Bora 130 Tdi Performance issues

sgn · 21-10-2008, 07:15 PM

Can anyone help,when the engine is cold (after standing overnight) the car starts no problem but when i drive off i can put the accelerator pedal to the floor with little or no response for a few seconds then it will acellerate as you would expect.after it has run for a few minutes it is much better but it always has a delay of about 1-2 seconds before anything happens.
I,ve changed the maf,temp sensor,egr valve and the 'o' rings in turbo pipes.
Scanned by VW twice - no errors found.
Any ideas?
Thanks for any input.

benjie · 21-10-2008, 08:07 PM

What gear and speed is this happening in?

Warm the engine up tomorrow and test it again with a stopwatch, then post back on here with exactly how long it is between putting your foot down and reaction time.

sgn · 21-10-2008, 09:17 PM

Thanks for reply benjie,i'll check tomorrow,but it's like putting your foot on a sponge,particularly dangerous at junctions.What i have noticed is i can switch it off and restart it can be better or worse than it was.When it's running bad theres a slight rattle on the engine (like a pinking noise) and the mpg drops about 10.

sgn · 22-10-2008, 06:11 PM

Timed it today,driving off from start - delay about 3secs+ under about 1800 revs 1st/2nd/3rd - delay is about 2-3 secs, above 1800 revs - no delay noticable.

pingpongpo · 22-10-2008, 09:20 PM

My golf doesn't get going until about 2000rpm when the turbo kicks in for real.

I don't think the turbo does anything until at least 1900rpm....

benjie · 22-10-2008, 09:20 PM

Well I must say I think I'm a bit stumped! I could be your MAF (I know you've replaced it) - do you have access to vag-com? You can plug it into that and read the values from the MAF (01 - Engine > Measuring Blocks > Group 3(possibly) - the specified value should be something between 230-360mg/stroke (from memory) when the engine is at warm idle and the actual value should be 10+/-.
You could have a vacuum hose leak from somewhere?

Is it juddery when cold or not?

sgn · 22-10-2008, 11:18 PM

It sometimes judders when it's ticking over when hot and cold,but not all the time.I did about 80 mls tonight and every time i accelerated it sounded like there was a pinking noise or light rattle (Just like a petrol engine running lean/timing out) tomorrow it might be ok,it's intermitent.I'll try to get hold of vag-com and have a look.
cheers

benjie · 22-11-2008, 02:37 AM

Did you manage to get this sorted? Just thinking, does the car smoke much under accelleration (either when the problem is happening, or when it's fine?)

21-10-2008, 07:15 PM	#1 (permalink)
sgn Fiat 500 Join Date: Feb 2007 Location: Gwent Posts: 26	Bora 130 Tdi Performance issues Can anyone help,when the engine is cold (after standing overnight) the car starts no problem but when i drive off i can put the accelerator pedal to the floor with little or no response for a few seconds then it will acellerate as you would expect.after it has run for a few minutes it is much better but it always has a delay of about 1-2 seconds before anything happens. I,ve changed the maf,temp sensor,egr valve and the 'o' rings in turbo pipes. Scanned by VW twice - no errors found. Any ideas? Thanks for any input.

21-10-2008, 08:07 PM	#2 (permalink)
benjie Volkswagen Golf GTi Join Date: Aug 2004 Location: Swindon area Posts: 612	What gear and speed is this happening in? Warm the engine up tomorrow and test it again with a stopwatch, then post back on here with exactly how long it is between putting your foot down and reaction time. __________________ B6 A4 130TDI quattro Sport

22-10-2008, 09:20 PM	#6 (permalink)
benjie Volkswagen Golf GTi Join Date: Aug 2004 Location: Swindon area Posts: 612	Well I must say I think I'm a bit stumped! I could be your MAF (I know you've replaced it) - do you have access to vag-com? You can plug it into that and read the values from the MAF (01 - Engine > Measuring Blocks > Group 3(possibly) - the specified value should be something between 230-360mg/stroke (from memory) when the engine is at warm idle and the actual value should be 10+/-. You could have a vacuum hose leak from somewhere? Is it juddery when cold or not? __________________ B6 A4 130TDI quattro Sport

22-11-2008, 02:37 AM	#8 (permalink)
benjie Volkswagen Golf GTi Join Date: Aug 2004 Location: Swindon area Posts: 612	Did you manage to get this sorted? Just thinking, does the car smoke much under accelleration (either when the problem is happening, or when it's fine?) __________________ B6 A4 130TDI quattro Sport

21-10-2008, 09:17 PM	#3 (permalink)
sgn Fiat 500 Join Date: Feb 2007 Location: Gwent Posts: 26	Thanks for reply benjie,i'll check tomorrow,but it's like putting your foot on a sponge,particularly dangerous at junctions.What i have noticed is i can switch it off and restart it can be better or worse than it was.When it's running bad theres a slight rattle on the engine (like a pinking noise) and the mpg drops about 10.

22-10-2008, 06:11 PM	#4 (permalink)
sgn Fiat 500 Join Date: Feb 2007 Location: Gwent Posts: 26	Timed it today,driving off from start - delay about 3secs+ under about 1800 revs 1st/2nd/3rd - delay is about 2-3 secs, above 1800 revs - no delay noticable.

22-10-2008, 09:20 PM	#5 (permalink)
pingpongpo TVR 350C Join Date: Sep 2005 Posts: 2,350	My golf doesn't get going until about 2000rpm when the turbo kicks in for real. I don't think the turbo does anything until at least 1900rpm....

22-10-2008, 11:18 PM	#7 (permalink)
sgn Fiat 500 Join Date: Feb 2007 Location: Gwent Posts: 26	It sometimes judders when it's ticking over when hot and cold,but not all the time.I did about 80 mls tonight and every time i accelerated it sounded like there was a pinking noise or light rattle (Just like a petrol engine running lean/timing out) tomorrow it might be ok,it's intermitent.I'll try to get hold of vag-com and have a look. cheers