Right as the title says I'm nearly at the end of my patience with this fault on my 8l s3 now. As some of you will know i put a rod through the block last year on my old engine, i sourced a second hand engine, took it apart rebuilt with IE rods, added a few mods and Bill @ badger 5 mapped it in October and it has been great.
A couple of months passed with me enjoying the car thoroughly. Then just before Christmas the car started to struggle to start, then when eventually it did after 4-5 tries and feathering the accelerator i got a fault light. Plugged in the v-gate scanner and a mates vagcom and i has the cam position sensor fault. So i sourced a new genuine cam position sensor, installed it, whilst i was at it i changed the fuel pump for a new one as that was tired too and made sense to do them at the same time. No change, still struggles to start. So i have had the timing checked as we did a cam belt change during the rebuild. It was fine. It also had new spark plugs, 2.0 tfsi coil packs and a new crank position sensor as i read this can trigger the fault too. I must admit when the car is running and taken for a drive, its drives perfectly with a good idle, pulls strongly through all gears with no hesitation. Im stumped!!!! the last thing i can check is the cam chain and the spacing between which i am going to do this weekend. If i was to go and start the car now it would turn over and pop and bang out of the exhaust, then about the 4th time would splutter into life. Fuel filter has been changed recently too.
I thought i would post this up as the forum has always been a great place and helped me out a lot and is worth a shot just in case someone else has by any chance had the same issue.
Thanks in advance.
Adam P
A couple of months passed with me enjoying the car thoroughly. Then just before Christmas the car started to struggle to start, then when eventually it did after 4-5 tries and feathering the accelerator i got a fault light. Plugged in the v-gate scanner and a mates vagcom and i has the cam position sensor fault. So i sourced a new genuine cam position sensor, installed it, whilst i was at it i changed the fuel pump for a new one as that was tired too and made sense to do them at the same time. No change, still struggles to start. So i have had the timing checked as we did a cam belt change during the rebuild. It was fine. It also had new spark plugs, 2.0 tfsi coil packs and a new crank position sensor as i read this can trigger the fault too. I must admit when the car is running and taken for a drive, its drives perfectly with a good idle, pulls strongly through all gears with no hesitation. Im stumped!!!! the last thing i can check is the cam chain and the spacing between which i am going to do this weekend. If i was to go and start the car now it would turn over and pop and bang out of the exhaust, then about the 4th time would splutter into life. Fuel filter has been changed recently too.
I thought i would post this up as the forum has always been a great place and helped me out a lot and is worth a shot just in case someone else has by any chance had the same issue.
Thanks in advance.
Adam P