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200 Series General Forum for the Volvo 240 and 260 cars |
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230F idle speedViews : 729 Replies : 12Users Viewing This Thread : |
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Aug 30th, 2019, 09:29 | #11 | |
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Last Online: Jan 5th, 2024 11:50
Join Date: Sep 2015
Location: Portsmouth
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Quote:
I would get as low as 900rpm on a cold day and as high as 1100rpm on a hot day which I took to be an indication that, all things being equal, my engine was reacting to the air temperature. No biggie. If you're keen on hunting down minute technical gremlins for the satisfaction of having you're car idle at an arbitrary rate then crack on but, otherwise, I would suggest taking a note from the old adage that "if it ain't broke, don't fix it". Hope that helps, Alex
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2008 V50 2.0D R-Design @ 175K Previously 1992 Volvo 240 SE Estate B230F/M47 (was AW70) @ 200K (I wish I could've kept him) |
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Aug 30th, 2019, 13:26 | #12 |
Not an expert but ...
Last Online: Today 09:44
Join Date: Dec 2001
Location: Boncath
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I agree. Your idling speed seems close enough.
I too notice mine varies quite a lot for no obvious reason. Sometimes it seems happy at about 700 rpm, mostly in the 900 rpm region. While warming up it has a habit of starting off quite high when just having pulled up or released the accelerator, but then on idling it gradually settles down. The only thing I do feel isn't quite right is when very occasionally it momentarily stays up at 1200 - 1300 rpm, but can be induced to fall lower on blipping the throttle. I take that as an indication the IAV needs cleaning again, after which all returns to normal. The engine does seem very sensitive to tiny build-up of dirt in the IAV, but I imagine that is a feature of a component that really only has one setting, and so gets a bit stuck at that point. I do recall that when I had an LPG set up with a basic mixer, the IAV tended to have two sticking points, because the idling point was different on petrol and LPG. |
Aug 30th, 2019, 17:47 | #13 |
newish member
Last Online: Nov 7th, 2020 23:35
Join Date: Jan 2016
Location: London
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Thanks for latest input all. My 3 bits of logic are:
First Volvo manual says 750RPM. When the car does idle at that it is smooth and perfectly torquey, nice to drive (esp in traffic - this is SW London bear in mind) and quiet Two A flick of the ignition key at higher RPMs usually gets the car to revert to 750, but not always for very long. Throttle blip no effect whatsoever Three changing the IAV (now #5!) made a difference as did the MAF, but not consistently So my feeling is that it is an electrical fault somewhere. I take your point about higher speeds when hot and also about old car and if it ain't broke... I'll keep you posted, but again thanks. Nick |
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