'Misfuel' - Misdiagnosis? Who is to blame?

missile

arcon5 wrote: »

Not really.
Damaged fuel pump is exactly what a midfield would cause and pretty quickly also if high concentration

Absolute BS. Are you the AA man per chance?

debtdebt

http://www.syscohq.com/products.html

Sounds like a load of cr4p to me. You're the only one to blame if you paid £419 plus vat for a fuel treatment.

arcon5

missile wrote: »

Absolute BS. Are you the AA man per chance?

No I'm a mechanic and no for a fact petrol I a diesel will easily wipe out a pump and often injectors also!

Your obviously not mechanically minded since you don't seem to be able to link a fuel pump failure and wrong fuel.

System

arcon5 wrote: »

No I'm a mechanic and no for a fact petrol I a diesel will easily wipe out a pump and often injectors also!

Your obviously not mechanically minded since you don't seem to be able to link a fuel pump failure and wrong fuel.

Not after 3 miles when it is still running on the fuel in the filter and injector lines.

Yours sincerely, a qualified and time served mechanic who can spell simple four letter words.

Stoke

The problem with all this, is that (imo), the OP took the big decision to listen to the AA and these fuel fix monkeys. It's not always easy to think when your stressed and things are going wrong, but in reality, the solution would have been to tow it back to VW.

I don't see how the AA or the fuel fix guys are even at fault and good luck getting VW to pay for a pump when you've thrown in some weird snake oil.

arcon5

Tarambor wrote: »

Not after 3 miles when it is still running on the fuel in the filter and injector lines.

Yours sincerely, a qualified and time served mechanic who can spell simple four letter words.

You obviously don't have a clue how a fuel system works.
It doesn't just utilise fuel in the lines and replenish at a steady rate like a petrol, it's constantly changing and circulating. Fuel pressure is constantly changing based on the demands. Thus pressure constantly released and increased based on engine speed, throttle position etc etc. The flow also aids cooling.

Your obviously not very knowledgeable so do your ow research before spouting rubbish.

arcon5

Tarambor wrote: »

Not after 3 miles when it is still running on the fuel in the filter and injector lines.

Yours sincerely, a qualified and time served mechanic who can spell simple four letter words.

Lol nice one :rotfl:

missile

arcon5 wrote: »

No I'm a mechanic and no for a fact petrol I a diesel will easily wipe out a pump and often injectors also!

Your obviously not mechanically minded since you don't seem to be able to link a fuel pump failure and wrong fuel.

There is no way petrol mixed with diesel would cause failure of pump and injectors within 3 miles. You should get a job with AA :rotfl:

wongataa

arcon5 wrote: »

You obviously don't have a clue how a fuel system works.
It doesn't just utilise fuel in the lines and replenish at a steady rate like a petrol, it's constantly changing and circulating. Fuel pressure is constantly changing based on the demands. Thus pressure constantly released and increased based on engine speed, throttle position etc etc. The flow also aids cooling.

Your obviously not very knowledgeable so do your ow research before spouting rubbish.

Petrol engine systems work the same way as you describe too. The fuel pump is constantly pump a lot of fuel out of the tank. A pressure regulator keeps the fuel line pressure at the correct level. As the injectors only deliver small quantities of fuel at a time the pump is delivery way more fuel than is required to power the vehicle. The excess fuel is sent back to the fuel tank.

esmerobbo

wongataa wrote: »

Petrol engine systems work the same way as you describe too. The fuel pump is constantly pump a lot of fuel out of the tank. A pressure regulator keeps the fuel line pressure at the correct level. As the injectors only deliver small quantities of fuel at a time the pump is delivery way more fuel than is required to power the vehicle. The excess fuel is sent back to the fuel tank.

A diesel engine has a high pressure pump common rail or an injection pump, mechanical injection some have a separate fuel delivery pump. Which supplies these pumps, both these types of pumps require lubrication which they get from the diesel. The delivery pump doesn't usually need lubrication however some lift pumps do.

Diesels also circulate fuel much faster then a petrol engine as they are running at very much higher pressure.

Running a diesel with no lubricant in the fuel (petrol) can damage the pump and the injectors, it would be unlucky to do it in such a short distance but I have seen it, last one I saw was a Rangerover got from Burtonwood services to the A49 turn off, less then 2 miles and killed the injection pump.