PsYcHe Posted November 15, 2006 Report Share Posted November 15, 2006 I think the codes stay until cleared.. Try clearing the logs and driving round for a few days to see what comes back. Link to comment Share on other sites More sharing options...
spencerbruntlett Posted November 16, 2006 Author Report Share Posted November 16, 2006 Yep the garage confirmed that the code would stay on there forever until cleared, so had that done this morning. Also changed the spark plugs to the expensive Iridium type recommended (£130 just for plugs, ouch!) and fitted a new fuel filter to try and start ruling some items out. Unfortunately its made no difference but the previous plugs although only having done 6k miles were already showing significant wear and the fuel filter looked like the original....the petrol ran out of it looking like tea!!! Yet again another example of Audi Service History not being worth the paper its written on as it says its been changed but clearly it hasnt. Will get codes checked again in a few days time to see if anything new occurs. Link to comment Share on other sites More sharing options...
spencerbruntlett Posted November 22, 2006 Author Report Share Posted November 22, 2006 OK, latest update after 2 days with an auto electrician....they have detected a random misfire on Cyl 1 but since swaping coil packs around to see if they were at fault no other faults have occured. The cold start issue persists and they dont have a clue whats wrong as all other electrics checking out ok. Anyone got any other tips on where to go from here as I am now seriously scratching my head??? Link to comment Share on other sites More sharing options...
Atomic Posted November 22, 2006 Report Share Posted November 22, 2006 Could be that one of the packs simply isnt firing for the first few seconds... Link to comment Share on other sites More sharing options...
spencerbruntlett Posted November 23, 2006 Author Report Share Posted November 23, 2006 Could one faulty pack really have such an effect with the other 7 firing? Am going to swap this pack out to see if it fixes the problem but not confident it will. Link to comment Share on other sites More sharing options...
Atomic Posted November 23, 2006 Report Share Posted November 23, 2006 I thought there was only 2 packs? eg one per bank. Link to comment Share on other sites More sharing options...
Ska Posted November 23, 2006 Report Share Posted November 23, 2006 No the V8's have one on each cylinder whilst the V6 has a cluster of three (1 between 2 cylinders) at the front of the engine with ignition leads connecting to the Plugs. Link to comment Share on other sites More sharing options...
spencerbruntlett Posted December 5, 2006 Author Report Share Posted December 5, 2006 Just curious, how easy/hard is is to change the temp sensor? No faults found by auto electrician but seems a logical next step to try as only get this problem in the cold. Link to comment Share on other sites More sharing options...
spencerbruntlett Posted February 12, 2007 Author Report Share Posted February 12, 2007 Update on problem - So this is starting to get expensive now. Diagnostic checks have ruled out temp sensor, had 8 new coil packs fitted, more diagnostic checks....still no fix. Further diagnostics today otherwise I am going to cut my losses and ditch this - get me a toyota corolla Link to comment Share on other sites More sharing options...
Ska Posted February 12, 2007 Report Share Posted February 12, 2007 Don't do that, I had one; it was only good for building up my NCB. Link to comment Share on other sites More sharing options...
SneakyMcC Posted February 14, 2007 Report Share Posted February 14, 2007 [ QUOTE ] still no fix. Further diagnostics today otherwise I am going to cut my losses and ditch this - get me a toyota corolla [/ QUOTE ] I'm very sorry m8 Have you tried emailing Paul Waterloo? (audipages.com). Link to comment Share on other sites More sharing options...
Ska Posted February 14, 2007 Report Share Posted February 14, 2007 I'm just running through things in my mind but have you checked your panel filter to see if it might be damp or even wet? Have you tried using easy start 1st thing in the morning to see if it fires up quicker - which might indicate fueling issues Link to comment Share on other sites More sharing options...
spencerbruntlett Posted February 14, 2007 Author Report Share Posted February 14, 2007 Thanks for the responses guys - I am currently trialing a new hypothosis. My LPG garage said that in rare circumstances the LPG system can effect starting even though the car always starts on petrol! How? Well as the LPG system controls input gases but not output gases it can provide a slightly lean mix (air leak on a faulty gas injector). The ECU will detect this and alter the fuel trims but obviously the LPG system will not see this change as its independant. When you then start on petrol the fuel trim is a mile out and provides the wrong mix. My long term fuel trims were out which would support this theory but no other garage picked up on this instead focusing on the mis-fire. And these long term trims are set over 100 miles or more, so just turning the LPG system off at start up would not fix this. So I am now running on petrol only for a week and will then see how this effects the car. If this does identify the problem with the LPG system then I will have a set of 2nd hand coils for an S8 up for grabs - wont be able to return the new ones Meantime please keep the ideas coming - this has been a long term issue now. At least if it is the LPG system at fault it will restore some of my faith in the motor itself and I can hold off buying the Corolla. Link to comment Share on other sites More sharing options...
jamesn Posted February 14, 2007 Report Share Posted February 14, 2007 Could it be HT leads? Link to comment Share on other sites More sharing options...
Ska Posted February 14, 2007 Report Share Posted February 14, 2007 The V8's dont have HT leads I believe Link to comment Share on other sites More sharing options...
spencerbruntlett Posted February 14, 2007 Author Report Share Posted February 14, 2007 Correct - 1 coil per spark plug Link to comment Share on other sites More sharing options...
jamesn Posted February 15, 2007 Report Share Posted February 15, 2007 I had a problem with a fuel relay which sometimes made the car slow to start. Mind you it did run roughly after that. Link to comment Share on other sites More sharing options...
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