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Hi guys! Finally, I think, I'm getting close to solving my issue of low boost. I had a 5000 km roadtrip just after new year. Most of the route was on a highway with 100-120 km\h cruising speed. So, I noticed, that when I go full throttle, engine wouldn't go past 5000 RPM. And the sound of the engine...

Make "Stellglieddiagnose" like shown in the "Reparaturleitfaden". Install a "controle" standard LED parallel to the conatct of the N75 (right polarity and a resistor with 500 Ohm in serie) So you can see the LED start to flicker if the Boost regulation will start at 57° trottle angel. But you must ...

Hi everyone! Thank you for your replies! You are the best ) So, I haven't found the reason of low boost yet, but I've done a lot of diagnostics: 1) Membrane is OK. Just in case I bought new one from 034 motorsports but will put it later when I install 0,9 Bar chip 2) Throttle switch is OK. Tested it...

Hello Sam, google Translate ist sometimes a funny thing. The "diaphragm" in your car ist a " Membrane ". -> "Wastegate-Membrane" The "Zwerchfell" is a muscle-tendon plate which separates the thoracic and abdominal cavity in mammals. It has a dome shape and is the main breathing muscle. To get more ...

The boost is 0,2 (1,2 bar on display) at 3000 rpm and up.

Error memory is empty

Entschuldigung für meinen schlechten deutsch. Ich werde auf Englisch schreiben und dann unten ins Deutsche übersetzen So, I have MC2 Turbo. And it has low boost. I changed a lot of sensors, intake hoses, checked N75 and throttle switch, etc. The only thing I haven't seriously checked is westgate dia...

A little update, I've changed the intake boot (found good used one) and repaired the old electrical connections on the throttle switch. Finally, N75 didn't work because there was no signal from the full throttle switch. The turbo pressure become 1.3 above 4000 rpm, instead of 1.1-1.2 But still, I fe...

Hi Matthias! Indeed, my caster is 1 degree out of normal for the front left wheel. Hopefully, I can correct it somehow. Yes, by "strut bar" I mean long metal rod, that is placed between the front wheel arches (struts) to stiffen the chassis. Like this: https://rasporki.com/netshop/audi/audi-a6c4/aud...

Thank you, Poldy!

I'm not sure if my KL is a copy of Bürgichip, but maybe. If only I knew about it before.

My fuel system works good, so I just wouldn't touch it then.

Hi fellow Audi lovers! Sorry to write in English, but our Audi 100 C3 community is so small all over the world, that I just have to do it. As, all of the experienced people with knowledge of C3 are in Germany. =) I have an MC2 89' engine which I would like to upgrade a bit in future. I have purchase...

Wow, thanks Mathias! I also work in Automotive, but not with technical side. Thank you for the info! I've installed damper in order to make my Audi less nervous and more stable on the straight highway. But after I've installed it, stability was no better. So, now I'm suspecting, that my chassis was ...

I've successfully installed the damper from W201, it works fine.
I took SWAG 10520003 part

Only keep in mind the motor wiring loom on the right side of the car.
I have accidently broke my wiring after installing the damper. Because wires have to go behind the damper and not in front it.

Thanks for trying to help! I don't have alarm on my car. And I've found a problem of no-start: Weirdly, it linked to the steering damper ( https://www.drive2.ru/l/479725170609619339/ ) I have installed additionally. It mounts between the steering rack and the firewall. So, after installation the mot...

Hi sigare!

Thank you for the reply!
Now I understand much more.

Haven't thought that IC sensor is so important. Maybe thats why I lack boost.

I have a new problem now: car won't start, no spark. I checked G28 and G4 sensors - they are good.
Will try checking ignition coil driver and ECU.

About oil pressure:
Also check the oil pressure using the external manometer, as oil pressure sensor can be faulty.

Hi guys! I've recently sold A6 C6 and bought Audi 100 C3 Facelift instead. It has front wheel drive, turbo MC2 engine and Avant body. I've tried to get as much info as I can, but no one seems to know. So, I need your advice: - Should the aftercooling pump turn on together with injector cooling fan o...