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

Have you tried scanning for error codes? That would be a good place to start and could point you in the right direction?

There's no codes showing

a shot in the dark maybe that their is an air leak between the maf sensor and the engine.

 

So maybe with the air leak then too much air getting in to the engine to what the MAF sensor is letting on.

 

Total shot in the dark but worth checking the intake for leaks, splits or gaps.

 

The only thing i can imagine that would not give an error code.

Every pipe has been checked and checked agin if not replaced, I'm hoping it's a simple fix as its dragging out for so long now and I'm getting a little fed up of replacing parts that makes no difference.

I see you have already replaced the injector wiring loom but have you already replaced the injectors themselves as this is a common problem?

I see you have already replaced the injector wiring loom but have you already replaced the injectors themselves as this is a common problem?

No I haven't actually replaced the injectors as they were working fine before they were removed, I mentioned to the garage if it was possible if one got dropped or damaged in any way to make it drive like it is and they have guaranteed me 100% that the injectors would not cause the current problem

No I haven't actually replaced the injectors as they were working fine before they were removed, I mentioned to the garage if it was possible if one got dropped or damaged in any way to make it drive like it is and they have guaranteed me 100% that the injectors would not cause the current problem

 

 

Ah ok, that was the only other thing I could really think of off the top of my head as I've heard about injectors failing many times and Audi selling them very regularly!

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.

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.

 

I know what you mean! Keeping my fingers crossed for you. Let us know how you get on!

How much is that setting you back this time by the way?

Well pump replaced and still no different, now has to go back to the chap that I paid to diagnose it. Starting to get a little annoyed with it now as I just want a car I can get in and drive.

Well pump replaced and still no different, now has to go back to the chap that I paid to diagnose it. Starting to get a little annoyed with it now as I just want a car I can get in and drive.

 

I feel your pain... there's nothing worse that having a fault you want to fix but you can't find, and then having to throw money at different parts that aren't needed 

 

Let us know how you get on when it goes back.

Well they have it back now and are totally taking it apart so fingers crossed it will get fixed and I can't wait to find out what actual part is causing the problem.

Any luck with this yet Chris?

 

I bet it's some silly small part that you would never even think of!

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

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.

How did the remap go Chris?