new member with '02 octavia vrs diagnostic problem

phillip · 31-01-2007, 18:08

Hello people, just found this website, having owned my '51 Octavia vRS for 3 years now.

I have had a lot of problems with the engine management light coming on, and have had it checked by a local garage a few times now, and the light reset, but they are no experts in diagnostics, and didn't really know what to suggest other than taking it to a local specialist, who will no-doubt charge a fortune to analyse it, and even more to supposedly fix it, but me being a tight git, I don't want to fork out a ridiculous amount of money on what could be an easy fix.
The problem occurs at low revs/tickover, usually after decelerating, and results in the engine being hesitant to pull away. However, once the revs build above about 2000, it pulls fine, and both performance and fuel consumption are then normal.
After being reset, the engine management light usually takes a few days to come on.
Recently, the problem has been compounded by an intermittent hissing sound coming from below the inlet manifold, and the engine running really rough on tickover/low revs. This generally lasts for a few seconds/minute before clearing itself.
The main engine fault code that appears (for any techies oUt there) is :-

17705 TURBO/THROTTLE VALVE CONNECTION PRESSURE LOSS.

But other fault codes have been present too.

The air mass meter was changed about 2 1/2 years ago under warranty.

Has anyone had any similar problems, or can suggest a cheap/simple fix ????

HELP !!!!!!!!!!!!

**VRStu** · 31-01-2007, 20:12

You could try - http://www.briskoda.net/forums/searc...archid=1978749

phillip · 31-01-2007, 22:16

Cheers, stu...wasn't aware that it was such a common problem, but having read the above threads, I can see that it is, and that I am not alone.
Had the fault codes cleared this afternoon, and he also reset the throttle body to the factory default spec (??), and it ran fine on the way home, but I have just put it away in the garage, and it is spluttering again, so I will purchase and fit a new pipe and see if that cures it !!!!!
Cheers buddy !

**VRStu** · 31-01-2007, 22:20

No probelm, I hope you get it sorted ok.

Lummox · 31-01-2007, 23:15

Check for hissing noises under the inlet manifold at idle. Quite often one of the vacuum pipes inder there splits and will open up under boost and log that fault.

Easily missed as well.

phillip · 31-01-2007, 23:35

M-03...hissing noise only comes intermittently, and then goes off, so I don't think it is a split pipe. It sounds like a valve is sticking somewhere, which then opens up and cures the problem. It usually occurs when starting up if the engine has been run recently i.e. when warm, but only lasts a few seconds.

phillip · 01-02-2007, 18:01

AAAAARGH !!!!!!!

Got underneath and took the old one off and it has already been replaced with the new part no. !!!!!!! (06A 145 790 C)

There was a small quantity of OIL in there though, which I thought strange.
I cleaned it out, hoping that might have helped, and put it back, but the poor idling/low revs problem still seems to be there (although the engine management light has yet to come back on).

Any more ideas ????

Lummox · 01-02-2007, 22:08

Its a pretty big list of things to check for this fault code and not something you can fumble though.

If the idle is suffering just try spraying some WD40 under the inlet manifold and se if the idle changes at all.

phillip · 01-02-2007, 22:45

Ta mate...will try that 2moz...could it be the MAF that may have gone again, and is there any way to check it ???

phillip · 13-02-2007, 21:19

RESULT !!!!!!
Took it back to my local independant VW specialist when the engine management light came back on again on Friday, and he located a split rubber air pipe under the inlet manifold. He fixed it with a short length of smaller diameter tubing inserted inside the old one, and then taped it all up....Hey Presto problem solved !!!!!
Total cost £5 !!!!!!!!!

31-01-2007, 18:08	#1
phillip Briskodian Join Date: Jan 2007 Location: west yorks Posts: 206 Members Car: Octavia vRS Thanks: 3 Thanked 6 Times in 4 Posts	new member with '02 octavia vrs diagnostic problem Hello people, just found this website, having owned my '51 Octavia vRS for 3 years now. I have had a lot of problems with the engine management light coming on, and have had it checked by a local garage a few times now, and the light reset, but they are no experts in diagnostics, and didn't really know what to suggest other than taking it to a local specialist, who will no-doubt charge a fortune to analyse it, and even more to supposedly fix it, but me being a tight git, I don't want to fork out a ridiculous amount of money on what could be an easy fix. The problem occurs at low revs/tickover, usually after decelerating, and results in the engine being hesitant to pull away. However, once the revs build above about 2000, it pulls fine, and both performance and fuel consumption are then normal. After being reset, the engine management light usually takes a few days to come on. Recently, the problem has been compounded by an intermittent hissing sound coming from below the inlet manifold, and the engine running really rough on tickover/low revs. This generally lasts for a few seconds/minute before clearing itself. The main engine fault code that appears (for any techies oUt there) is :- 17705 TURBO/THROTTLE VALVE CONNECTION PRESSURE LOSS. But other fault codes have been present too. The air mass meter was changed about 2 1/2 years ago under warranty. Has anyone had any similar problems, or can suggest a cheap/simple fix ???? HELP !!!!!!!!!!!!

31-01-2007, 20:12	#2
VRStu Txt Spk Police Join Date: Dec 2004 Location: Hampshire Posts: 20,834 Members Car: Audi S3 Thanks: 145 Thanked 998 Times in 894 Posts	Re: new member with '02 octavia vrs diagnostic problem You could try - http://www.briskoda.net/forums/searc...archid=1978749 __________________ Stu Stu's Websites - http://www.fabia-vrs.com & http://www.octavia-vrs.com Stu's Car - 2008 Audi S3 - Ibis White, Black Optics Pack, Privacy Glass, Auto Bi Xenon Headlights, Rain Sensing Wipers, Bose Sound System, Ipod Prep, GSM Phone Prep, Flat Bottom Multi Function Steering Wheel, Electric Folding Mirrors, Acoustic Parking, Cruise Control, Interior Light Pack, Non Smokers Pack. SWMBO's Car - 2008 Seat LEON TDi Stylance, Black Magic, Sports Pack, Rear Parking Sensors. Something for Weekend - A Patio

31-01-2007, 22:16	#3
phillip Briskodian Join Date: Jan 2007 Location: west yorks Posts: 206 Members Car: Octavia vRS Thanks: 3 Thanked 6 Times in 4 Posts	Re: new member with '02 octavia vrs diagnostic problem Cheers, stu...wasn't aware that it was such a common problem, but having read the above threads, I can see that it is, and that I am not alone. Had the fault codes cleared this afternoon, and he also reset the throttle body to the factory default spec (??), and it ran fine on the way home, but I have just put it away in the garage, and it is spluttering again, so I will purchase and fit a new pipe and see if that cures it !!!!! Cheers buddy !

31-01-2007, 22:20	#4
VRStu Txt Spk Police Join Date: Dec 2004 Location: Hampshire Posts: 20,834 Members Car: Audi S3 Thanks: 145 Thanked 998 Times in 894 Posts	Re: new member with '02 octavia vrs diagnostic problem No probelm, I hope you get it sorted ok. __________________ Stu Stu's Websites - http://www.fabia-vrs.com & http://www.octavia-vrs.com Stu's Car - 2008 Audi S3 - Ibis White, Black Optics Pack, Privacy Glass, Auto Bi Xenon Headlights, Rain Sensing Wipers, Bose Sound System, Ipod Prep, GSM Phone Prep, Flat Bottom Multi Function Steering Wheel, Electric Folding Mirrors, Acoustic Parking, Cruise Control, Interior Light Pack, Non Smokers Pack. SWMBO's Car - 2008 Seat LEON TDi Stylance, Black Magic, Sports Pack, Rear Parking Sensors. Something for Weekend - A Patio

31-01-2007, 23:15	#5
Lummox Cupra Bush King Join Date: Sep 2003 Location: Newport Pagnell Posts: 22,421 Members Car: Mk2 Golf GTi 16v and building a 20VT MK2. Images: 2 Thanks: 22 Thanked 746 Times in 626 Posts	Re: new member with '02 octavia vrs diagnostic problem Check for hissing noises under the inlet manifold at idle. Quite often one of the vacuum pipes inder there splits and will open up under boost and log that fault. Easily missed as well.

31-01-2007, 23:35	#6
phillip Briskodian Join Date: Jan 2007 Location: west yorks Posts: 206 Members Car: Octavia vRS Thanks: 3 Thanked 6 Times in 4 Posts	Re: new member with '02 octavia vrs diagnostic problem M-03...hissing noise only comes intermittently, and then goes off, so I don't think it is a split pipe. It sounds like a valve is sticking somewhere, which then opens up and cures the problem. It usually occurs when starting up if the engine has been run recently i.e. when warm, but only lasts a few seconds.

01-02-2007, 18:01	#7
phillip Briskodian Join Date: Jan 2007 Location: west yorks Posts: 206 Members Car: Octavia vRS Thanks: 3 Thanked 6 Times in 4 Posts	Re: new member with '02 octavia vrs diagnostic problem AAAAARGH !!!!!!! Got underneath and took the old one off and it has already been replaced with the new part no. !!!!!!! (06A 145 790 C) There was a small quantity of OIL in there though, which I thought strange. I cleaned it out, hoping that might have helped, and put it back, but the poor idling/low revs problem still seems to be there (although the engine management light has yet to come back on). Any more ideas ????

01-02-2007, 22:08	#8
Lummox Cupra Bush King Join Date: Sep 2003 Location: Newport Pagnell Posts: 22,421 Members Car: Mk2 Golf GTi 16v and building a 20VT MK2. Images: 2 Thanks: 22 Thanked 746 Times in 626 Posts	Re: new member with '02 octavia vrs diagnostic problem Its a pretty big list of things to check for this fault code and not something you can fumble though. If the idle is suffering just try spraying some WD40 under the inlet manifold and se if the idle changes at all.

01-02-2007, 22:45	#9
phillip Briskodian Join Date: Jan 2007 Location: west yorks Posts: 206 Members Car: Octavia vRS Thanks: 3 Thanked 6 Times in 4 Posts	Re: new member with '02 octavia vrs diagnostic problem Ta mate...will try that 2moz...could it be the MAF that may have gone again, and is there any way to check it ???

13-02-2007, 21:19	#10
phillip Briskodian Join Date: Jan 2007 Location: west yorks Posts: 206 Members Car: Octavia vRS Thanks: 3 Thanked 6 Times in 4 Posts	Re: new member with '02 octavia vrs diagnostic problem RESULT !!!!!! Took it back to my local independant VW specialist when the engine management light came back on again on Friday, and he located a split rubber air pipe under the inlet manifold. He fixed it with a short length of smaller diameter tubing inserted inside the old one, and then taped it all up....Hey Presto problem solved !!!!! Total cost £5 !!!!!!!!! __________________ PROTECTING THE PEOPLE OF THIS WORLD FROM THE SCUMBAGS OF THE UNIVERSE !!!

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