Engine wobble?

[AlexD333]

mine does the same,
its the engine saying too much veg, not enough derv

Wicked im happy a few have is issue too.

I'd still love to know what it is though.

You know what I mean? What is the judder/wobble? Over fuelling?
Viscosity overload? :nenau still case closed :thumb2

 

[R1cho]

its still scarey to me usin veg.
a little at a time and don't jump in im thinkin.
but the little I did put in.
mrs j commented on how quiet the engine is. despite no exhaust,carpets,etc.
so the answer I would say is in moderation it benefits,but don't be greedy

yes it is, you have to figure out your own ratio of what you are happy with, for example what alex says is juddering some of us might think is normal and not worry about it, i will say tho when driving using veg my engine sounds a lot happier

 

[puddle hoppers inc.]

i know when i have added too much oil, over a few vehicles, slow starting, bit lumpy, failing to rev as easy, just get the mix right, some will some wont.

 

[R1cho]

i know when i have added too much oil, over a few vehicles, slow starting, bit lumpy, failing to rev as easy, just get the mix right, some will some wont.

yesterday i put 60 litres of veg in and £10 diesel, its running fine

 

[puddle hoppers inc.]

She's on 40 litres of veg and about 8'quidsmworth of diesel

thats not enough in my opinion, gallon of derv to 6? of veg? give it a bit more derv til you find a % that runs/starts good for your engine.

 

[AlexD333]

i know when i have added too much oil, over a few vehicles, slow starting, bit lumpy, failing to rev as easy, just get the mix right, some will some wont.

Yeah i get the lumpy misfire in the morn, after the auto choke turns off. She coughs and smokes. Once she gets a bit of temp she's back to normal.
I presume this is also a veg symptom. (This was neat veg only)

 

[puddle hoppers inc.]

i put 40 veg and 20 diesel with the temps changing from 0 to 10celcius within 24hrs these days, safe mix for me. will do 85/90 in summer, never neat.

 

[AlexD333]

i put 40 veg and 20 diesel with the temps changing from 0 to 10celcius within 24hrs these days, safe mix for me. will do 85/90 in summer, never neat.

Oh, never neat you say? Just too much?

Whats the risk of neat veg? Or just rough running?

 

[R1cho]

Oh, never neat you say? Just too much?

Whats the risk of neat veg? Or just rough running?

none starting, dead battery, phoning friends fro a lift to get some diesel to put in, shaking the truck to mix the diesel in, the list goes on lol

 

[puddle hoppers inc.]

i always add a bit of derv, even in hot months, maybe its just a safety blanket thing?

 

[puddle hoppers inc.]

none starting, dead battery, phoning friends fro a lift to get some diesel to put in, shaking the truck to mix the diesel in, the list goes on lol

or as above lol

 

[judd750]

had a bad craving for chips today after a 20 mile run !
must be too much veg oil

 

[AlexD333]

none starting, dead battery, phoning friends fro a lift to get some diesel to put in, shaking the truck to mix the diesel in, the list goes on lol

Ahahah i do the shake trick. Just a force of habit i guess.

Night all gotta go into work tomorrow to do leak off pipes..

Early start

 

[puddle hoppers inc.]

mind those lil circlip type clips!

 

[R1cho]

mind those lil circlip type clips!

circlips? please tell me you dont have circlips on the leakoff pipes

 

[puddle hoppers inc.]

not sure what they are called? little awkward buggering clamp clips?

 

[rustic]

Yeah i get the lumpy misfire in the morn, after the auto choke turns off. She coughs and smokes. Once she gets a bit of temp she's back to normal.
I presume this is also a veg symptom. (This was neat veg only)

Auto choke...?? What is an Auto choke on a diesel?:nenau

I have a hand throttle on my Mav, that increases the tick over revs, but that's all it does, it doesn't alter the mixture.
I find I have more control of the throttle with the hand throttle when descending steep bumpy or icy roads, in low gear than my right foot, which can blip the throttle, which can cause you to loose traction.

I know the old ford Cortina MkIV petrol, had an auto choke.. :doh most people converted them to manual, so they could start the car, even when warm...
What a pain these were...

No auto choke on a diesel.

What you have is the glow plugs remain on or partially on, ie they are pulsed for a short time on the Tdi once started.:thumb2

Rustic

 

[AlexD333]

Auto choke...?? What is an Auto choke on a diesel?:nenau

I have a hand throttle on my Mav, that increases the tick over revs, but that's all it does, it doesn't alter the mixture.
I find I have more control of the throttle with the hand throttle when descending steep bumpy or icy roads, in low gear than my right foot, which can blip the throttle, which can cause you to loose traction.

I know the old ford Cortina MkIV petrol, had an auto choke.. :doh most people converted them to manual, so they could start the car, even when warm...
What a pain these were...

No auto choke on a diesel.

What you have is the glow plugs remain on or partially on, ie they are pulsed for a short time on the Tdi once started.:thumb2

Rustic

Ahh thanks dude, and this temp turns up the revs?

She starts ok about 1k revs when cold. After she warms she drops to 500 (usually when she starts to misfire)

Saying that last night i altered the mix, it's no linger straight veg so I will report after work :thumb2

 

[AlexD333]

Puddle hopper and r1cho I will report on those bugger baistard clips :lol

 

[rustic]

Ahh thanks dude, and this temp turns up the revs?

She starts ok about 1k revs when cold. After she warms she drops to 500 (usually when she starts to misfire)

Saying that last night i altered the mix, it's no linger straight veg so I will report after work :thumb2

The Tdi is fly by wire, so the tick over revs are controlled by the ecu.
The ecu monitors the engine temperature, via one of the three sensors next to the thermostat housing, and adjusts the revs on start up to suit.
But before thinking that one of these sensors is faulty, you need to sort out your fuel mix.
The glow plugs need to be all working too, easy to check, see download section.

From all the advice so far, it looks like you need to adjust the mix.:thumb2

Initially I would try 50/50 for a while, if ok after a week of cold starts, then try 75% SVO to 25% diesel and tweak from there.
In warmer weather, you can increase the ratio, BUT if it gets colder then you need to add more diesel.

Don't forget, the night temperature gets to 5c so fairly cold, so you do need the correct mix.

Some advice...
Mark on your calendar or diary what blend you used, and what the average temperature was, also a brief sentence on how it performed, then from Autumn onwards, you will anticipate the correct blend, vs temperature:thumb2

Randomly adding diesel, is not scientific, and neither is mixing litres of svo and a few pounds of diesel, try to work in the same units, eg litres, then when you calculate the mix as a percentage, or a ratio, then the mix can be controlled no matter how much you make up.
Try adding both at the same time, if not practical, then diesel first then when you get home, the svo
Shaken not stirred... It might help to have a few cans of diesel to add as you do the svo addition, to help it mix.
I don't know how well the two mix together, but if you brim the tank, then there is not enough room for the fuels to swirl around, eg when you go around corners or brake. I would think, up to 75% ie 3/4 full would allow plenty of room to mix well, a few low speed stops, after you start her up should do it.

Rustic