Power loss

[Toledov5boy]

Wondered if anyone could help? I recently posted about the power loss and delay with my 02 plate v5. I was advised that it might be the maf sensor so have had this changed which has had no affect. Anyone reckon its worth trying some new plugs and HT leads?? Or if not if anyone has any input It would be much appreciated. Thanks

 

[kewe]

This has been going on for quite a while mate you must be getting very hacked off

Only things that usually go wrong are MAFS, Coilpacks and Lambda Sensors.
No HT leads are on the 170BHP Models.

Did you ever manage to get it on VAGCOM? Either that or get it in to a VAG specialist for a 2nd opinion.
Until you can pinpoint it with this you're poking around in the dark as to what it may be.

PS - Have you tried the V5 forums? Lots more V5 people there that may be able to help:

http://golfv5.co.uk/phpbb3/

 

[cookie1978]

Does the ecu store fault codes even if the problem has been fixed on the vag motors? I know others i have worked on stored the codes and the ecu would stay in safe mode till cleared of the codes.
Id get it on vagcom see if there are any codes.

 

[Toledov5boy]

coils

When u say coil packs Im guessing u mean ignition coils and by vagcom u mean diagnostics?? Sorry but thats why I joined this site cos Im pretty clueless!! Help lol

 

[kewe]

Yep coilpacks (ignition coils) sit on top of the spark plugs and are prone to dying. Usually you get mangement warning light, feels like it dropped a cylinder running very rough in limp mode. Also smell of burning and unburned fuel in CAT.

Vagcom is a diagnostic tool yes. You can download a free limited software version to read faultcodes and get a lead on auction sites for about £12. You will need a laptop to run the software and plug the lead from the laptop usb port into you cars diagnostic port situated under the ashtray.

There's a section on this site dedicated to Vagcom, you might find someone near you already has it and can run it on your car - worth checking first.

 

[Toledov5boy]

sweet

Cheers kewe. Ur coil pack symptons are exactly what im getting. The burning aswell has scared me into thinking I had a poorly head gasket! I can buy them in sets of 5 I take it? What sort of price am I looking at? Would ebay maybe have some?

 

[Slimy]

You're right on both counts. Do any reading on virtually any recent VW/Audi engine and coil packs will show themselves as a consistent fault. It seems to be 'one of those things'. I now carry three spare in a box instead of a spare tyre, because I reckon the packs will fail before I get a puncture!!

In order to correctly diagnose which one is at fault, you really ought to get yourself a cheap VAG-COM lead and the trial version of the software. At least then you'll be able to retrieve and reset the fault codes. The fault codes do stick around in the unit, even if the ECU light doesn't come on. Its either that or pay £30 a time for a VAG dealer to get the code for you.

I have found by bitter experience that the V5 engine will actually run perfectly smoothly on three out of five cylinders, and at the time it went wrong I had to do a 60 mile journey home at 70mph! I guess its something to do with the staggered ignition compared to the 180 degree firing of a more traditional inline four. The only sign you'll get is a very slightly uneven running, and the need to really put your foot down to get anywhere.

I paid about £12 for an Ebay lead that came with an old evaluation version of VAG-COM, I would recommend you start there. They really are so easy to use, the fault codes even specify which cylinder you should be looking at!

Edit: Looks like Kewe beat me to it, so most of this is a duplicate!! Oh, don't bother replacing all five, find out which ones are faulty and save the rest until they actually go faulty. They really are so unpredictable, even replacing them with new ones won't guarantee that they'll work.

 

[Toledov5boy]

.

cheers slimy. Tell me if im talking nonsense but couldnt I just buy a single coil and replace one at a time and check that way?

 

[kewe]

Also the AA cary them around in their vans

 

[Toledov5boy]

vag

Is this ross tech vag com what I have to download??

 

[kewe]

Is this ross tech vag com what I have to download??

Yes I think the one you want is 311.2

http://www.ross-tech.com/vag-com/download/archives.html

 

[Toledov5boy]

Its got them with the software on ebay but only 409.1

 

[kewe]

Its got them with the software on ebay but only 409.1

I think that's OK as well.

 

[Toledov5boy]

sorry

Sorry for all the questions m8, been a frustrating couple of months for me. Is there any way round not using the vag like using the one pack and try it as a replacement for each one?

 

[kewe]

Hey don't apologise, we've all been there and know how frustrating it is when the car ain't running right.

The worry I would have if you don't use Vagcom is you may end up buying bit by bit and spending more money than you need to. You've already relaced the maf i think and it wasn't that. What if it turns out not to be the coilpack or what if more than 1 coilpack is faulty?

For the sake of £14 it's worth having vagcom to try and narrow the problem down i believe, but of course the choice/gamble is yours.

btw - When one of my coilpacks went i was advised to replace all 5, there's a good chance when one goes, the others will go soon after.

 

[Toledov5boy]

.

Thanks m8. ok last question so can I get the packs in a full set of five then and if so do u know where I could find some? Yh Im defo gonna invest in the vag com, seems a bit complicated but that may just be me being a bit slow Thanks for all ur help anyway!!

 

[kewe]

I think you have to buy the coilpacks individually - try Eurocarparts.

Maybe try pm Slimy, I think he just recently bought one from here?

 

[Slimy]

GSF also carry them, but when I was looking for them (about a month ago), I couldn't find them anywhere. You should also consider the VAG dealers, as they're only a couple of pounds more expensive direct from a dealer (£31 as opposed to £29). As you can see, a full set of five isn't cheap wherever you go! Don't go cheap though, there is a 'fake' that GSF sell thats about half the price or something, but they're not worth the hassle.

It will be difficult to just swap them out one at a time, partly because the engine will run fine with less than a full set, but also because disturbing the coil packs may actually make them faulty! I reckon it was my spark plug change that started mine failing.

One big warning that I've found from another post somewhere (possibly the V5 board?). It is absolutely essential that you DO NOT TWIST the coil packs as you remove them or insert them. They HAVE to go straight in and straight out, otherwise they will weaken and possibly fracture. My first coil pack replacement was because I removed one by giving it a 'twist' to loosen it, and it actually broke internally. By the time I got the pack out the bit that connected to the spark plug could extend by about an inch out of the coil pack housing!! There is an official tool to remove them, but I didn't quite go that far.

And one last point. There have been at least a dozen variants of the coil pack, all with the same part number but a different letter suffix. Try and get the latest possible, I think its M or N? There was a note somewhere that the 'C' variant used to catch fire so avoid them at all costs. Of course, you might find the ones you're running are 'C's!!

Edit: do a search on Ebay for the coil pack part number 022 905 100 N.

 

[ironside]

Hi v5 boy,

a quick way to test individual coil packs is with the engine ticking over (which will prob be uneven due to the prob),remove engine cover and disconnect coil packs one at a time,if the engine runs worse then that paticular coil pack is usually ok,if it stays the same then that is usually the culprit,you will need to clear the error codes eventually using vag com or a local garage -but at least this is a 5 min job to see which if any coil packs are faulty,providing you have the 170 v5 (no ht leads running over the engine cover) you are only touching low voltages with the coil packs ,just keep everthing clear of moving pullys ,belts etc..!

Hope this helps

Dave

 

[Slimy]

Ironside, I actually had trouble diagnosing it like that. I had the engine idling with a slight misfire, so I pulled the first coil pack. No change in engine tone, so I thought yay, first time! Then I put the first one back in and pulled the second, and still no change in engine tone!!

Turns out the first one was well and truly broke, but number two was fine (and still is). And I was able to completely remove two coil packs and the engine would still idle, albeit with a very slight rhythm to it.

In the end I got VAG-COM working, and it told me what I already knew, but it was the first port of call when I got the second one failing (coil pack four if I remember rightly). It was so much easier to just look at the fault codes!