|
S40 / V40 '96-'04 General Forum for the Volvo S40 and V40 (Classic) Series from 1995-2004. |
Information |
|
Revs rising & falling at idle - never happened beforeViews : 945 Replies : 15Users Viewing This Thread : |
|
Thread Tools | Display Modes |
Jun 17th, 2019, 10:30 | #11 |
Member
Last Online: Feb 4th, 2021 14:56
Join Date: Jul 2008
Location: london
|
S40 revs up and down at idel
Just a FYI - I have a S40 X reg auto petrol.
I had revs going up and down at idle - I could feel it through the steering wheel. On investigation I found one of my vacuum hoses had come disconnected from the air filter (- goodness knows how as its well supported/connected) - shoved it back in and hey presto - back to normal running. Im just saying its worth checking your vac hoses first before starting to dismantle things. Mine was the one from the rear of the air filter. |
The Following 2 Users Say Thank You to oliverpervasive For This Useful Post: |
Jun 17th, 2019, 11:34 | #12 |
Junior Member
Last Online: Apr 12th, 2024 12:12
Join Date: Sep 2018
Location: Heers
|
To find vacuum leak spray (all) the hoses with brake cleaner,if it leaks you will hear the revs go up.
|
The Following User Says Thank You to loelly For This Useful Post: |
Jun 18th, 2019, 16:47 | #13 | |
Premier Member
Last Online: Mar 24th, 2024 17:33
Join Date: Nov 2000
Location: Nottingham
|
Quote:
Thx for that. That reminds me of an 850 auto I bought off ebay a few years ago. It was cutting out when coming off the accelerator & when I got home I found that there was a massive split in one of the air hoses! How the previous owner hadn't noticed & dealt with it before I can't fathom! A few pieces of duck tape as a quick fix and all was good until I got a proper replacement.
__________________
Now: 04 reg V70 2.4 SE 2.4 auto 177k Then: Volvo, Saab, BMW, MB, Ford, Vx, Opel, Fiat, Rover, Porsche, Alfa, Austin, Renault, etc |
|
The Following User Says Thank You to CharlesStevenson For This Useful Post: |
Jul 3rd, 2019, 18:56 | #14 |
Premier Member
Last Online: Mar 24th, 2024 17:33
Join Date: Nov 2000
Location: Nottingham
|
Just a quick update for anyone who searches for info on this issue in due course.
Over the weekend I removed and cleaned the IACV. New gasket for unit was £3.30 from Volvo, couldn't find any on ebay. Since cleaning and replacing it the up & down idle issue has *nearly* gone away, and seems to clear itself much quicker than previously, which suggests to me that I need to re-clean the unit, but more deeply this time. A better (possible) solution than having to replace the MAF unit. Will update over the weekend for future solution seekers.
__________________
Now: 04 reg V70 2.4 SE 2.4 auto 177k Then: Volvo, Saab, BMW, MB, Ford, Vx, Opel, Fiat, Rover, Porsche, Alfa, Austin, Renault, etc |
Jul 4th, 2019, 16:10 | #15 | |
Non Fragile
Last Online: Oct 13th, 2023 05:46
Join Date: Apr 2010
Location: Chadderton, Oldham
|
Quote:
EDIT: Thinking about this, I've been given the title of "honourary redneck" by my american freind, haha, due to my determined effort to never buy anything if I can avoid it, and fabricate stuff myself wherever possible. £3.30 isn't very much to spend - but that just goes to show how technically trivial it is. It's carboard!! Last edited by canis; Jul 4th, 2019 at 16:13. |
|
The Following User Says Thank You to canis For This Useful Post: |
Jul 5th, 2019, 19:50 | #16 |
Premier Member
Last Online: Mar 24th, 2024 17:33
Join Date: Nov 2000
Location: Nottingham
|
Canis, "honourary redneck", LOL that's great!
__________________
Now: 04 reg V70 2.4 SE 2.4 auto 177k Then: Volvo, Saab, BMW, MB, Ford, Vx, Opel, Fiat, Rover, Porsche, Alfa, Austin, Renault, etc |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
|
|