Audi 80 2.0L ABK engine juddering/misfire

hunzan · 06-05-2007,08:42 AM

hi, I am new to this forum, and like all the others i am having the same problems with my Audi 80. I Have tried just about everything that has been mentioned before except for the ignition switch, ours is worn and it can turn on and off just by going over a few bumps. I am thinking the heavy key rings have contributed to this over a period of time wearing out the barrel creating a flat spot in the barrel. this can bring all the symptoms; central locking, wipers not working, gears not changing , overdrive not up shifting, will run beautifully in cold weather 200 plus kms in one trip, after Stopping for fuel and a cuppa tea the ruff runnng starts again.after turning the switch off it sometimes restarts. have by passed the ignition switch (hotwired) it runs better. also removed the gear lever lock cable as this was causing the ignition to shut off. will keep you posted. any comments welcome

**guyg** · 06-05-2007,11:57 AM

Originally Posted by stevie160

Thanks. Mine must be in the boot. I'll let you know how I get on!

The fuel pump should be near the fuel tank underneath the car...

Cheers

Guy

**brd** · 16-05-2007,01:56 PM

Hi folks...

Well... after starting this thread a while ago now, this problem is really starting to wear me down.... still no solution.

I changed the MAF (Mass Air Flow meter) with a secondhand one that should be fine (was still 200 euro!).... no joy. I bought an ECU on ebay for an ABK thinking sure what the hell, I have to find a solution anyway. Then I find out (after "swearing like a trooper" - another thread on where to find the ECU here) that I can't change it easily on a cabrio as the ignition key is chipped for the immobiliser and I would have to get an ECU for this type of system and have it programmed for the key etc etc.
(so I have an ECU for an ABK engine for sale!)

So... I really don't know where to go with this. It's been in an Audi garage 4 times and while they have driven the car and actually felt the damn juddering themselves, they can't find the problem. Also, the weather is getting warmer and the car is practically undriveable now as it happens most of the time.... although maybe I'll bring it back to the garage as it should be easier now to trace - I would be thinking.

What bugs me is that the car is in very good condition mechanically, and lots of lovely options (a few scrapes here and there, but thats life) ... so I would like to keep it.... but it it simply doesn't run right, it ain't no damn use.

Maybe I'll change the coils... but would they not either just work or not work?

Either way, I'll keep you posted... as I have definitely seen the value of these forums when information is so hard to come by.
B.

**stevie160** · 16-05-2007,04:06 PM

Hi BRD,

It could well be the coil pack. I had a mini many years ago that would heavily misfire/judder after it had warmed up. Turned out the coil was breaking down after it reached a certain temp. It was of course the last thing that I tried after considerable expense changing parts that were ok!

My Audi '92 ABK had a new coil at 95K miles, cost around £80 new.

Regards,
Steve

**midskev** · 16-05-2007,08:01 PM

hi just a thorght but iv got the same prob on a tdi 80 spent a packet tried audi they havent a clue if its bolted on iv swapt or replaced it yesterdayt ui was driving along n my speedo stopped working and the juddering stopped too !!!!!!!!!!!! i banged the dash and the speedo worked n the juddering returned

worth a try im taking thee dash out at the weekend looking for a broken wire and the speedo pickup on thee gearbox if i can find it good luck

**stridey** · 21-05-2007,04:03 PM

Hi all,

I've got an m-reg audi 80se, sounds like its got a very similar problem to what most of you are experiencing......... although my fog light switch keeps flashing red when engine is tryin to stall, & on a couple of occasions has actually cut out ( then wont start or even attempt to fire for at least 10 minutes) got told it was possibly the boot loom wiring (which it wasn't)
HELP!!!! cos its really startin to do my suede in. any ideas would be appreciated

**brd** · 21-05-2007,07:59 PM

If you can get a garage to run a diagnostics check on it, that could be the easiest place to start to find out what's wrong. If it was the lambda sensor for example, that would show up. See if you can geta quote for what needs to be changed, and then see if you can change it yourself. Some parts are easy enough to change and you can get parts online for good prices.
B.

**stridey** · 29-05-2007,03:23 PM

cheers brd, havent done that yet but it seems to be an electrical fault to me (maybe a bad earth or something)

**stridey** · 06-06-2007,11:44 AM

finally sorted guys....... she's running like a little bird

. Turned out to be the immobiliser control system.

**Mr Blond** · 06-06-2007,04:16 PM

I have a Audi 80 avant 1.9 tdi estate (1995)
It has this judder that you lot have been talking about and a garage has pin pointed to being either the Map sensor or the Injector Pump. does anyone know where the map sensor is located and where could I buy a cheap injector pump? My mate who has the car is gonna run a few more tests on it 2morrow. It has taken nearly £1000 to get this far, but at least I have a good handling car now. We have changed the gearbox and all the bushes on the front.