B5 a4 tdi 90hp 2000 won't start. Fault code 17656. Please help!!
Right. Where do I start. I recently purchased a 2000 a4 tdi 90hp with a snapped aux belt and broken tensioner, so I set about stripping out the old belt as it had wrapped around the bottom pulley, also the bottom timing cog.
After I had cleared the old belt, the engine turned freely so I tried to start it but to no avail. so I checked the timing and it had jumped, so I set the timing up and built the front end back up and tried to start it, it eventually started on easy start and it sat ticking over perfectly, I tried revving it gently and all was good so I went to set off for a run and the car drove superbly until I brought the turbo In, it boosted perfectly but when I let off, it spluttered and cut out!
It then wouldn't start for a while but eventually did, It sat ticking over perfectly but as soon as I tried to rev it over 3k ish it would cut out and take ages to start again. So I then took it home and changed the filter as it was due a service and I thought it might be clogged. After I changed the filter it won't start! At all! Even tried towing it but nothing, just smoke! I've had my mates vag com on and it said 17656 injection start regulation control deviation 18062 please check dtc memory of instrument cluster.
Can someone please help? I'm stuck now!
Much appreciated. Scott