Update on throttle body clean / replacement air pipe .. all wentwrong
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From: Chris Bartram on 24 Jun 2010 15:38 On 24/06/10 17:43, Stephen wrote: > My neighbour who's an ex audi tech said I should just get the throttle body > aligned by diagnostic computer and see how it drives from there or just > drive it around for a while as I tampered with the throttle body and it > should usually re-learn the settings and idle correctly once the new > settings have been earn't. > He is right. http://www.ross-tech.com/vag-com/cars/throttlebody.html You need someone with VCDS or a dealer computer.
From: Chris Bartram on 24 Jun 2010 15:49 On 24/06/10 17:43, Stephen wrote: > mk4 golf 1.6 8v 1999 AEH engine code > > After replacing the air pipe between the airbox and throttle body with a new > pipe as old one was damaged. All replaced well, new jubilee clips on and VW > ones shoved in the bin. > > I now have eratic or hunting as the mechanic called it. Basically in drive > everything is fine idle wise it drops to about 900 rpm. In park however it > shoots up to about 1200 rpm and stays theres. Sometimes it drops to 1000rpm > then if you touch the gas pedal it shoots up again. > > All I did was replace the air pipe between the air box and the throttle body > and then I carb cleaned the throttle body (did not remove it just cleaned in > situ) then I used the throttle wire to open the butterfly to clean a little > deeper down. Which according to the mechanic may have broken the stepper > motor (valves) on the throttle body or dirt has gotten into the valves. > > I have no idea how dirt could have gotten into the stepper motor. > > After searching on a mk4 golf forum and reading as this car is DBW I used > the throttle cable to open the butterfly and clean down the back of it, > after reading it seems doing this is bad and can upset the "home settings" > of the stepper motor if neck wreck it. > > and it also said it would be new throttle body time. > > I hope that isn't so as there about �200 odd I think. > > On my golf a 1.6 16v 2001 I lift the engine cover spray wipe drive and no > problem at all. But on my sisters golf its a world of hassle as above > really. > > I didn't take the TB off just cleaned what I could get to as it was. > > One thing to add on the Air flow meter I sprayed a little carb cleaner down > it as it looked a little dirty ... I'll put the carb cleaner away and not > touch it again lol > > I paid �30 for a diagnostic scan (no fault code lights on) : > > I have fault code 00533 idle speed regulation > http://wiki.ross-tech.com/wiki/index.php/00533 > > 00520 air flow/air mass > > 00523 intake air temp sensor > > Now all faults were cleared and the only one that came back was 00533 idle > speed regulation which has led the mechanic to think the stepper motor > valves are dirtyhe said even a spec of dirt could cause this. > > My neighbour who's an ex audi tech said I should just get the throttle body > aligned by diagnostic computer and see how it drives from there or just > drive it around for a while as I tampered with the throttle body and it > should usually re-learn the settings and idle correctly once the new > settings have been earn't. > > any ideas where I've gone wrong (be nice) lol ... you ever start a job and > wish you never did > > > > Oh, and it's probably better to remove it to clean it, but then you need to do the alignment, plus you need a new seal.
From: Chris Bartram on 25 Jun 2010 09:31 On 25/06/2010 11:43, Stephen wrote: >> Sadly the local garage want �50 for a 3 minute procedure and I don;t know >> anyone with vag-com... I'm struggling to get my vag com shareware and lead >> to work. It just won't connect with the car as I was hoping to run through >> the basic settings for the throttle body alignment. Ask on one of the VAG forums- Seat/Skoda/VW/Audi. There is bound to be a member near you who will to the TBA for a beer or two.
From: Duncan Wood on 25 Jun 2010 12:13
On Fri, 25 Jun 2010 16:47:03 +0100, Stephen <none(a)none.com> wrote: > > "Stephen" <none(a)none.com> wrote in message > news:i0218t$660$1(a)speranza.aioe.org... >> >> "Stephen" <none(a)none.com> wrote in message >> news:i01usi$2k7$1(a)speranza.aioe.org... >>> >>> "Chris Bartram" <news(a)delete-me.piglet-net.net> wrote in message >>> news:i00c72$vep$2(a)news.eternal-september.org... >>>> On 24/06/10 17:43, Stephen wrote: >>>> >>>>> My neighbour who's an ex audi tech said I should just get the >>>>> throttle >>>>> body >>>>> aligned by diagnostic computer and see how it drives from there or >>>>> just >>>>> drive it around for a while as I tampered with the throttle body and >>>>> it >>>>> should usually re-learn the settings and idle correctly once the new >>>>> settings have been earn't. >>>>> >>>> He is right. >>>> >>>> http://www.ross-tech.com/vag-com/cars/throttlebody.html >>>> >>>> You need someone with VCDS or a dealer computer. >>> >>> Sadly the local garage want £50 for a 3 minute procedure and I don;t >>> know >>> anyone with vag-com... I'm struggling to get my vag com shareware and >>> lead to work. It just won't connect with the car as I was hoping to run >>> through the basic settings for the throttle body alignment. >>> >>> Also after some thought and reading from ukmkivs.net the feeling there >>> is >>> if the rev needle bounces it strongly indicates a vac leak of some >>> kind. >>> Which got me on the thought of checking everything was present in the >>> area of what I have touched. There is one thing missing which is an O >>> ring which fits on the airbox / air mass meter end, I guess a small >>> weep >>> would cause these symptoms, its a £2.86 part from th dealer is is on >>> order as its the cheaper of anything. (accordin to dealer computer >>> etka) >>> >>> A scan this morning on my sealey vag scanner is still showing all of >>> the >>> faults yesterday, the air flow meter fault is back and the intake air >>> temp sensor and idle speed regulation. I'm wondering if this one o ring >>> could kick up all these faults. >>> >>> The thing is though the car obviously didn't have this o ring before, >>> and >>> worked fine. I wondering if all the commotion of changing the air pipe >>> upset a ring of dirt sealing it lol or something like that ? >>> >>> too add to all of this would a faulty ignition lead cause any of these >>> as >>> I took one off to see what the spark plug ocniditon was like and had a >>> little trouble wiggling it back on, but it did eventually make a pop >>> sound when it did go back on. Also remove the ignition lead part that >>> goes on the coil pack to see how easy or hard it comes off as I planned >>> on servicing it soon (never done before on this car) all went back on >>> ok. >>> >>> ...Theres a niggly part of my brain saying I've upset something. And >>> before shelling ou on expensive parts like genuine vw air flow meters >>> at >>> £165 and throttle bodies at over £200 best to actually diagnose the >>> problem. I can swear I can hear a whooshing sound by the air pipe which >>> is brand new and undamaged from what I can see ... pffft >>> >>> I'm going to try and get this throttle body alignment procedure done >>> first and then the o-ring and post back my findings. >>> >>> Never had a prolem like this usally a broken, damaged part... just >>> order >>> new one fit and quit this is a little more complex for me, but am >>> trying >>> to have a go at sorting it before conseeding defeat and taking it to >>> the >>> garage. >>> >>> ho hum >>> >>> >> >> Forgot to add the fault with my vag com is vag com does find the lead, >> status is on ik, but if I try and scan anything it searches and says >> cannot initialize module... if I could just get it to work and sort the >> tb >> out would be great... time to google it. I tried changing the baud rate >> from 0 to 9600 no joy. >> > > I got the lead working got it registered for $99 about £66 odd well > worth it > for all the features I'll never understand how to use lol. ANyone > performed > the all important throttle body alignment a few times, unfortunately its > not > working. Its resets it, I can hearing a whirring but I still have iratic > idle. All done after I cleared the DTC's etc as per ross tech wiki. > > So I guess its time to figure out if vag com can help me check if the > MAF is > functioning with some live data logging or some such ... more blooming > studying coming up... > > I used to enjoy a bit of home diy but now it annoys me .. apologies just > feeling frustrated humpf > > It's probably worth a really carefull check for air leaks. -- Duncan Wood |