Hi all I've just joined the forum as I've recently purchased a 2002 Audi A4 1.9 tdi pd130, all was well for the first couple of weeks but now I'm having some issues. I recently had a wobble at idle so took it to a garage who advised me it had a misfire and recommended me the common injector loom harness replacement which had now been done with genuine parts but no better. They then advised me to remove the injectors to have them tested which I've done and they came back fine but now after refitting them back in it seems as the car just has no get up and go. I've removed them again and checked everything and it's all as it should be, I've also checked all the vacumn lines and replaced them for new ones in case there was any damage or one had come lose but nothing. Does anyone have any ideas on what it could be so I can actually get back to the original problem? Thank you in advance
1.9tdi help
- Thread starter Autovogue tdi
- Start date
No smoke at all, engine runs spot on its just hardly any power/torque since refitting the injectors.
I take it you set up the injector lash correctly when you reinstalled them?
Does sound like a vacuum issue though, so have you checked that you actually have vacuum?
Does sound like a vacuum issue though, so have you checked that you actually have vacuum?
Everything has been tried inc checking the vacuum. Hopefully will find out some more info tomorrow as its going on some specialist machine. Fingers crossed
Injectors rarely fail on these engines, the harness however does so that's what I would have changed first. On the diagnostics what do the injector balance figures look like ?.
Were new seals fitted when the injectors were replaced ?. did you re use all the original bolts for refitting the injectors.
You should really replace the seals as otherwise you can get issues with diesel in the oil. The small pinch bolts that secure the injectors are liable to stretch and snap. All the bolts under the rocker cover are torque to yield so stretch when used. The small bolts that secure the injectors are easy to snap.
Have you checked the cam lobes to make sure there is no wear on the cams, common issue on cars that haven't been serviced well or used the wrong oil.
when was the last time the fuel filter was changed ? . I presume the coolant temp sensor is good. EGR valve sticking won't help the idle either.
Were new seals fitted when the injectors were replaced ?. did you re use all the original bolts for refitting the injectors.
You should really replace the seals as otherwise you can get issues with diesel in the oil. The small pinch bolts that secure the injectors are liable to stretch and snap. All the bolts under the rocker cover are torque to yield so stretch when used. The small bolts that secure the injectors are easy to snap.
Have you checked the cam lobes to make sure there is no wear on the cams, common issue on cars that haven't been serviced well or used the wrong oil.
when was the last time the fuel filter was changed ? . I presume the coolant temp sensor is good. EGR valve sticking won't help the idle either.
As above the injector loom has already been done, fuel filters new, no wear on the cams or lobes and the egr valve has been total removed and cleaned. Engine ideals fine it's just very slow up the revs like there's no turbo. it's going to be put on a more specific diagnostic machine tomorrow so I'm hoping this will point in the right direction. Fingers crossed
mattyb6
Registered User
Sticky veins ?
Vacuum pump leaking?
Throwing any codes up?
If it isn't throwing any codes measure the injectors too.
Deffo check vacuum again, a mechanic put 2 pipes the wrong way round on mine and it basically had no turbo
Simple fix though, I replaced all my vacuum hoses with silicone too as the original was a bit tatty
Excess vibration could be a engine mount but not for it being down on power
Vacuum pump leaking?
Throwing any codes up?
If it isn't throwing any codes measure the injectors too.
Deffo check vacuum again, a mechanic put 2 pipes the wrong way round on mine and it basically had no turbo
Simple fix though, I replaced all my vacuum hoses with silicone too as the original was a bit tatty
Excess vibration could be a engine mount but not for it being down on power
sounds like you have disturbed one of the vacuum pipes so not getting any vacuum for the VNT on the turbo. Possibly a duff MAF sensor, or N75. MAP sensors can fail but these usually show up in diagnostics.
According to previous scans it's not the maf or map and there's vacuum, the acutuator rod is all moving as it should and the turbo wheel has no play or anything in it. It's confusing a lot of mechanics who have looked at it.
Yes all pipe work has been checked and double checked, air flow metre has been unplugged and tried but no better and even tried a brand new one still no better.
No haven't tried that, it's been stuck down the garage for the last 2 days and no further forward as of yet.
Nothing back from the garage yet im just being told it's being tested, struggling with only 1 car in the household at the min even had to use pedal power a couple of times.
Tell me about it wish I had a vag-com set up myself to diagnose the problem as it would of been fixed by now with none of the headache and wasted expense. Fingers crossed that I get some news soon
Well just had diagnostics back and there saying it's the vacuum pump, fingers crossed it fixes it as there not cheap to replace and I could do with out wasting anymore money.
Cant see it being that really.and its a mechanical part,diagnostics wouldnt cover that part i dont think.and you will have other issues like brakes.
Just a thought.what type of hose did you use when replacing?
Not sure if theres enough Vac there to collapse your new hose,try your old hose.
Just a thought as i know it can be very frustrating.
Keep us updated as i have the miss aswel.
Ive had new
Tandem Pump
INJ Harness
Egr delete
Remap
Idle adjustment
Complete service x2
Many fuel/injector cleaners
Diesel purge with liqui moly
Intake strip and clean.
My timing is out by 1+ degree im yet to do it.pretty sure it wownt solve anything.
But if youve just or recently had the cambelt done its worth checking.
The lack of power is id say is something youve done in the process of eliminating the knock.
so go back check all that before you look any further for this knocking/miss.shake on idle.
Did you check the injector bores for wear? thats a common issue.
Also the PD engines are well known for this shakey idle/smokey startups and smokey underload.
Ive given up on mine.
Its drives fine returns 50+mpg
and performs brilliantly
Not sure if theres enough Vac there to collapse your new hose,try your old hose.
Just a thought as i know it can be very frustrating.
Keep us updated as i have the miss aswel.
Ive had new
Tandem Pump
INJ Harness
Egr delete
Remap
Idle adjustment
Complete service x2
Many fuel/injector cleaners
Diesel purge with liqui moly
Intake strip and clean.
My timing is out by 1+ degree im yet to do it.pretty sure it wownt solve anything.
But if youve just or recently had the cambelt done its worth checking.
The lack of power is id say is something youve done in the process of eliminating the knock.
so go back check all that before you look any further for this knocking/miss.shake on idle.
Did you check the injector bores for wear? thats a common issue.
Also the PD engines are well known for this shakey idle/smokey startups and smokey underload.
Ive given up on mine.
Its drives fine returns 50+mpg
and performs brilliantly
He showed me he hose that goes into it and it's lose as hell but it always has been (I think someone has messed with it in e past), apparently when he done a vacuum test its losing it on boost which is apparently why the turbo isn't doing as it should. I think I'm going to try and source a good used one first and if it cures it then buy a new one but me going out and spending £250 ish online or £350+ from local motor factors is too much of a gamble. Fingers crossed
That sounds like the thickish one going into the servo.Another common issue lol
Mine was the same very loose but never effected the car.
Mine leaked diesel.
I bought a pierburg one new £250.
Your going to have to bite the bullet im afraid,and get a new one.else you will be kicking yourself if its the same.
Its an easy job to do aswel.just the bottom bolt is abit fiddly,well with my fat fingers lol.
If the turbo isnt working right,that may not be the reason.have a look on here for sticky veins.
get it cleaned.
http://www.ebay.co.uk/itm/VW-1-9-TD...291?pt=LH_DefaultDomain_3&hash=item20fc74992b
It will come with a new gasket aswel.
Mine was the same very loose but never effected the car.
Mine leaked diesel.
I bought a pierburg one new £250.
Your going to have to bite the bullet im afraid,and get a new one.else you will be kicking yourself if its the same.
Its an easy job to do aswel.just the bottom bolt is abit fiddly,well with my fat fingers lol.
If the turbo isnt working right,that may not be the reason.have a look on here for sticky veins.
get it cleaned.
http://www.ebay.co.uk/itm/VW-1-9-TD...291?pt=LH_DefaultDomain_3&hash=item20fc74992b
It will come with a new gasket aswel.
Well vac pump replaced and no difference 
I phoned the chap who done the diagnostics which I paid for and he's having it back in. Getting a bit fed up now and need to get it sorted asap
I phoned the chap who done the diagnostics which I paid for and he's having it back in. Getting a bit fed up now and need to get it sorted asap
try Mr muscle over cleaner in your turbo .. Unscrew the lamba prob near the turbo and get some small pipe then feed it to the hole making sure it goes to the turbo and squirt leave it for a good few hours to do its stuff then pop lamba back in and start it up
Right after the garage having a play and strip down they have installed a set of the 170bhp injectors and since it's back together we now have boost but yes there's a but the idle is up and down a bit. Has anyone ever put the 170bhp injectors in a 130bhp? they seem to think that a remap will sort out the idle as the standard map isn't good enough for the larger injectors
Good luck finding a remap that will work with your ECU and have correct duration and start of injection maps...
Jimmy TDI
Pro Tinkerer
Forget the 170 injectors the bloke in the garage told me wrong there the 150 injectors which are exactly the same as the 130 injectors. Now have a chap booked in for Monday to do a map on it to hopefully sort the minor issue fingers crossed
