CUTS OUT

[mariovr6 0]

hello

lately my vr6 has started to nearly cut out and cutout at times whan dipping the clutch when driving, ive only noticed this when its at running temp, as youd expect when it does cut out the steering goes hard what aint safe

 

ALSO when driving a tiny n i mean a tiny push bit fast i get a dodgy burning smell LIKE BURNING MATCHES it smells like that burning clutch smell but it seems to be coming from the back

 

the ht leads and plugs are fairly new

ANY IDEAS?

[Timo. 0]

ISV probably needs cleaned out. ISV - Idle stablization Value.

 

Do a search for "ISV AND VR6". There's loads of threads on this and how to clean it etc...

 

Not sure about the burning smell. Is it more of an oily burning smell? Most cars smell a bit if you give them a bit of a thrashing!! :mrgreen:

 

Timo.

[mariovr6 0]

where would i find the Idle stablization Value?

the smell is not a normal smell its very strong and weird, could it be the cat by anychance??

[dan 0]

Try this...

[Kevin Bacon 5]

Smells like the CAT, they smell of burning matches/sulphur when they get hot.

 

As for cutting out, join the club! Not many VR6s idle well and an equal amount cutout, or attempt to cutout and then ISV catches it in the nick of time.

 

I reckon it's the MAF. Especially if VAG-COM shows no errors.

 

K

[dan 0]

When I cleaned my ISV the difference was amazing (to say the least).

 

If you have a performance air filter fitted then your ISV is sure to be clogged

[mariovr6 0]

its not a major cut off but its bad enough n so is the smell too!

aint there any good vr6 manules?? whats vag-com?

[Kevin Bacon 5]

There is no manual for curing cutting out. All you need to know about that is contained within this forum. Even the proffessionals don't know how to cure it.

 

Cleaning the valve out helps for a while but there is a fundamental flaw in the VR6's idling system that plagues many cars with the same affliction.

 

VAG-COM is an Engine/ABS diagnostic scanner for home and small business use. It does what VW 1551/1552 does but unlike 1551/2, VAG-COM acually translates the codes for you.

 

K

[Timo. 0]

Bentley do a good manual for the vr6. Its about 90 bucks though :shock: . Well worth the money. I have saved myself about 10 times that by using the manual and doing all the work myself :mrgreen:

 

VAG-com is the computer system VW use to connect to your car to find out what's wrong with it! Usually costs about £20 and can be handy

 

Timo.

[Timo. 0]

bugger, you bet me to it kevhaywire,

 

Damn

 

Timo.

[Kevin Bacon 5]

:lol:

 

That happens a lot doesn't it! I guess we're all just too helpful for our own good, LOL!

 

We need an MSN type thing saying "TIMO is writing a message" and then the rest of us can hold off........but that won't work on a forum!

[Ice White Socks 0]

You know IIRC its not just the ISV that needs cleaning- you have to do the throttle body too. Something about how the crap coming into the throttle body cause the throttle 'flap' not to seal properly when fully shut. This came from my local specialist who- when i had this problem and he was booked up for weeks- he just took me to one side and told me how to clean it myself 8) . never had it stall since :lol:

 

Mike

[Kevin Bacon 5]

Raise the dashpot behind the throttle body too so that it catches the butterfly flap earlier.

 

Cleaning the butterfly flap seems to help but again, it's only a temporary fix unless you junk the breather system (catch tank).

 

I've done all the cleaning, replaced the ISV etc etc and it still wants to cut out 1 in every 10 junction pull-ups. Cuts out completely 1 in every 35-40 I'd say. Sometimes 3 in 10 etc etc, doesn't seem to be any pattern.

 

I'm going to replace the ISV with a 2-stroke leaf blower engine as I'm getting jarred off with it.

[mariovr6 0]

ok could it be this

ive just looked at my spark plugs and they all seem fine except for plug 6 what is very black all over and there only 2 months old, number 6 was like that before i changed them aswell?? could that be the reason for it cutting out? also could it be so dirty due to it was overheating before coz the fan switch broke?

[Kevin Bacon 5]

Is number 6 oily? All 6 should be a grey/white colour with biscuit brown deposits around the centre electrode.

 

Number 6 (and then 1) is a sign of premature bore wear. Cylinders 1 and 6 are always the first to go.

[mariovr6 0]

yep number 6 was wet looking but now its more matt black all over the others 1,2,3,4,5, look fine normal colour.....6 aint as bad as before i changed it when it was very oily black n stunk of petral

the engine is abit noisy like rattles abit..

i was thinking it could be due to the overheating problem i had before now that the temp is fine i get the cutting out and a black plug? no connection then?

whats n where is the dashpot?

[Kevin Bacon 5]

The cutting out is unlikely to be related to a dirty plug number 6, although the VR does seem fussy with plugs, so it won't help matters.

 

The dashpot is a small bellows at the back of the throttle. Look down the back and you'll see a valve type thing with an orange rubber concertina'd cover. On the bracket that holds that is a 13mm nut (underneath). Slacken that off and screw the dashpot upwards to apply more pressure to the the throttle, but not too much or it'll force the throttle open, which you don't want. Try 4 or 5 turns and watch the throttle carefully for lifting.

 

If you really cannot get it to idle, you'll have to raise the throttle stop a little bit, which is the screw under the stop plate near the springs.

 

K

[mariovr6 0]

ok cheers ill take a look now

[craigowl 0]

If you have a performance air filter fitted then your ISV is sure to be clogged

 

Interesting point Dan,

Why does that happen? I cant make up my mind whether to put the K&N panel filter back on or not.

Someone told me the original paper one is still best for avoiding problems but Im not too clear why.

[Bojmobile 0]

I've experienced my VR cutting out in weird situations - in a roundabout as I changed down the oil and battery lights flashed and the steering appeared to lock momentarily before suddenly driving normally again - I nearly PAT my SHANTS! :shock: What's that all about? Sounds similar to the opening posting of this thread!

[Kevin Bacon 5]

If you have a performance air filter fitted then your ISV is sure to be clogged

 

Interesting point Dan,

Why does that happen? I cant make up my mind whether to put the K&N panel filter back on or not.

Someone told me the original paper one is still best for avoiding problems but Im not too clear why.

 

That's not an issue with K&N panel filters as it's so far away from the MAF and any over oiling of those will stick to the intake tube long before it reaches the MAF. It's induction kits that deposit excess oil onto the platinum wire in the MAF because they're so close to it.

 

Paper filters are better for filtration and induction noise suppression but the VR seems to appreciate the panel filter more.

 

K

[craigowl 0]

Thanks k'wire for quality info.

[CazzaVR 0]

Ice White Socks,

 

What's the best way to clean the throttle body? A good soak with carb clean like with the ISV?

 

Cheers

[Kevin Bacon 5]

Get a can of Wynns carb/intake cleaner from halfords, lift the throttle (brick on the gas pedal) and spray all around the butterfly. Wipe the excess fluids away with some strong kitchen towel and ensure there's no grinding noises as you lower and raise the butterfly, which indicates dirt getting caught between the butterfly and throttle housing.

 

Repeat until all shiney, clean and dry.

 

Kev

[CazzaVR 0]

Thanks Kev,

 

So you don't have to take the throttle body off first? Nice and easy for a change then :wink: