Audi A4 1.9tdi 2004 won't start.

kilkenny31

Hi Guys

My audi a4 isnt starting, its been an ongoing issue, happened 1st around Christmas and about three times since. Its happened again today.

Each time its the same problem the car turns over but just wont start. 1st time i called the mechanic he said to try jump start when its being towed, i tried it and it did start. It started normally from then so the mechanic was unable to find out what the problem is.

Second time about 5-6 weeks later it didn't start i got tow truck out and got it towed directly to the mechanic. He was unable to find out what was causing the problem.

The last time i've just got someone to tow the car and started it ran for a month or so and again today it wont start. Does anyone have any idea what might be causing this? As i said it turns over fine but just wont start. Jump Starts when being towed. Once it starts it seems to be ok for weeks before it happens again.

Any help would be appreciated. I don't know where to go from here.

Saucy McKetchup

Fuel filter or injector problem would be my guess

Stoolbend

Did he plug into it?

If so was there any faults stored?

kilkenny31

yeah he said he plugged into it and he changed a few sensors and there was no joy. If its an injector problem is it an expensive fix?

Chimaera

Start by looking for leaks in the fuel system. It sounds like it's losing prime - prolonged attempts at starting are bringing fuel up and it eventually starts for you.

After that get it scanned with a VAG specific diagnostic tool.

kilkenny31

Hi, been running fine the past two months but it happended again over the weekend, got the car scanned, saying a intermittent missfire in cylinder 1. Mechanic thinks its an injector problem. Anyone else have an opinion, would really appreciate it.

debabyjesus

Injector wiring loom can give bother so id be replacing that before looking at injectors. Do you ever notice a rough idle or missfire?

George Dalton

Most of the time with symptoms like that on a PD it's an injector issue.

kilkenny31

debabyjesus wrote: »

Injector wiring loom can give bother so id be replacing that before looking at injectors. Do you ever notice a rough idle or missfire?

Yeah especially after the car is started, the missfire can feel quiet strong. The car shakes a lot. Once its be going for a while it doesn't seem noticeable.

George Dalton

Definitely sounds like an injector issue.

kilkenny31

George Dalton wrote: »

Definitely sounds like an injector issue.

A mechanic today said it might be a timing issue, he says its possible when the timing belt was done it wasn't tightened properly and may have moved a mill or two. He wants to put it on a diagnostic to see if it is. The problem is the engine management light is not after coming on so its harder to diagnose.

George Dalton

I thought you said you already had it scanned and there was a fault for a misfire on cylinder 1?

OldMrBrennan83

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George Dalton

Patww79 wrote: »

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A faulty loom will cause a misfire but will not make the car difficult to start.

kilkenny31

George Dalton wrote: »

I thought you said you already had it scanned and there was a fault for a misfire on cylinder 1?

Yes it has. mechanic says it's unlikely a faulty injector will cause it not to start, my knowledge is limited thats why im on here. I don't want to go down the road of trying a number of fixes and none of them working, i want to find out what the most likely problem is and get it fixed.

George Dalton

Faulty injectors are the most common cause of a non start on a B6 A4 with PD engine in our experience.

kilkenny31

George Dalton wrote: »

Faulty injectors are the most common cause of a non start on a B6 A4 with PD engine in our experience.

Ok thanks for your help, how much roughly does it cost to replace one either firstly by getting the one thats in reconditioned and secondly with a new one?

ardle1

Check the connectors on the injector loom 'yourself'.. Take off the rocker cover and you will see the loom, make sure all 4 connectors are pushed in place... if it runs 'great' after doing that but then the problems return after a short period,, well then replace the loom... Even from main dealer about 60€... Good Luck... P.s... NEVER accept injectors until loom is tested!

kilkenny31

ardle1 wrote: »

Check the connectors on the injector loom 'yourself'.. Take off the rocker cover and you will see the loom, make sure all 4 connectors are pushed in place... if it runs 'great' after doing that but then the problems return after a short period,, well then replace the loom... Even from main dealer about 60€... Good Luck... P.s... NEVER accept injectors until loom is tested!

Ok thanks, ill try this.

George Dalton

kilkenny31 wrote: »

Ok thanks for your help, how much roughly does it cost to replace one either firstly by getting the one thats in reconditioned and secondly with a new one?

Recon about €200 each. New are crazy money.

George Dalton

ardle1 wrote: »

Check the connectors on the injector loom 'yourself'.. Take off the rocker cover and you will see the loom, make sure all 4 connectors are pushed in place... if it runs 'great' after doing that but then the problems return after a short period,, well then replace the loom... Even from main dealer about 60€... Good Luck... P.s... NEVER accept injectors until loom is tested!

The symptoms don't match for a loom issue.

The fault codes are also different for a loom problem vs injector problem.

kilkenny31

George Dalton wrote: »

Recon about €200 each. New are crazy money.

If its showing up that the missfire is in cylinder 1 is it likely that when i get that injector reconditioned that it will solve the problem? or will they all have to be done, ill post a picture here later off the diagnostic reading.

Chimaera

If any injector is misfiring, it's a reasonable bet that the other three won't be too far behind.

OldMrBrennan83

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kilkenny31

Patww79 wrote: »

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Talking to my mechanic he says theres not to many people doing it.

OldMrBrennan83

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Chimaera

Injector servicing requires a lot of expensive equipment and training. Not too many places going to invest in that.

OldMrBrennan83

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Chimaera

No, even servicing older injectors needed expensive equipment. There's at least one place in Limerick, on the Dock Road that does DFIE work (can't recall the name offhand) and there's Gleeson's in Cashel. There are probably a few more around the country if you go googling.

George Dalton

There are very few places in Ireland that are set up to test and repair PD injectors, and even fewer places that I would trust to do the job correctly.

They require different test equipment to common rail injectors and not many places bothered with the investment when such a small volume of cars use the PD system, relatively speaking.

George Dalton

kilkenny31 wrote: »

If its showing up that the missfire is in cylinder 1 is it likely that when i get that injector reconditioned that it will solve the problem? or will they all have to be done, ill post a picture here later off the diagnostic reading.

What we usually recommend is taking out all 4 and sending them away for testing. Then you know exactly where you stand.