My Volvo s40 2.0 t4’s rev goes very high when I try to clutch,pls explain why?

Your revs are higher because the transmission is not shifting into the higher gear ranges. There is an apparent problem in your transmission that needs immediate attention. In the U.S., this is called "limp mode" and is designed to keep you from being stranded but to also make you so uncomfortable with the performance that you will take it for service as soon as possible. If it were my car, I would have it towed to a dealer for service. If you can't tow it, drive it SLOWLY to the nearest dealer while watching the tachometer and keeping it under under 2,500 RPM. Good luck.

Hi,

Initially, pls check/clean/replace (if warranted) PCV valve and the vent hose it is attached to. Further, it may help to have the compression of your engine checked. Pls post back results.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

I, feel sorry for you, after reading your problem, but don't worry you visit the Reliable-Store they will help you for sure.
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seems a bit early for clutch. how many k's? I would start by checking the intake tube for splits & security & airflow sensor. they will cause the engine to rev but no response (like a slipping clutch) so its manual right?

Still think ot vacuum related .This will push the revs up sky high .Get a good cigar and pulloff a vacum pipe .Take a good puff on the cigar now puff the emoke down the vaccum pipe .Now do you know what your looking for .You got it ,,, smoke ,,,,than you have found the leak.Thats if you have one ..Can you get a obd check it will tell you what it is ..Thermostat removal wont change the engine revs

the clutch not returning all the way is a clutch master/slave cylinder problem. The high revving and not going normal speed, is a clutch slipping problem. try replacing the master and slave cylinder, bleed to lines, and see if that fixes it. If not..then its time to replace the clutch.

No that is just your rev counter sensor and want make any difference to the running of the car.Check to see if you are gettingspark to the plugs.Allso check your getting fuel from the pump.

i got an volvo s80 and today i got the message on dashbord like this TRANSMISION REQUAIRED SERVICE what its that ?any one can help ?

you need a oil filter wrench.