2.0E low rev cough

Inexperienced Joined: Jun 14, 2012 Posts: 24

Evening all
I picked up my B4 2.0E this afternoon, and a puzzling fault developed on my 150 mile drive home. If you are below 2000 RPM (1800 seems to be the specific point) and you give more than 1/2 throttle it seems to cough. It pulls through fine to the redline and above 2k it isn't a problem.
Any thoughts as to what I should look at 1st?

Cheers

Craig

UltraUser Joined: Mar 18, 2005 Posts: 1570 Location: Gwent

Hi,

To me it sounds like it could be an electrical misfire? However, if it's the ABK engine have a look at the ecu relay before you do anything else.

http://www.audifans.net/ftopict-33173-relay.html

Inexperienced Joined: Jun 14, 2012 Posts: 24

I'm not sure on the engine code, but its the 2.0 8v engine so it looks right. A trip to Audi during the week then I think, cheap enough to buy a new one just in case and keep the old one as a spare

UltraUser Joined: Mar 18, 2005 Posts: 1570 Location: Gwent

The ABK is the 115hp engine with multupoint inj, there is a singlepoint inj model with about 90 hp if that helps, but the ABK uses the suspect relay.
If you want to eliminate the relay by all means do so, but as I said in the other thread, you can fairly easily pop the cover off and inspect the soldering on the pcb.

Inexperienced Joined: Jun 14, 2012 Posts: 24

It has got the ABK engine, the local audi dealer is struggling to find the relay listed, I shall try again tomorrow with the codes of the side of the one you pictured Smile

Posted: Mon Jun 25, 2012 8:18 pm

the part number is 165 906 381 , also known as relay 30. how is the service history? has the basic servicing been done? plugs and leads, filters and stuff?

Inexperienced Joined: Jun 14, 2012 Posts: 24

Sadly, 2 years ago it had a folder full of history, but 2 owner changes later and its all been lost Sad

so a good service is next on my list.

Inexperienced Joined: Jun 14, 2012 Posts: 24

Well some progress has been made, but was a struggle Sad

Audi finally came good with the new relay 30 yesterday morning, so I though I'd crack on and change it this afternoon, it'll only be a quick 5 min job Razz

After unbolting the lower section of dash, I eventually found the relay, swapped it over and tried the ignition.

All the lights come on, but nothing Sad

so an hour of sorting through wires under the dash, and I find that a wire had been cut and rejoined on the back of the ignition barrel Sad

So out with the soldering iron and that's repaired properly and back in action. Quick test drive after putting it all back together, and the mis has gone Smile

UltraUser Joined: Mar 18, 2005 Posts: 1570 Location: Gwent

Nice find! I guess the relay was not really needed at this time? Or did you look inside the old one?

Inexperienced Joined: Jun 14, 2012 Posts: 24

I haven't looked inside the old one yet, and today it came back again Sad

But less often and not as bad

So will be cleaning out the airflow meter and trying to sort out the right cap and rotor arm for it

Posted: Fri Jul 13, 2012 9:15 pm

could be the air flow meter electrics playing up, my abk did this , it took me ages to find the problem and sort it out, once you have tried all the obvious things and had no success, you could try another air flow meter and see how it runs then, they come up on ebay now and then.
Have had a fault code read done? you can buy a cheap ebay lead and 2+2 adapter for less than a shop charges for a simple fault dtc read, you can download the free ross-tech vcds programme and see whats going on with the engine management.

Inexperienced Joined: Jun 14, 2012 Posts: 24

I shall have a look at that, I'm thinking that giving it a good clean out first is a good plan.

I haven't had the codes read yet, and you might be right that a basic code reader could be a good investment

Posted: Sat Jul 14, 2012 12:04 pm

if you have a laptop you can use this software and a lead a see whats going on in real time with the engine management system, http://www.ross-tech.com/vag-com/index.html

Inexperienced Joined: Jun 14, 2012 Posts: 24

Hmm, I shall have a think about that, any idea were the best place to get the lead is?

Posted: Mon Jul 16, 2012 7:10 pm

Just give everything a good clean first. And do all the usual service stuff.

Make sure you clean all the breather pipes out, and check for air leaks around the air intake. Also give the ISV valve a good clean out with something. Very Happy

sorted

My ABK tends to like its lambda sensors so check the volatage fluctuation on that too.

PS if you get a lead that will read the codes properly let me know where you got it. you will need the OBD to the 2x2 converter too.

Posted: Mon Jul 16, 2012 8:36 pm

dez, i have an abk engined 80 and bought a cheap ebay lead and 2+2 from ebay aswell, i have no problems checking the ecu fault codes and all the other stuff its meant to do, just search ebay for 'vag com kkl lead' and this is the one i used http://www.ebay.co.uk/itm/Interface-USB-OBD2-VW-Audi-Seat-Skoda-OBD-OBDII-VAG-D06-/230605316298?pt=Elektroger%C3%A4te&hash=item35b125e0ca.