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Posted

Car: 2001 Galaxy Tdi 115.

 

Symptoms: Loss of power at low revs, to the pont of stalling.Car "hangs back" as if fuel not getting through then starts shaking in 2nd gear. Not so bad in 3rd, awful in 4th however if you accelerate to 3000 revs shaking stops until speed/revs drop again. Symptoms gradually getting worse, used to be 1 in 5 trips bad, now 4 in 5, but it doesnt do it every time and when it doesnt car runs fine with power and turbo working??. Getting fed up of driving round in 3rd gear!!.

 

Already tried: Replaced Maf (Bosch one off ebay, looked original came with end caps etc,but I'm starting to wonder now), Replaced Map(again off ebay but I know this definately works). Had full service. Have just got a Vag-Com of ebay and am currently trying to scan car, (thanks very much for the sticky came in very useful in setting it up) so hopefully I may have some fault codes soon.

 

If anyone can please give me any other pointers or suggestion I would be very grateful as it's doing my head in now. I've read loads of threads on here with similar symptoms DMF, sticky vanes,MAF, Map just don't know where to start. I'm really hoping it's just a crap MAF I've fitted, would it show these symptoms?, as if it's anything major (gearbox etc) then the car is toast as I just haven't got the money :22:

 

Thanks for reading any help very gratefully received :lol:

Posted
Hi Chris, thanks for the reply, I've just got a vag com lead and I'm still trying to fathom it out, recognises the computer port and the car just won't run the programme, it keeps shutting down?. As soon as I get it running I'll post the codes, think there may be a few :lol:
Posted

Well the codes will certainly help :lol:

 

However, please define "Full service" - I've seen some people who think a "Full service" is simply the oil and a filter so can you state what exactly was changed? :22:

Posted
Hi Mirez, the service was, new fuel filter, air filter and oil filter, oil change, brakes checked, the car did run a bit better in the week following so I was hopeful that the oil change had done some good, but it soon went bad again.
Posted

Hi Mirez, the service was, new fuel filter, air filter and oil filter, oil change, brakes checked, the car did run a bit better in the week following so I was hopeful that the oil change had done some good, but it soon went bad again.

 

 

Hummmm, well the common two for the kind of issue you are describing would be fuel filter and air filter. I can't see the MAF having such a pronounced effect, they normally cause a feeling of slugishness (like driving without a turbo) but I've not heard of one causing a shaking sensation - there are a couple of other sensors that could cause that kind of issue though so would be good to get some codes - when you get to 3K is there still this loss of power or is it all ok at the top revs?

 

Where abouts are you based? There maybe someone local who can scan the car for you...

Posted

Thanks Mirez, no the power stays the same, great acceleration in 3rd and 4th, shakes in 5th and then keeps shaking if I let the speed and revs decrease. It only lacks power in 1st and 2nd eg, pulling away at junctions, then it threatens to stall and has done on occasion. A couple of other things to note I have noticed my front tyres squealing more than normal, as if they can't cope with the power. Also we had a small oil leak a while back, again don't know where from but that hasn't re-occurred.

 

I'm near Blackpool in the North West if anyone can help.

Posted
Just to add, I've tried it with the Maf disconnected, the shaking remained the same, I just had absolutely no power, people were staring at me lol. Also the shaking is REALLY bad, just like driving over a cattle grid, the only way I can continue driving is to drop down the gears and acclerate again, it's driving me nuts!,the stupid thing is the power is there?
Posted
Well I've managed to get the VagCom running and it's talking to the car!, the problem now is I keep getting the message "Too many errors to communicate" but apparently my ABS is fine lol!. Is it just a crap cable or does someone know a way around it?. Please help!!!.
Posted (edited)

Yes I had that problem when I first had mine, tried uninstalling and reinstalling just the same, it was also very slow running the program.

In the end wiped off the hard drive reinstalled windows and everything else and it's been fine since that.

By the way you cant run autoscan unless its registered, you have to scan each module separately.

Edited by chrispb123456
Posted (edited)
Hi Chris, yes it's also running very slowly, I'm just trying to find out how to lower the "latency" to 3 (found on a thread on here) to see if that helps. I've only recently done a full reset so I've not got much to lose if I have to do another one! been doing this all day now :( Edited by brethy
Posted
Latency, get into device manager double click on COM & LPT then double click on the com number what ever yours is 1-4. COM properties opens click on port settings then advanced then you will see the latency setting. 16 is default reduce it to 3
Posted
Thanks Chris, found it and changed it to 3, I'll give it another go tomorrow and see if I can get any further, just had one of those rare trips where it ran lovely, plenty of power, no shaking, reminded me how it can be :(
Posted

Quick update, I've been running the kids to school this week and the first trip of the day the car is truly awful, mega shaking, no power, terrible mpg and sounds worse than a tractor :rolleyes: However upon dropping off the youngest where the car stands for 5 mins or so then the next trip is fine, power, no shaking in any gears, mpg back up, it's like driving a different car. Surely if something major has gone, gearbox etc, it would be bad all the time, not intermittently??.

 

So, could it be realated to the cars temperature?, once it gets up to 90 deg I seem to get normal driving. The other things I've been thinking of are fuel injectors, if they are clogged would this cause these symptoms? I've just got some Millers power sport 4 to try and see if it helps. Also EGR valve if it's filthy (more than likely) would this cause these problems and how easy is it to remove and clean, bearing in mind I am a helpless female :o I forgot to say the car has done 138,000 miles if that's relevant.

 

Any comments or suggestions gratefully accepted, pleeeaaase :(

 

Ps Am still getting to grips with the Vagcom, will post any results I may get, if ever lol

Posted

Thanks Chris, one more thing to think aout lol. Definately think it's temperature related, I've been watching it closely today:

 

Car started from cold = lots of shaking, no power, runs terrible.

 

Car brought up to normal operating temperature, switched off and back on again = no shaking, full power, runs and sounds perfectly normal?.

 

So, could it be the temperature sensor, would this show these symptoms?, or does anyone have any other ideas?

 

Thanks ever so much :rolleyes:

 

Ps I've put the Millers power sport 4 in as well so I'll see if it makes any difference.

Posted (edited)

I'd agree with Chris that the injector loom/injector connections are the prime suspect. I wouldnt have thought these show up on VAGCOM afaik.

 

Faulty sensors such as MAF, MAP and temp cause power loss but not rough running (usually).

Edited by seatkid
Posted

Well done Chris and Seatkid, managed to get vagcom running and the fault is 18074 PD Unit Injector, cylinder 1, electrical malfunction. I've been on the Ross Tech website and found the fault code and it says "wiring or connections to/from the valve for pump jet, check wiring etc. It also says replace the wiring harness before any injectors, am I right in thinking this is the injector loom?, also do you know roughly how much they cost.

 

Many thanks for all the help (and for the telling off Chris :) )

Posted (edited)

Thinking your injector wiring loom may have some dodgy connections this should show up on Vagcom when you get it running.

i agree

after reading the symtoms it sounds like it is only running on 2 cylinders on occasions! petrol engines give the same if you loose a plug or two. I have not had too much experience with diesels but this looks to me to be the problem.

 

The No1 injector controls the other 3 so if 1 has a fault the other 3 will have a fault

 

I detect your frustration but you need to troubleshoot the problem correctly not just pull plugs off or replace units etc.

 

Running with the MAF disconnected was a really BAD idea you could end up doing more damage than you are trying to fix, modern diesels need some essential electronic devices to run the MAF unit is a key component and as you have seen costs a lot of wonga, likewise the injector harness / system is also a key component and VERY tricky to fix.

 

I don't know your circumstances but is there no one in your family or friends who can help ? also not ALL garages are rip off merchants again get some advice mate before you blow a fuse or blow your engine !

Edited by Amarok
Posted

Hi Amarok, thanks for the reply. I appreciate your concern but just to put your mind at rest the Maf and Map were changed last year in response to specific fault codes identified by my mechanic. It's not just a case a case of me changing things willy nilly :)although I did try disconnecting the maf just to see if it affected performance. This running rough is a separate problem which has only become really bad in the last month.

 

I will be getting my mechanic to check the wiring loom and injectors to see if this is the cause of the problem, and replace if required. I just needed to be able to narrow the fault down before committing to having the work done. Times are hard, in an ideal world I would just put it in a main dealer and say find the fault and repair it, but unfortunately I've not won the lottery this week (again!) :)

 

I'm just so grateful for this site, it's given me lots of help and information.

 

Thanks

 

Donna

Posted

Just to clarify

 

As yours is a PD unit injector engine amarok's comment about no.1 injector controlling the other injectors does not apply - (that is the pre 2000 Tdi engines with conventional distributor pump and a lift sensor on no.1 injector)

 

Running with MAF or MAP disconnected will not damage your engine, it just means the ECU defaults to extremely conservative settings which severely restrict power output to ensure emissions are not exceeded.

 

The injector loom problem is just the VW old problem of substandard cable that their suppliers keep on supplying. They save 2p and in return give cables which the insulation goes brittle exposing cores that then either short or oxidise and break.

Posted

Many thanks Seatkid, that's a bit more reassuring, I was worried I may of made things worse. I've been quoted

  • 1 month later...
Posted

Car: 2001 Galaxy Tdi 115.

*UPDATE*

Symptoms: Loss of power at low revs, to the pont of stalling.Car "hangs back" as if fuel not getting through then starts shaking in 2nd gear. Not so bad in 3rd, awful in 4th however if you accelerate to 3000 revs shaking stops until speed/revs drop again. Symptoms gradually getting worse, used to be 1 in 5 trips bad, now 4 in 5, but it doesnt do it every time and when it doesnt car runs fine with power and turbo working??. Getting fed up of driving round in 3rd gear!!.

 

Already tried: Replaced Maf (Bosch one off ebay, looked original came with end caps etc,but I'm starting to wonder now), Replaced Map(again off ebay but I know this definately works). Had full service. Have just got a Vag-Com of ebay and am currently trying to scan car, (thanks very much for the sticky came in very useful in setting it up) so hopefully I may have some fault codes soon.

 

If anyone can please give me any other pointers or suggestion I would be very grateful as it's doing my head in now. I've read loads of threads on here with similar symptoms DMF, sticky vanes,MAF, Map just don't know where to start. I'm really hoping it's just a crap MAF I've fitted, would it show these symptoms?, as if it's anything major (gearbox etc) then the car is toast as I just haven't got the money :(

 

Thanks for reading any help very gratefully received :blink:

 

**I have today finally managed to scrape the pennies together to get the wiring loom replaced. Got the new loom from VW

Posted
thats great news,glad things have now been sorted out.

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