Audi 80 B4 problems

[Vasilijovic]

Hello everyone. Sorry that the question will not be related with S2 or RS2 models, but I thought that here would be great place to ask for advice. So, I have Audi 80 B4 2.0L 85kW and she is facing some problems: when I press gas pedal, revs goes up, then they drop down under 800, and then instantly gets back to normal. Sometimes when this happens car shuts off. I changed spark plugs, spark plug wires, distributor cap, rotor, air filter. Also cleaned throttle body and MAF. Nothing seems to help. Do you have any ideas what can cause this problem? Thank you.

[Tractor Dave]

Fuel filter clean? Screen in tank blocked?

[fish]

Do these have a ISV? I have "cured" a few of my S2, s and my 80 competition by removing it, cleaning it out and I sprayed som WD40 (or similar) in it and ran it on the ignition. Worked fine for me.

[Vasilijovic]

Do these have a ISV? I have "cured" a few of my S2, s and my 80 competition by removing it, cleaning it out and I sprayed som WD40 (or similar) in it and ran it on the ignition. Worked fine for me.

They have, I tried cleaning it, but nothing happens

[Vasilijovic]

Fuel filter clean? Screen in tank blocked?

Fuel filter has been changed recently, maybe fuel pump is not working properly? Checked fuel pump relay (30), it seems that she's working.

[M2ki]

30 is not fuel pump relay. Did you take the case of and checked for dry solder joints?