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Discussion Starter #1
Hi Everyone,

I've scoured the problems pages but found nothing previously with these issues, so I am throwing myself on the mercy of the ClubToureg members...

Firstly my car is an '04 2.5Tdi Se with the R5 engine and just short of 86000 on the clock. It's been remapped by a very reputable London company and has generally beeen very reliable. until now:

My car has developed starting problem where if I leave it parked on a level surface for more than about 15-20 mins it stumbles on start up and then cranks over for 30 seconds or so until finally firing up.

Interestingly if i leave it parked on a slope with the nose of the car pointing down hill, then it starts perfectly, on the button.

It always starts eventually but it is really embarrassing to sit outside a restaurant or whatever with people looking on and asking if you've broken down.

I took it in to a very reputable VW specialist who looks afer my friends V6tdi and they plugged it into the computer but it came back with no fault codes. They changed the fuel filter as they said it had some condensation in it, but still the problem remains.

Then as if that wasn't enough, I went to check the oil yesterday and as I puller the bonnet or hood release handle located in the footwell, there was a snapping sound and the handle went loose. Broken. At least the bonnet remained shut tight I guess. Is this likely to be hard/expensive to fix as I'm out of warranty now and it's all on my dime!

If any one can help with either of these problems I would be eternally gratefull.
 

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The only time mine does something like this is when I change the fuel filter and there's air in the system. I then need to crank it for a while and it also tends to idle funny for a couple of minutes, until all the air is out.

Sounds to me like a fuel filter/pump/leak/pressure regulator problem, especially since gravity seems to solve it.
 

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Had the same problem as Andriek would not start straight away and when I turned off all electrics it would start, so we replaced the battery and all was well ,some times in traffic when idle it will tick over funny but tip the acelorator and again all is well , check the battery in your garage maybe it not sending out a strong current, when we brought it in he said that there is so much running off it we had to replace it, this is just my 2 cents worth yours Stew. PS we park on a slope and also found it would not start but we had service soon after and maybe we had two problems and did not know it, the battery and filters
 

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Discussion Starter #4
Just to clarify,

When it starts it then runs just fine. The problem is that can take a while cranking over before it catches.

I really don't see it being a battery issue as it cranks over with the power of an ox, an keeps doing so for some while until it does eventually fire up.

If I park on a level surface or with the front of the car pointing up hill, then I have starting issues.

If I park facing down hill, then it starts just fine.

Weird eh?:confused:
 

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If you would just try it if you think about it facing up a hill fuel pump will have to work harder if facing down hill not so hard I myself could not belive it when he said the battery but it worked have not had a problem since by the way its under the passenger sit.There is a lot stuff running off that battery check when it was changed 05 four years old its on it way out it cant hurt to try it and at least you can tick that box Yours Stew
 

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My Jetta diesel did exactly the same thing. It turned out to be air getting in around a couple of fuel hose fittings. Check all the fittings around the filter - look for cracks in the hoses near the clamps, replace any suspect clamps.

As far as the hood release is concerned, it sounds like the cable either broke or came out of the hood catch fitting.
 

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My Jetta diesel did exactly the same thing. It turned out to be air getting in around a couple of fuel hose fittings. Check all the fittings around the filter - look for cracks in the hoses near the clamps, replace any suspect clamps.

That's good advice if its a distributor pump tdi as they pull fuel from the tank. In normal conditions, a PD pushes fuel through the system so pulling air into the system is not as likely of an occurrence. If its a PD then I would suspect the lift pump getting weak (see link)

TDIClub Forums - View Single Post - Car won't start troubleshooting

more info
http://forums.tdiclub.com/showthread.php?p=2359761#post2359761
 

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I don't live where they're sold, so this is just for my curiosity, what is the fuel delivery system on the R5 TDI?
 

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All of that is not relivent with the R5 Tdi,
wow very helpful :clap:

the r5 is a pd system and has a low pressure lift pump from fuel tank to the pd system in the motor, there is no typical tdi diesel hp pump at all.

when it is not starting you could pull the fuel return line off the filter (and or the feed from tank) to check if fuel is there... you could could listen for fuel tank pump running with ignition on but not cranking...
 

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i've got the same problem on my v6 a while ago and spend more than AUD$1500 replacing unnecessary battery and fuel pumps which end up with no cure. the problem on mine was the pump didn't piming when i open the driver's door which all vw and treg does. finally found out was regulator went fault as it can not retain the fuel pressure and replacing for aud$250. what i suggest is, you have to let REPUTABLE vw dealer to check what the problem is before paid for any bills. from my experience they are reluctant to diagnose the problem simply ask you to replace this and that..(that's how they make money).
i've been through your situation and i know how embarracing which this luxury suv starts 30 sec which 1990 honda civic can starts right away.

hope you got your car fixed.
regards
 

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Discussion Starter #13
It's going in next week to investigate and the prime suspect does now seem to be air leak or fuel pump....
Let'ss hope it's the cheaper of the two eh?
Thanks for everyone who's contributed so far....
 

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if its any help ive checked with a friend whom works in VW dept and there has never been a failure reported on a fuel put in any R5 tdi, Think about it too, a fuel pump either works or it doesnt............
 

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Discussion Starter #15
that's a great reassurance Chester, thank you.
 

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Think about it too, a fuel pump either works or it doesnt............
Not so sure about this one. My MkII Jetta's fuel pump started making funny grinding noises and I had to crank it longer to get it to start. Replaced the pump and all my problems disappeared. Apparently it was a common fault on the MkII's.

The pump might give you a little warning before it conks out completely however, I still think it's a leak / air problem as parking it with the nose down seems to help.

Keep us posted on what the stealer finds...

PS. IMHO the R5 is bullet proof.
 

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Agreed, but that doesn't mean that an R5's pump won't necessarily give you a "warning" before it stops working completely. It depends on what's wrong with the pump. If it's electrical, it probably will just die on you. If it's the pump itself....?

In my case it was the pump, not the elecrtic motor.
 

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i can assure you Andriek it is NOT the fuel pump that is at fault, i'am an experienced mechanic and have been working on Vdubs for nearly 25yr and like i said before VW have not had a single case of a fuel pump on a R5.

watch this space my friend
 

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I'm not saying Spencer has a fuel pump problem. I'm saying he's got a fuel system problem, of which the pump is only one component.

Sounds to me like a fuel filter/pump/leak/pressure regulator problem, especially since gravity seems to solve it.
My argument is that, should you have a pump failure on ANY car, R5 or otherwise, the pump would not necessarily just stop working. Whether this is the case on Spencer's car remains to be seen.

The pump might give you a little warning before it conks out completely however, I still think it's a leak / air problem as parking it with the nose down seems to help.
I also seriously doubt it's the pump. I still believe he has a leak somewhere and air is getting into the system. When the nose is up, fuel drains back into the tank and air gets in. When the nose is down, the fuel can't run back to the tank so easily and it starts. This has nothing to do with the pump.
 
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