GolfGTIforum.co.uk
Model specific boards => Golf mk3 => Topic started by: ARB1991 on 14 October 2014, 21:17
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I bought my MK3 4 days ago and its already let me down on the way home from work :( I drove through a fairly shallow puddle as I arrived at work and it started misfiring badly as I pulled up. I left it running for a minute and gave it a few blips on the throttle and it seemed to misfire when the throttle was over about 75% open. I left it for the day (had to start work) and when I came back to it it started up straight away and seemed ok but when I pulled away from the car park it died. Had real trouble keeping it started in traffic and managed to get to a layby. It seemed ok when i eased the throttle on and happily revved to around 5000rpm but as soon as i let off and planted my foot again it missed and died and hasn't started again since. I've cleaned the throttle body out and checked the coil for a spark, took the dizzy cap off and that all seems ok, oil is a bit low but would that cause it not to start?
Any help would be greatly appreciated ;)
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what engine do you have (engine code)?
sounds like ignition problem though, but since you checked could be other things but there are 3 different 2.0 8v engines in the mk3...
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I'll check tomorrow
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My guess is HT leads or coil on its way out
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does the throttle body not re-set by vag-com after cleaned ???
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depends on what engine he's got....
2E does not need to be reset (it's a pretty dumb one :tongue:)
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engine code is AGG 174 898. Battery now dead from turning over so much :/
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check the ht coil for hair line cracks (also check ht leads and dizzy cap with a spray bottle)
check crank sensor and its wiring
re-adapt throttle with vcds (disconnecting battery will not do it and it also does not teach itself like other engines)
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as said check the coil, leads etc by giving them a dose of wd40 or similar and see when it improves (if it does)
(I'd bank on coil myself but knowing these engines! b.t.w I keep them stock £21 delivered for the agg)
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as said check the coil, leads etc by giving them a dose of wd40 or similar and see when it improves (if it does)
(I'd bank on coil myself but knowing these engines! b.t.w I keep them stock £21 delivered for the agg)
Dont ever spray WD40 on suspect leads, coil or ignition especially when the engine is running.
It catches fire trust me.
Use water in a spray bottle and look for it arcing, if it sparks then fit new parts.
If you must use it then wipe up excess and do it on a cold engine.
I would go for coil as being suspect, I always fit new leads with a coil as leads with high resistance/damage cause the coil to heat up internally.
Crank sensor next.
Itavaltalainen is right about the ADY TB it needs a proper Vag com re set if out.
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ok so its running now, thanks for all the input guys.
she's now topped up on oil, ran some redex through the tank, sprayed a little easy start into the TB, and WD40 on electrical connections and dizzy, she fired up, ran a little rough at first with a bad misfire under full throttle, but after she warmed up properly and ever since she's been fine.
I'm guessing that I'm gonna need to buy some new parts, start with a new dizzy?
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new dizzy or dizzy cap?
b.t.w let me know what you need and I will try and sort a good deal (sales@oemandmore.co.uk)
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I have the same engine in my passat b4....i.changed everything mentioned in this post by others and no go. It took my very skilled mechanically inclined friend wh removed the distributor as it was not aligned properly even though getting spark to plugs....so check.the distributor timing and timing of cambelt....my friend said it was a mystery as to how.the timing was off...who knows? these old cars surprise you....
After all that work the car still cut out at 70mph for a few.seconds on the motorway....scary stuff...dropped revs and then sprang back to life...did this for many months and then stopped....after that it wouldn't start again ....that disappeared after changing the engine oil....go figure...
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Hi all,
I know this is an old thread but just wondering If I remove throttle body from an AGG will it need vag-com reset?
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I'd recommend to run the TB alignment procedure in VCDS for all 2.0 engines in the mk3 with exception of engine code 2E.
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Is it essential though? I don't have access to VCDS and could do without the expense right now. Also, must one depressurize the fuel system before removing TB?
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AGG has a Simos control unit.... it does not teach itself. TBA with tester or VCDS needs to be done so it runs smooth.
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TBA with tester
TBA?
Ive searched threads for people with diagnostics and the guys near me havent been here for over a year.
how about cleaning in situ then? with carb cleaner i.e. ecotek, through air intake.
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Throttle body alignment.
Have a look on this map....
http://goo.gl/maps/0Shx
Maybe someone on there is close to you.
I am in London on Tuesday during day time.
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of course, sorry bit of a blonde moment there :embarrassed:
very helpful, thanks. But no one near me unfortunately and cant risk driving her too far obviously.
I'm not gonna lie i think i'm going to risk it. At least I'll know its clean and can rule out the TB being the problem. I can always Vagcom it later down the line if need be.
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Remove the TB and clean it, in situ you can't get to all of it.... get a new paper seal for it from dealer before taking it off though.
If it runs at 1400 and/or idle is not stable you'll need to do TBA ;)
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get a new paper seal for it from dealer before taking it off though.
the gasket between TB and Inlet manifold?
is it prudent to depressurize fuel system too?
thanks for all the advice.
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Been a while since I owned a mk3 :D
Fuel rail is not connected to TB and does not need to come out afaik or iirc..... i.e. not required to depressurise.
But if you want to all you need to do is unplug fuel pump relay and start engine. That will depressurise in a second.
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Decided not to attack the TB today after thoroughly reading all 43 pages of this amazing and exhaustive thread:
http://www.golfgtiforum.co.uk/index.php?topic=2080.0 (http://www.golfgtiforum.co.uk/index.php?topic=2080.0)
instead i went for the CPS, which went to the top of my list after reading that mammoth thread.
this is what i found:
(http://i138.photobucket.com/albums/q258/jimmerehab/VW/Crank_02_zpsek4v8hql.jpg)
(http://i138.photobucket.com/albums/q258/jimmerehab/VW/crank_01_zpsqxzp8ns1.jpg)
admittedly i caused a lot of the damage you see, but none the less it just goes to show how old and brittle this part has become. It could also be the original factory part, Siemens branding. now to find the replacement...
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Is this (http://www.ebay.co.uk/itm/FEBI-CRANK-SENSOR-VW-GOLF-MK3-2-0-8V-2E-ADY-AGG-2-0-16V-ABF-INC-GTI-/262224311209?_trksid=p2141725.m3641.l6368) the druid you are looking for?
PS: Link above is a forum member (and sponsor) on here.... PM him and he might give you a forum discount. ;)
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Is this (http://www.ebay.co.uk/itm/FEBI-CRANK-SENSOR-VW-GOLF-MK3-2-0-8V-2E-ADY-AGG-2-0-16V-ABF-INC-GTI-/262224311209?_trksid=p2141725.m3641.l6368) the druid you are looking for?
PS: Link above is a forum member (and sponsor) on here.... PM him and he might give you a forum discount. ;)
Yeh I looked up OEM&M already :wink:. There's lots out there to choose from, ranging quite considerably in price (and also quality I'm sure!); Anywhere from £20 up to £80.
I've spotted a good price on a 'Topran' sensor, and a pretty reasonable price on a 'HAAS' one too.
Budget is very much a consideration, the purse strings are pulled very tight at the moment :cry: