Ska Posted May 20, 2006 Report Share Posted May 20, 2006 Top her up to about 1/2 a tank and see if she starts Link to comment Share on other sites More sharing options...
SneakyMcC Posted May 20, 2006 Author Report Share Posted May 20, 2006 Ok, but she fails to start may be 1 in 20 starts? Link to comment Share on other sites More sharing options...
SneakyMcC Posted May 21, 2006 Author Report Share Posted May 21, 2006 [ QUOTE ] Re: no fuel problem HELP PLEASE [Re: kersley] Edit Reply Quote Quick Reply I tried calling you but no answer; If the AA man did a check on the fuel pump (hopefully he lifted the panel on the boot floor and tried a direct live feed to the terminals of the fuel pump), and says it responeded then it could be either the relay (simple fix), blocked fuel filter (resonably easy fix) or the sender unit and corregated pipes inside the fuel tank (nightmare fix- better to get second hand fuel tank and replace). The last one was my problem even though fuel gauge was registering about 1/2 -1/3 full the car would not start up. Thats because there is a seal on the sender unit that goes bad and or one of the corregated pipes that suck fuel from the corners of the tank split; this then causes air bubbles and fuel starvation. I had my fuel tank replaced. But for you I would suggest first looking at the level of the fuel gauge is it about 1/2- 1/3 full and not starting if so then you have the same problem as mine and you'll need a new tank including the sender unit which hasn't benn removed from it beacuse the seal is a nightmare to get right. second replace the fuel pump relay and se if that makes a difference. third check and replace the fuel filter its in front of the rear passanger wheel inside a flap. If you need any more help just give us a shout READ THIS MAY HELP TSN link Edited by Ska (20/05/06 04:53 PM) [/ QUOTE ] Thanks Ska, this is from another thread. Are there additional checks I can do to reconfirm I have the same prob? Link to comment Share on other sites More sharing options...
Ska Posted May 21, 2006 Report Share Posted May 21, 2006 1 in 20 start heh? Sounds like a problem that my Ford galaxy has had (we all know its a VAG machine before you guys say anything), the cause is the relay that runs the ignition electronic a tell tale sign is how hot it got, I'll have a dig and see where its at in the 8 But so far as the tank thing is concerned the only other way is to dismantle the fuel rail (not reccomended- just top her up to 1/2 tank and see what she does)the seal breaks as shown on the pic, this sits on a moulding inside the tank and when it goes bad cant suck fuel into the accumilator (that big orange thing so car stalls at just under 1/3 of a tank and wont start until you top it up passed that seal level Link to comment Share on other sites More sharing options...
SneakyMcC Posted May 21, 2006 Author Report Share Posted May 21, 2006 [ QUOTE ] 1 in 20 start heh? [/ QUOTE ] 1 in 20 fails to start, in fact, its more it might cut out 1 in 20 starts.... Link to comment Share on other sites More sharing options...
Ska Posted May 21, 2006 Report Share Posted May 21, 2006 Oh sorry, then I doubt theres anything wrong with your tank if your regularly using up the fuel to the red then topping her up again. VAGcom m8 you need to get it diagnosed I'm still looking for that igntion relay though. And what about the starter inhibitor relay? Link to comment Share on other sites More sharing options...
SneakyMcC Posted May 21, 2006 Author Report Share Posted May 21, 2006 [ QUOTE ] I'm still looking for that igntion relay though. [/ QUOTE ] Is this for mine or your 8? [ QUOTE ] And what about the starter inhibitor relay? [/ QUOTE ]Would this cause the yellow imob/light to come on? Thanks Ska, keep the idea's flowing Link to comment Share on other sites More sharing options...
SneakyMcC Posted May 26, 2006 Author Report Share Posted May 26, 2006 Didn't want to start again today. The mill was cold, could there be a 'choke' type prob? Link to comment Share on other sites More sharing options...
ronmcl Posted May 26, 2006 Report Share Posted May 26, 2006 Sneaky, on the ocassions that it won't start, when it does eventually get going how does it sound?... Does it just suddenly start and run normally or does it splutter a bit first? Any smoke when it gets going? Is it more or less likely to cut out again when it's struggled to get going or does that happen even when it's started first time? Link to comment Share on other sites More sharing options...
SneakyMcC Posted May 26, 2006 Author Report Share Posted May 26, 2006 [ QUOTE ] Sneaky, on the ocassions that it won't start, when it does eventually get going how does it sound?... Does it just suddenly start and run normally or does it splutter a bit first? [/ QUOTE ] It doesn't just catch, it gradually starts to catch. Thats why I thought a feul prob. But that could be the same for it not doing the equivelent of putting on the choke. But it did in ast night too, whilst hot. [ QUOTE ] Any smoke when it gets going? [/ QUOTE ] Nope!...Well I'd better check? (another good TSN thought). [ QUOTE ] Is it more or less likely to cut out again when it's struggled to get going or does that happen even when it's started first time? [/ QUOTE ] If it starts first time, then its fine. When it struggles you still need that extra bit of key cause it feel like it wont run. But yest I gassed it up a bit to see if that got her running.... The car is grossly over due a service (Jan/Feb 06). I have some more money in now, so I better get her serviced. Link to comment Share on other sites More sharing options...
showtime Posted May 26, 2006 Report Share Posted May 26, 2006 in most cases with fuel injected cars when they wont fire up from cold its the coolant temp sensor reading too hot or not at all, without a signal the injection computer go's onto a hot default which will give reasonable fuelling when driving the car once warm! like any cold engine they need a richer fuel mixture to start but once running will run fine, repeated prolonged attempts to start the engine actually get enough heat in it for it to splutter into life its certainly worth checking this, if you have access to diagnostic equipment you can read the coolant temp & see how far out it is Link to comment Share on other sites More sharing options...
SneakyMcC Posted May 26, 2006 Author Report Share Posted May 26, 2006 Top tip Showtime. You aint been here 5mins, but y'all be showing true TSN class already! Very glad to have you onboard the good ship TSN Fanx m8! Link to comment Share on other sites More sharing options...
SneakyMcC Posted May 26, 2006 Author Report Share Posted May 26, 2006 I fink I'll pop into one of the local stealers and get the fault codes read..... Link to comment Share on other sites More sharing options...
showtime Posted May 26, 2006 Report Share Posted May 26, 2006 i'll help out where i can, 22 years in a main stealers workshop should have taught me something i'm a new Audi owner after admiring them for a few years now & i'm loving the S8 but my workshop experience is pretty much all Renault based BUT the good thing is most cars use pretty much the same techology in pretty much the same way & the common faults are usually suffered by all manufacturers as the parts that fail are often shared the main 3 things that an injection system needs to run an engine are - crankshaft postion/speed coolant temperature manifold pressure/vacuum obviously there are many more sensors like throttle potentiometers, camshaft sensors etc to determine the exact firing order for sequential injection that provide much more information & enable a far more versatile & accurate fuel map but those 3 are the core elements to pretty much any petrol injection system & without one of those it just aint gonna happen edited for typo Link to comment Share on other sites More sharing options...
SneakyMcC Posted May 27, 2006 Author Report Share Posted May 27, 2006 [ QUOTE ] the main 3 things that an injection system needs to run an engine are - crankshaft postion/speed coolant temperature manifold pressure/vacuum obviously there are many more sensors like throttle potentiometers, camshaft sensors etc to determine the exact firing order for sequential injection that provide much more information & enable a far more versatile & accurate fuel map but those 3 are the core elements to pretty much any petrol injection system [/ QUOTE ] Yeah I knew that! I got to the stealers too L8 so was at the back of the line Didn't have time to wait that long, plus I didn't want to pay £60 + vat for the pleasure of them reading the memory!! Link to comment Share on other sites More sharing options...
SneakyMcC Posted May 31, 2006 Author Report Share Posted May 31, 2006 I spoke to the Bexley Audi about getting the fault memory read. They advised, after a grilling, that it was unlikey faults would be stored on an intermitent fault. Innit funny that a Service Adviser would never tell you that straight off the cuff So its back to basics. The tank has been over 1/2 full for a week. We've had no probs. How do I reset the throttle sensor(?). There seem to be different methods mentioned. I bought some contact cleaner for the ECU conections. Is there owt else I need to check? Link to comment Share on other sites More sharing options...
showtime Posted May 31, 2006 Report Share Posted May 31, 2006 that sounds more like they can't be bothered to find an intermittant fault a fault memory is a fault MEMORY, ie it remembers there was a fault, even if it was intermittant! the latest OBD (On Board Diagnostics) will tell you when & under what conditions any fault occurred but even something that happened once should still be stored i can't understand why some dealers are so reluctant to diagnose problems Link to comment Share on other sites More sharing options...
Ska Posted May 31, 2006 Report Share Posted May 31, 2006 I 2nd that, an intermittent fault would come up on vagcom as an intermittent code. the stealers are talking bull again. if your around west london let me know the vagcom offer still stands Link to comment Share on other sites More sharing options...
Will22 Posted May 31, 2006 Report Share Posted May 31, 2006 My S8 had an intermittent fault with the rear parking aid, as it happens the same one that had a problem on the S4 Both cars stored the fault until they were fixed. Link to comment Share on other sites More sharing options...
SneakyMcC Posted May 31, 2006 Author Report Share Posted May 31, 2006 [ QUOTE ] the latest OBD (On Board Diagnostics) will tell you when & under what conditions any fault occurred but even something that happened once should still be stored [/ QUOTE ] My sh1t aint gonna be the latest of anything The car is 10 this year! [ QUOTE ] i can't understand why some dealers are so reluctant to diagnose problems [/ QUOTE ] the stealer was quoting 1hrs lab to read the fault/mem. It was my questioning that brought in the technician who said he doubted the codes stored. To answer your question: which will earn them the most gelt? Wasting an hour @ £93.50 per/hour or a couple hours faffing about? The motor fired up ok tonight, but then felt like it was only running on 7 pots! Link to comment Share on other sites More sharing options...
SneakyMcC Posted May 31, 2006 Author Report Share Posted May 31, 2006 Thanks Ska. Are you around Friday or Sunday? Link to comment Share on other sites More sharing options...
Ska Posted May 31, 2006 Report Share Posted May 31, 2006 What time on Sunday? Link to comment Share on other sites More sharing options...
SneakyMcC Posted June 1, 2006 Author Report Share Posted June 1, 2006 I dunno, earlier the better for me. Really earlier the better... Link to comment Share on other sites More sharing options...
SneakyMcC Posted June 2, 2006 Author Report Share Posted June 2, 2006 I had a look under the bonnet at the ECU's, there appears to be no water ingress. Does the batt need disconecting before unplugging the connectors on the ECU's to clean with contact cleaner? Should I do this after Ska() has read the fault memory? Link to comment Share on other sites More sharing options...
showtime Posted June 3, 2006 Report Share Posted June 3, 2006 disconnecting the battery will (in most cases) erase any faults Link to comment Share on other sites More sharing options...
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