2008, 18:21

Hi Guys,

The part that was ordered (which was on back order has now arrived) It is something to with the manifold, sketchy information supplied by service desk guy. Hopefully will be idling as sweet as a nut when the beast is on Friday.

**VRStu** · 26-07-2008, 18:26

Intake manifold runner possibly.

andrew-sankus · 26-07-2008, 19:10

Why let you guys know, once the beast has been sorted

andrew-sankus · 26-07-2008, 19:30

Hi Stu,

thanks for the reply but what does the intake manifold runner do exactly?

23-06-2008, 18:58	#1
andrew-sankus Briskodian Join Date: Nov 2007 Posts: 72 Thanks: 16 Thanked 2 Times in 2 Posts	Vrs Octavia Mk2 Rough Idle Hi Guys, My dads Vrs idle speed is up and down while the car is at a stand still. Skoda assist sent a patrolman out and he hooked up the laptop through the on board diagnostic port. Two errors came back as follows 1. PO171 16555 Injector bank 1 fuel system too lean. 2. PO100 Mass or volume air flow circuit malfunction. there are no warning lights on at all, and the car still pulls like a freight train :-) So l'm throwing myself yet again on your vast knowledge of Vrs Octavia's. Any solutions would be most welcome, thanks again guys. Andy Last edited by andrew-sankus; 24-06-2008 at 01:05.

23-06-2008, 20:12	#2
VRStu Briskoda Staff Join Date: Dec 2004 Location: Hampshire Posts: 20,439 Thanks: 116 Thanked 925 Times in 830 Posts	Re: Vrs Octavia Mk2 Rough Idle I'd think maybe the MAF has caused the P0171 or maybe one of the Lambda sensors is playing up. __________________ Stu - Freedom Pimp Stu's Websites - http://www.fabia-vrs.com & http://www.octavia-vrs.com Stu's Car - Hmm, Have a guess...... SWMBO's Car - 2008 Seat LEON TDi Stylance, Black Magic, Sports Pack, Rear Parking Sensors. Something for Weekend - A Patio

23-06-2008, 21:06	#3
Lummox U18 Automotive Join Date: Sep 2003 Location: Newport Pagnell Posts: 21,816 Thanks: 22 Thanked 658 Times in 554 Posts	Re: Vrs Octavia Mk2 Rough Idle It could well be doing both faults. __________________ Unit 18 Automotive Services now open Servicing, repairs, modifications you name it we do it. Cupra console bushes at special price, PM for a very competitive quote.

24-06-2008, 01:03	#4
andrew-sankus Briskodian Join Date: Nov 2007 Posts: 72 Thanks: 16 Thanked 2 Times in 2 Posts	Re: Vrs Octavia Mk2 Rough Idle Thanks Guys, I'm booking the car into tomorrow,for a friday or a saturday slot, will post the results once l find out. thanks again for all your help Andy

24-06-2008, 14:28	#5
Harry_vRS Briskodian Join Date: May 2005 Location: North Posts: 2,041 Thanks: 16 Thanked 41 Times in 33 Posts	Re: Vrs Octavia Mk2 Rough Idle The Yanks with their MK5 Golfs seem to have problems with rough idling - it could be the PCV system. Let your car idle, if you remove the PCV breather pipe then block it off then if it stops being rough then thats the cause. __________________ \| Silver Octavia v/RS Mk2 \| 18" Alloys \| Dual Zone Climatronic \| Xenons \| \| 273bhp 335lbft \|

24-06-2008, 21:33	#6
andrew-sankus Briskodian Join Date: Nov 2007 Posts: 72 Thanks: 16 Thanked 2 Times in 2 Posts	Re: Vrs Octavia Mk2 Rough Idle That's the car book in for Friday after 13.00 as my dad is taking it straight over when he finishes work, will wait and see if anything transpires. Will keep you guys posted. Thanks again. Andy

27-06-2008, 18:37	#7
andrew-sankus Briskodian Join Date: Nov 2007 Posts: 72 Thanks: 16 Thanked 2 Times in 2 Posts	Re: Vrs Octavia Mk2 Rough Idle According to Skoda there is an air leak in one of the hoses somewhere in the engine, they would like the car back in for a full day to try and determine the exact location of the hose that has the leak in it. will keep you guys posted. Thanks Andy

05-07-2008, 23:13	#8
andrew-sankus Briskodian Join Date: Nov 2007 Posts: 72 Thanks: 16 Thanked 2 Times in 2 Posts	Re: Vrs Octavia Mk2 Rough Idle Hi Guys, Well Skoda had the car for a full day on Friday, turns out a new pressure valve is needed (keeps the fuel delivery pressurised) apparently. The Skoda tech was talking to my dad when he brought the car out the workshop. The part has been ordered we will be phoned once it's arrived and the silver beast can go back in once more. Hopefully this will cure the problem. Thanks Andy

26-07-2008, 18:21	#9
andrew-sankus Briskodian Join Date: Nov 2007 Posts: 72 Thanks: 16 Thanked 2 Times in 2 Posts	Re: Vrs Octavia Mk2 Rough Idle Hi Guys, The part that was ordered (which was on back order has now arrived) It is something to with the manifold, sketchy information supplied by service desk guy. Hopefully will be idling as sweet as a nut when the beast is on Friday.

26-07-2008, 18:26	#10
VRStu Briskoda Staff Join Date: Dec 2004 Location: Hampshire Posts: 20,439 Thanks: 116 Thanked 925 Times in 830 Posts	Re: Vrs Octavia Mk2 Rough Idle Intake manifold runner possibly. __________________ Stu - Freedom Pimp Stu's Websites - http://www.fabia-vrs.com & http://www.octavia-vrs.com Stu's Car - Hmm, Have a guess...... SWMBO's Car - 2008 Seat LEON TDi Stylance, Black Magic, Sports Pack, Rear Parking Sensors. Something for Weekend - A Patio

26-07-2008, 19:10	#11
andrew-sankus Briskodian Join Date: Nov 2007 Posts: 72 Thanks: 16 Thanked 2 Times in 2 Posts	Re: Vrs Octavia Mk2 Rough Idle Why let you guys know, once the beast has been sorted

26-07-2008, 19:30	#12
andrew-sankus Briskodian Join Date: Nov 2007 Posts: 72 Thanks: 16 Thanked 2 Times in 2 Posts	Re: Vrs Octavia Mk2 Rough Idle Hi Stu, thanks for the reply but what does the intake manifold runner do exactly?

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