johnny g Posted April 23, 2008 Share Posted April 23, 2008 Right, got a 54 plate 535d, 80k on it. Full BMWSH, yadda yadda yadda. When starting from cold (i.e. first thing in the morning - or after 8 hours outside work) it performs flawlessly, until I turn the engine off. Now, if I stop for for fuel/shopping/etc and switch it back on, I have no small turbo. There's no strange noise, just doesn't engage. If I get the revs up enough, the large turbo comes online, no problem and it flies, like it should. The only way I get the smaller turbo to work again is to leave it overnight or for a few hours. I left it for 3 hours last night and that wasn't long enough, but this morning, all was well. This has only manifested itself in the last 72 hours, there's no smoke, no warnings on the iDrive. I'm going away to Portugal for the weekend, so I've not booked it in with BMW yet, till I get back, but I was wondering if anyone knows what that is? Or what it only works after some period which is greater than 3 hours... Quote Link to comment Share on other sites More sharing options...
Wez Posted April 23, 2008 Share Posted April 23, 2008 Are you sure its not a single variable vane turbo thats stuck open when hot, its a common problem as they get sooted up. EDIT: my mistake, a little googling and it does indeed have a small and larger turbo in sequential operation Quote Link to comment Share on other sites More sharing options...
johnny g Posted April 23, 2008 Author Share Posted April 23, 2008 Are you sure its not a single variable vane turbo thats stuck open when hot, its a common problem as they get sooted up. EDIT: my mistake, a little googling and it does indeed have a small and larger turbo in sequential operation lol yep -- i know my cars Quote Link to comment Share on other sites More sharing options...
Thorin Posted April 23, 2008 Share Posted April 23, 2008 Junk all that sequential crap and fit a big single? Quote Link to comment Share on other sites More sharing options...
tbourner Posted April 23, 2008 Share Posted April 23, 2008 Well if it's actually got a small and large turbo, then it's completely different to the Supra seq system!! I'd imagine only a BMW person would have a clue what might be wrong!! Quote Link to comment Share on other sites More sharing options...
johnny g Posted April 23, 2008 Author Share Posted April 23, 2008 absolute pmsl - it's quick enough with its 550+lb/ft and there's no lag ... and it transitions better than the Supra stock twins... so no! Quote Link to comment Share on other sites More sharing options...
johnny g Posted April 23, 2008 Author Share Posted April 23, 2008 Well if it's actually got a small and large turbo, then it's completely different to the Supra seq system!! I'd imagine only a BMW person would have a clue what might be wrong!! Yep. will throw it in when I get back - just seeing if there were any clever people on here Quote Link to comment Share on other sites More sharing options...
michael Posted April 23, 2008 Share Posted April 23, 2008 Have you tried feeding £50 notes into the intake to see if that helps? Quote Link to comment Share on other sites More sharing options...
johnny g Posted April 23, 2008 Author Share Posted April 23, 2008 Have you tried feeding £50 notes into the intake to see if that helps? Would rather do that than give them to you Quote Link to comment Share on other sites More sharing options...
Alex Posted April 23, 2008 Share Posted April 23, 2008 I've seen this on other TDI's but don't know the cause... Soop Dogg/Angie has it on their Audi A6 1.9Tdi...(and that's it's only tubby of course). Assumed it was an age thang as that car has done 150k miles AFAIK. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 23, 2008 Share Posted April 23, 2008 Could it be a sensor youth? Maybe when its cold the resistance is normal but when its hot the resistance has increased and causes a fault? Dont know the layout so Im clutching at straws... Id probably say electrical cos if it was mechanical wouldnt it be fooked all the time? Quote Link to comment Share on other sites More sharing options...
johnny g Posted April 23, 2008 Author Share Posted April 23, 2008 Could it be a sensor youth? Maybe when its cold the resistance is normal but when its hot the resistance has increased and causes a fault? Dont know the layout so Im clutching at straws... Id probably say electrical cos if it was mechanical wouldnt it be fooked all the time? That's what I'm thinking as well, Craig. It could be a VSV-like device which is just not flowing. I'll bung it in and get it looked at next week... Quote Link to comment Share on other sites More sharing options...
johnny g Posted June 14, 2008 Author Share Posted June 14, 2008 Just to update, I've had this fixed - a few weeks back actually - it was a small piece of vacuum pipe that had chaffed a little. Replaced, and many torques are restored. If anyone's ever got this problem, it's under the engine cover, left side as you look at it. Quote Link to comment Share on other sites More sharing options...
michael Posted June 14, 2008 Share Posted June 14, 2008 *makes note for when I buy my retirement chariot* Quote Link to comment Share on other sites More sharing options...
johnny g Posted June 14, 2008 Author Share Posted June 14, 2008 fpmsl you sarcastic gheyer I was in Leeds today and you never answered your phone! Quote Link to comment Share on other sites More sharing options...
michael Posted June 14, 2008 Share Posted June 14, 2008 fpmsl you sarcastic gheyer I was in Leeds today and you never answered your phone! *checks phone* - one missed call, oops. I've been tinkering in the garage for most of the day so missed it ringing, apologies. Quote Link to comment Share on other sites More sharing options...
Guest zeddy Posted November 10, 2011 Share Posted November 10, 2011 hi there i was reading the problem you have on your 535d, i have exactly the same problem on my 535d, i was just curious to see if this problem has been fixed, i noticed you said theres a pipe or something like that could you please advise thanx Quote Link to comment Share on other sites More sharing options...
Scott Posted November 10, 2011 Share Posted November 10, 2011 That's some patter you had back then Johnny Quote Link to comment Share on other sites More sharing options...
dan294 Posted November 10, 2011 Share Posted November 10, 2011 hi there i was reading the problem you have on your 535d, i have exactly the same problem on my 535d, i was just curious to see if this problem has been fixed, i noticed you said theres a pipe or something like that could you please advise thanx The vac pipes under the engine cover are prone to going on these, as are the plastic T-Pieces that join them together. The vac pipes run along the top of the engine, but you need to take the plastic cover off first. Quote Link to comment Share on other sites More sharing options...
johnny g Posted November 10, 2011 Author Share Posted November 10, 2011 Exactly that. Remove the engine cover, on the left as you look from the front. There are some vacuum lines from the switching solenoids. Find the smaller turbo and trace it, there's been a fray/crack in it. Just replace that. Cost me about £3 Quote Link to comment Share on other sites More sharing options...
dan294 Posted November 10, 2011 Share Posted November 10, 2011 Exactly that. Remove the engine cover, on the left as you look from the front. There are some vacuum lines from the switching solenoids. Find the smaller turbo and trace it, there's been a fray/crack in it. Just replace that. Cost me about £3 Just had a 2005 535d in with this exact problem believe it or not!! Pipes run above where the DPF / manifold etc is so they get really hot and brittle, found a small black vac hose actually split in 2 on this one!! Interestingly Jonny, did yours flag a DPF fault P14A7 because of it at all? Did the throttle reset on this one too, accelerator pedal to the floor and then switch the ignition on and leave the peadl on the floor for 30-40 seconds, worked a treat! Quote Link to comment Share on other sites More sharing options...
johnny g Posted November 10, 2011 Author Share Posted November 10, 2011 Just had a 2005 535d in with this exact problem believe it or not!! Pipes run above where the DPF / manifold etc is so they get really hot and brittle, found a small black vac hose actually split in 2 on this one!! Interestingly Jonny, did yours flag a DPF fault P14A7 because of it at all? Did the throttle reset on this one too, accelerator pedal to the floor and then switch the ignition on and leave the peadl on the floor for 30-40 seconds, worked a treat! I never got a code, no. That's what caused me the headaches - but yea, as soon as it was fixed, we reset the throttle/'box and it was perfect for another 100,000 miles, till the turbos went at 180k miles. Replaced the turbos, still going strooonnnggg!!! Quote Link to comment Share on other sites More sharing options...
dan294 Posted November 10, 2011 Share Posted November 10, 2011 Wierd, the DPF code must be to do with something else then, it was a pressure related code. Car and an half though! Quote Link to comment Share on other sites More sharing options...
johnny g Posted November 10, 2011 Author Share Posted November 10, 2011 Wierd, the DPF code must be to do with something else then, it was a pressure related code. Car and an half though! I think the LCI version (>06) has more sensors than the pre-LCI model - could be it. Mine's and 05 car. And yea, it still shifts! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.