Golf doesn't start sometimes

[gregozedobe]

The things you can learn on a VW forum !!!!

[Russ59]

Any implant is unlikely to be ferritic and so not attracted by a magnet. It will either be an austenitic stainless steel or something more exotic (eg platinum).

Some inexpensive stainless steels are ferritic, but quality stainless steels are austenitic - the iron atoms form a face centred cubic crystal so you get a largish spacing between the iron atoms and a relatively low density of electron energy levels. Those two factors (the interatomic spacing and the low density of electron energy levels) mean that the magnetic moments of the atoms within the crystals do not align, so you don't get ferromagnetism.

That's why you always carry a small magnet when you go shopping for stainless steel: poor quality stainless steel is magnetic and will rust; the higher quality ss is not magnetic.

You wouldn't happen to be in the business of selling magnetic underlays would you ? I was only joking about the magnetic attraction to my artificial disc, I was aware that it was made from a non ferrous material if it wasn't I would probably have used Rusty59 as my username

[benno]

Jesus christmas I hope your artificial disc isn't made of any kind of metal at all, ferrous or not!

[Russ59]

Jesus christmas I hope your artificial disc isn't made of any kind of metal at all, ferrous or not!

Sorry to go off topic, but this is the link to the device I have implanted in my back http://www.charitedisc.com/charitede...tisCHARITE.asp

It's made from Cobalt Chromium Alloy, sounds a bit like Buzz Lightyear's wing material. Something interesting is that it was originally designed and made in Germany, so maybe that's what drew me towards purchasing the VW this time

[Spoddy]

Sorry to go off topic, but this is the link to the device I have implanted in my back http://www.charitedisc.com/charitede...tisCHARITE.asp

It's made from Cobalt Chromium Alloy, sounds a bit like Buzz Lightyear's wing material. Something interesting is that it was originally designed and made in Germany, so maybe that's what drew me towards purchasing the VW this time

I was going to have that too until they found I needed two and two together won't work as it was "like trying to balance on two footballs rather than just one".... I ended up getting two "Wallace devices" cheaper and not as good but got me going again. The point being that I had no choice to compromise with that but when we had to get a new car I decided enough with compromises so went with the Golf I could afford

[Russ59]

I was going to have that too until they found I needed two and two together won't work as it was "like trying to balance on two footballs rather than just one".... I ended up getting two "Wallace devices" cheaper and not as good but got me going again. The point being that I had no choice to compromise with that but when we had to get a new car I decided enough with compromises so went with the Golf I could afford

Mine was paid for through workers comp, so if it cost more I didn't care, so far I'm a lot better than before the op (coming up 3 years in Sept) never want to go through it again though

[Greg Roles]

I sell all manner of orthopaedic implants, and they stopped being magnetic a LONG time ago. Cobalt chrome is what every total joint, eg hip and knee has been made from in the last 30 years, and they are generally very well tolerated. It's the sacrificial plastic ( if used ) that can be the problem, the wear debris tends to build up between the metal and your bone, and ends up causing the implant to come loose.

Also given the sheer price these stainless and titanium parts cost the end user, they'd want to be top quality stuff, and generally are. Titanium is the exotic metal used, as it's elasticity models bone very well, and bone actually grows into it, adding to the construct.

Avoid the stuff I flog at ALL costs though!

[Greg Roles]

Mine was paid for through workers comp, so if it cost more I didn't care, so far I'm a lot better than before the op (coming up 3 years in Sept) never want to go through it again though

You're one of the lucky ones mate, spinal surgery has about a 60% success rate, as opposed to hips and knees at high 90's. A knee with a 93% success rate is viewed badly.

This has to get an award for going the most off topic, ever??

[gldgti]

but an educational off topic discussion, none-the-less. well done sooties.

back ON TOPIC -

i have atheory you may all be barking up the wrong tree about the glow plug scenario - my theory is AIR.

its a common symptom of air in the fuel delivery system to have bad starting and rough running in a diesel. furthermore, the times when air creeps in to a system are when its been sitting for a long time, or at strange times, like being parked on a funny angle overnight, etc. the reason for air causing bad starting are these:

1. Air is highly compressible, compared to diesel fuel. hence, in hte HIGH PRESSURE fuel delivery system of a diesel fuel system, air acts as a large spring, causing insufficient injection, or none at all. it may also occupy a large volume within the lines, compared with the relativly small quantity of fuel that is injected in each stroke. this means that it can take a long time to pump the air out of the fuel system (much cranking).

2. The car may start and run rough until the air is out of the system completely, because of the insufficient fuel injection quantities, and also causing retarded injection timing (air acts as a buffer in the line).

i would first be looking for any possible areas for air to leak into the system (supply line hose clamps are the most common culprit).

hope that helps.

[Greg Roles]

Check out the big brain on gldgti!

[Spoddy]

Any implant is unlikely to be ferritic and so not attracted by a magnet. It will either be an austenitic stainless steel or something more exotic (eg platinum).

Some inexpensive stainless steels are ferritic, but quality stainless steels are austenitic - the iron atoms form a face centred cubic crystal so you get a largish spacing between the iron atoms and a relatively low density of electron energy levels. Those two factors (the interatomic spacing and the low density of electron energy levels) mean that the magnetic moments of the atoms within the crystals do not align, so you don't get ferromagnetism.

That's why you always carry a small magnet when you go shopping for stainless steel: poor quality stainless steel is magnetic and will rust; the higher quality ss is not magnetic.

Hi VM
You don't come along very often these days but when you do the advice and information are priceless

[Russ59]

Hi VM
You don't come along very often these days but when you do the advice and information are priceless

Maybe next time professor vmq could post in english

[Transporter]

It is possible but the car done only 14,000km.
Anyway, to check for the air in the fuel system:
In neutral keep the rews steady at 2,000 - 2,500 rpm, if the rpm's are nice and steady there should be no air.
How ever if the engine's rpm's will start going up and down when you hold accelerator steady you have air in the diesel fuel.
It happens sometimes when the fuel filter is replaced and aftermarket filter used instead the genuine one.
Usually the engine will not start when it is not used over the weekend.

He needs to take it to the dealer for proper check up.

[Preen59]

Check out the big brain on gldgti!

Well he IS our resident screw around with diesels man.

[gldgti]

Well he IS our resident screw around with diesels man.

hehe.

i would say an air leak like this is no more or less likely to be occasioned in a car with more or less km's on the clock.... a service tech giving a fuel ine a good whack by accident could have disturbed a line, or perhaps even a crack somewhere....

air leaks are invariably difficult to find, and the intermittent nature of the problem means one is less likely to have a good go at fixing it.... as such they tend to hang around until one day, you just find the cause of it by accident