Anderzander Posted October 1, 2023 Share Posted October 1, 2023 My Td5 has developed intermittent boost on the turbo - sometimes it builds it really quickly and sometimes it’s just dead flat. As in foot to the floor and it just won’t build revs. Sometimes I can down shift to build revs and get some boost - and sometimes it will just suddenly build boost as normal. When it is on boost it seems as strong as ever. Nanocom is giving no faults. At first I thought the wastegate wasn’t sealing shut properly - but it actually seems to be moving really nicely. Unlike the Td5 discovery there is no solenoid in the actuator line - it’s just plumbed straight in. I did wonder if it could be the pipe work leaking or collapsing - but I can’t see how that would be inconsistent? Anyone help me what could cause it ? Quote Link to comment Share on other sites More sharing options...
steve b Posted October 1, 2023 Share Posted October 1, 2023 It could be an intermittent fault with the air flow meter - it does show symptoms just like that. Unplug it and try it , less top end but good pull away and if it's consistent then it's unlikely to be turbo related. Steve 1 Quote Link to comment Share on other sites More sharing options...
Anderzander Posted October 5, 2023 Author Share Posted October 5, 2023 Thank you for this Steve - you’ve fixed it. I did consider and (erroneously) disregard the AFM at the start of the issue. I’ve only ever had them just completely fail though, i.e go to zero reading - and whenever I plugged in the nanocom I was getting numbers in the right range. I wasn’t able to notice the intermittent issues in the pattern of the numbers - and I didn’t go back to it as it got worse (where I might have done). It’s so helpful to have fresh eyes to remove your own blind spots 🙏🏻 So it’s driving nicely with it unplugged - and I’ve a new one arriving in the post today. Thank you again Quote Link to comment Share on other sites More sharing options...
steve b Posted October 5, 2023 Share Posted October 5, 2023 No problem, have you gone genuine or OEM? I fitted an OEM to a D2 last year and it failed/lost calibration within 200 miles so this year on a Defender TD5 I went Genuine (6 months ago) and all is fine. Steve Quote Link to comment Share on other sites More sharing options...
Anderzander Posted October 5, 2023 Author Share Posted October 5, 2023 I ordered VDO which I’ve had good experience of … however it’s just been delivered and it’s not a VDO ….. Quote Link to comment Share on other sites More sharing options...
Anderzander Posted October 5, 2023 Author Share Posted October 5, 2023 Ahh - apparently it is still VdO https://www.continental-aftermarket.com/en-en/brands/vdo-is-now-continental Quote Link to comment Share on other sites More sharing options...
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