FuntimeFrankie Posted May 6, 2006 Report Share Posted May 6, 2006 Right, this is going to be difficult to explain, but please bear with me..... My 2000 4.2 had a full service about 3 weeks ago, (mentionaing this just in case you chaps think the garage could have caused the following problem), and everything seemed ok. Last night driving home, gently pressed throttle, to the point just before kickdown, and noticed that the car was holding back, didn't feel like all the power was getting to the wheels. Eased off, then floored it..... only the car didn't, wasn't quite jerking down the road, but thats what it felt like! Drove into work today, everything 'seemed' fine. Floored it a couple of times, still ok, then eased off, and throttle to the point very near kickdown again, and same thing happended! Any ideas? Thinking maybe gearbox Link to comment Share on other sites More sharing options...
cruiser647 Posted May 6, 2006 Report Share Posted May 6, 2006 Not sure, but might be worth doingthe old throttle reset action. Maybe the garage disconnected the battery or something and the throttle needs to learn your style again????? Other than that, plug in the old VAG-Com and check the codes! any drop in MPG or such like? Good luck....... Link to comment Share on other sites More sharing options...
sapphire1616 Posted May 6, 2006 Report Share Posted May 6, 2006 Hi cruiser 647. Can you remind me of the throttle reset procedure please. Did it on the old A8 but have forgotten and would like to do it on the S8. Ta Link to comment Share on other sites More sharing options...
FuntimeFrankie Posted May 6, 2006 Author Report Share Posted May 6, 2006 Cheers Cruiser, haven't got access to VAG com, so will try the throttle reset procedure first. On searching I have found two methods:- 1st - (taken from here http://www.audi-forums.com/index.php?showtopic=4132&hl=accelerate ) Apparently you can reset the potentiometer by Engine off, turn ignition to 2 (dash lights) press hard on the accel pedal on off 10 times. Leave a few seconds, keys out of ignition then start the car. 2nd - Taken from here ( http://www.tyresmoke.net/ubbthreads/show...psed/sb/5/o/all ) 1. remove negative lead for about 20mins and replace 2. Turn ignition to to first position and leave for 5 mins 3. start car and let idle for 5 mins 4. restart car and go dor a drive Which should I do? Or is there another method for the A8 Thanks again Link to comment Share on other sites More sharing options...
cruiser647 Posted May 6, 2006 Report Share Posted May 6, 2006 Oh! I thought it was the :- Turn on ignition to the dash lights Press the accel pedal down to the stop slowly over 30 seconds Job done. It might depend upon if you have the cable throttle (earlier A8's) or the 'Fly-By-Wire' version. Link to comment Share on other sites More sharing options...
FuntimeFrankie Posted May 6, 2006 Author Report Share Posted May 6, 2006 I'll try that method then, fingers crossed Link to comment Share on other sites More sharing options...
FuntimeFrankie Posted May 6, 2006 Author Report Share Posted May 6, 2006 Right, just tried both methods (throttle 10 times, and over 30 seconds). Seemed slightly better, but when she hit high revs, started the slight jerk/pulling back again Could a faulty MAF cause these symptoms? Link to comment Share on other sites More sharing options...
cruiser647 Posted May 6, 2006 Report Share Posted May 6, 2006 Could be worth cleaning it with a cotton swab and alcohol/carb cleaner..........before you change it. Link to comment Share on other sites More sharing options...
FuntimeFrankie Posted May 6, 2006 Author Report Share Posted May 6, 2006 Remembering that I'm a muppet at anything mechanical, I don't even know where the MAF is, let alone clean the thing! You couldn't take the time to explain for me could you? Link to comment Share on other sites More sharing options...
cruiser647 Posted May 6, 2006 Report Share Posted May 6, 2006 The MAF is inside a protective plastic tube (about the size of a toilet paper tube). This sits in the lid of the airbox. Take that off, and then use cotton wool bud to gently clean the thin metal strip that you will see through the meshing. It is VERY fragile and VERY easy to break. Tools, only Crosshead screw driver to undo teh Jubilee clip holding the air pipes on. Hope that helps. Good luck! Link to comment Share on other sites More sharing options...
Ska Posted May 6, 2006 Report Share Posted May 6, 2006 the maf sensor is in item no. 2 in the diagram. Its a very thin wire essentially and you need to be very careful when cleaning its with either alcohol or electric contact cleaner using a cotoon swab etc. once you have cleaned the maf and if the prob doesn't go away you might wanna consider looking at the coil packs. Link to comment Share on other sites More sharing options...
SneakyMcC Posted May 6, 2006 Report Share Posted May 6, 2006 [ QUOTE ] Remembering that I'm a muppet at anything mechanical, I don't even know where the MAF is, let alone clean the thing! You couldn't take the time to explain for me could you? [/ QUOTE ] Some here? Link to comment Share on other sites More sharing options...
FuntimeFrankie Posted May 7, 2006 Author Report Share Posted May 7, 2006 Thanks very much chaps, I'll give it a go today, let you know how I get on Link to comment Share on other sites More sharing options...
FuntimeFrankie Posted May 7, 2006 Author Report Share Posted May 7, 2006 Halfords & Focus, neither sell Eletrical contact cleaner or Alcohol, feckers!!! Will have to wait until tomorrow Link to comment Share on other sites More sharing options...
cruiser647 Posted May 7, 2006 Report Share Posted May 7, 2006 I use the Wynns Carb Cleaner stuff. Link to comment Share on other sites More sharing options...
FuntimeFrankie Posted May 7, 2006 Author Report Share Posted May 7, 2006 Link to comment Share on other sites More sharing options...
FuntimeFrankie Posted May 13, 2006 Author Report Share Posted May 13, 2006 Thanks everybody for the assistance Due to the mesh being very fine on the 'tube', was unable to get a cotton-bud to one side of the MAF sensor, so that side I sprayed a little carb cleaner on it, and allowed to dry. Now working fine Link to comment Share on other sites More sharing options...
Ska Posted May 13, 2006 Report Share Posted May 13, 2006 I'm pretty sure you can slide the MAF sensor hot wire out; a couple of star type screws I believe. Link to comment Share on other sites More sharing options...
cruiser647 Posted May 13, 2006 Report Share Posted May 13, 2006 Good work fella! Link to comment Share on other sites More sharing options...
Botang Posted May 13, 2006 Report Share Posted May 13, 2006 [ QUOTE ] I'm pretty sure you can slide the MAF sensor hot wire out; a couple of star type screws I believe. [/ QUOTE ] Think they normally use tamper proof bits though, you can still get the tool for them as well though Link to comment Share on other sites More sharing options...
Botang Posted May 13, 2006 Report Share Posted May 13, 2006 My MAF cleaning method generally involves alot of switch/electrical contact cleaner and a zip up sandwich bag. I then let the sensor sit in the fluid and wash it that way, the sensors are supposed to be very fragile, so personally I wouldnt start prodding it with a cotton bud. Link to comment Share on other sites More sharing options...
SneakyMcC Posted May 14, 2006 Report Share Posted May 14, 2006 Nice tip! Link to comment Share on other sites More sharing options...
FuntimeFrankie Posted May 14, 2006 Author Report Share Posted May 14, 2006 [ QUOTE ] I'm pretty sure you can slide the MAF sensor hot wire out; a couple of star type screws I believe. [/ QUOTE ] This is true, but I didn't have the right tool, so resorted to the spray method, seems to have done the job. Should it happen again, will probably try the submerge method Link to comment Share on other sites More sharing options...
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