Sudden power loss Octavia TDI

DAVID HOWARTH · 11-08-2006, 14:49

Hello!

Any ideas on this problem?

1999 Octavia 110 TDI with tuning box: Overtaking the other day it suddenly stopped pulling, almost as if I'd run into the rev limiter ( I hadn't ). From then on the engine has felt flat and the idle has gone lumpy when cold. Also an occasional hesitation low in the rev range. Also the computer average fuel consumption read out seems to be reading high now.
Have read about ECU and MAF problems. Also heard about turbos giving up on these transverse engines; in fact it almost seems as if the turbo isn't boosting properly. But would that account for the lumpy idle?

Before I push it over a cliff or spend a heap of cash not solving the problem, has anyone any ideas on this one?

All suggestions greatfully received!!

Goochie · 11-08-2006, 14:58

Lumpy idle sounds MAF related. Or possibly a split vacuum hose.

cheezemonkhai · 11-08-2006, 15:28

Search for cleaning the MAF on here, but split hose would make sense. I'd lean towards the hose at the power went as you booted it to overtake, which would have put a vacuum hose under more pressure.

**VRStu** · 11-08-2006, 16:07

Does it smoke more than usual?

Do you have access to VAG-COM to read the fault codes?

Kandy · 11-08-2006, 18:06

Also, perhaps try taking your tuning box off and see if things improve? Have a look at the turbine and check it spins OK? Someone else posted a link to this site which I've been reading avidly: http://tdiclub.com/TDIFAQ/TDiFAQ-8.html

DAVID HOWARTH · 13-08-2006, 15:50

Thanks to all who posted.
I've looked at the myriad of turbo related hoses and changed 2 that looked a bit dogeared. No luck, car still down on power. I definately need to get someone to do a fault code read on it. I haven't noticed more smoke than usual and I've taken off the power box and the fault is still there. The link to the TDI club is intriging and gives me lots to go at. thanks all again.

Steve_M · 14-08-2006, 18:32

Almost certainly the MAF has gone. Just changed mine. 10 minute job. Sweet as a nut again. Try your nearest German, Swedish and French Auto Parts - they do one for round about £35 plus VAT.

11-08-2006, 14:49	#1
DAVID HOWARTH Briskodian Join Date: Aug 2006 Posts: 4 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Sudden power loss Octavia TDI Hello! Any ideas on this problem? 1999 Octavia 110 TDI with tuning box: Overtaking the other day it suddenly stopped pulling, almost as if I'd run into the rev limiter ( I hadn't ). From then on the engine has felt flat and the idle has gone lumpy when cold. Also an occasional hesitation low in the rev range. Also the computer average fuel consumption read out seems to be reading high now. Have read about ECU and MAF problems. Also heard about turbos giving up on these transverse engines; in fact it almost seems as if the turbo isn't boosting properly. But would that account for the lumpy idle? Before I push it over a cliff or spend a heap of cash not solving the problem, has anyone any ideas on this one? All suggestions greatfully received!!

11-08-2006, 14:58	#2
Goochie Briskodian Join Date: Jan 2004 Location: Up a tree. Posts: 12,363 Members Car: Thanks: 7 Thanked 27 Times in 25 Posts	Re: Sudden power loss Octavia TDI Lumpy idle sounds MAF related. Or possibly a split vacuum hose.

11-08-2006, 15:28	#3
cheezemonkhai Briskodian Join Date: Jan 2006 Posts: 15,665 Members Car: Thanks: 123 Thanked 527 Times in 488 Posts	Re: Sudden power loss Octavia TDI Search for cleaning the MAF on here, but split hose would make sense. I'd lean towards the hose at the power went as you booted it to overtake, which would have put a vacuum hose under more pressure. __________________ Cars make CO2 and trees absorb CO2. By driving your car you're feeding a tree and helping the environment.

11-08-2006, 16:07	#4
VRStu Txt Spk Police Join Date: Dec 2004 Location: Hampshire Posts: 20,856 Members Car: Audi S3 Thanks: 145 Thanked 999 Times in 895 Posts	Re: Sudden power loss Octavia TDI Does it smoke more than usual? Do you have access to VAG-COM to read the fault codes? __________________ 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

11-08-2006, 18:06	#5
Kandy Briskodian Join Date: Jul 2006 Location: Sussex Posts: 585 Members Car: 2003 MkI L&K PD130 OCTAVIA Thanks: 1 Thanked 21 Times in 18 Posts	Re: Sudden power loss Octavia TDI Also, perhaps try taking your tuning box off and see if things improve? Have a look at the turbine and check it spins OK? Someone else posted a link to this site which I've been reading avidly: http://tdiclub.com/TDIFAQ/TDiFAQ-8.html

13-08-2006, 15:50	#6
DAVID HOWARTH Briskodian Join Date: Aug 2006 Posts: 4 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Re: Sudden power loss Octavia TDI Thanks to all who posted. I've looked at the myriad of turbo related hoses and changed 2 that looked a bit dogeared. No luck, car still down on power. I definately need to get someone to do a fault code read on it. I haven't noticed more smoke than usual and I've taken off the power box and the fault is still there. The link to the TDI club is intriging and gives me lots to go at. thanks all again.

14-08-2006, 18:32	#7
Steve_M Briskodian Join Date: Jul 2006 Posts: 1 Members Car: Thanks: 0 Thanked 0 Times in 0 Posts	Re: Sudden power loss Octavia TDI Almost certainly the MAF has gone. Just changed mine. 10 minute job. Sweet as a nut again. Try your nearest German, Swedish and French Auto Parts - they do one for round about £35 plus VAT.

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