1999 Volvo C70 "revs down" Questions

...down the revs will pick to about 1800 revs then drop back down to normal. The revs also jump up about 150 revs when the clutch is down and changing gear. Try changing your idle control valve or ...

i only just brought it v6 1991 wont rev out clean dies down at high revs it has a rev limitor on it.. at high revs the computer shuts the engine down to prevent damage.

revs up and down at low revs escort 1.8 revs up and down at low revs you need to clean or replace your idle air control valve(IAC). The IAC allows your engine to idle smoothly by opening and closing a

...down the gears the revs are about 750 to 1000. I have tested the clutch with the hand brake on and the engine stalls in every gear, is this normal for the high revs. my friend has same model its ...

...revs whenb I change down through the gears coming down from higher speeds i.e. rev counter drops to about 600 revs/min when coming from 4th to 3rd.Have you any ideas what might be causing this? ...

i have a 2003 mazda rx8 its a manuel anyway il be driving in 5th gear and il put my foot down and the rev needle will shoot up and then drop back down while my speed anyway il be driving in 5th gear ...

...when ticking over revs go up and down from between 5000 revs up to 13000 revs every few seconds this seems to be matched with the air-conditioning unit engaging and dis-engaging try air mass ...

...revs up to 2000 rpm for 2 to 5 mins, then drop down to 1000 rpm. that is normal and lasts longer the colder it gets. but you never said how cold or how long, in time. only out of gear it must never ...

i replaced the fuel pump on our 1999 c70 t5, the car starts idles down and dies there seams to be plenty of fuel going to the injection, sometimes when it starts it will rev up but still dies change ...

...so put foot down and revs high no in-between Automatic Transmission? Sounds like it is slipping No fix for that-has to come out or at least look at data & diagnose why your having the ...