Mini has been idling low lately, have run sykes pickavant arc2 diagnostic. Posted video on YouTube https://youtu.be/p23btGvvWUM . After reading the forums i suspect that it is probably the vacuum lines, but wanted to see if any one can make a more informed diagnosis after reviewing results before i do anything. Any advice is appreciated.

$10 says your running BP ultimate 98 in it

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Mainly Mobil 98.

I was having issues with my R53 for the last few months , low idle, stalling trouble starting with BP 98 got the tank down to pretty much empty, filled it up with bp95 problem gone.... maybe worth a try, as I think Mobil 98 is from the BP refinery.. could be wrong. a lot of people are having this issue from Falcons, Holdens, minis, bmws, motorbikes etc

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Just wonderibg how much the arc set you back?

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just looking at the values is only half of the story. you need to do some tests to compare the values engine running versus engine stoped.

against the vacuum lines speaks; no fault codes, MAP value around 30kPa idleing. damaged vacuum lines usually give a higher MAP value, being non plausible with RPM and TPS values resulting in a stored fault code.
they may be damaged in spite, they are always worth a check.

Lambda looks very low. if the ARC gives the same values as a Rover Tester it should swing from 1 to 4 volts (0-5 volts range) as it is internally calculated up from the 0-1 volt the sensor itself can provide.
but coolant is also low, should be 88°C minimum for any tests. anything lower means warm up to the ecu, resulting in more fuel being injected and lambda sensor being ignored.

not 100% sure on this one, but the idle switch should be closed not open when at idle. to test it push the pedal and look at the value, it has to change with very little throttle applied.

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Rover 214 atm ....

Borrowed ARC reader from Matt Read, i have also made a usb cable and that can connect to laptop using memsgauge free software and also can connect to mobile phone using mems diag app. I have also noticed that the idle will drop down when i press the brake pedal? Does this mean that I have an air leak some where?

memsgauge is a great real time display, certainly worth a try.
if you have the full version of MEMS Diag a data log would be nice. best from cold start to see if all sensors are working correctly.

did you check the vacuum lines? can you hear and see the idle control motor do it's work when the ignition is turned off? is it drivable without problems except the low idle?

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Rover 214 atm ....

I'll run a mems Diag data log this afternoon. Car drives great except for idle issue. When A/c turned on also drops RPM. This morning when first started idle was perfect and adjusted for a/c perfectly when turned on. As car warmed up idle started to drop to maybe 550/600 rpm when at lights etc., I can hear stepper clicking when engine turns off. I have inspected vacuum lines but have not taken them off yet, want to have a spare lines on hand incase i break them.still very drivable just want it perfect

Anyone know why people are having trouble with BP98 lately?
I've run it in my 2yo RS265 megane and 6yo JCW since new and the Megane over the last 3 or 4 months has been stalling/not starting on first push of the start button after being left overnight or after work. Second push it fires up no problems but after a few seconds revs drop and it runs rough for a few seconds and is then fine? Renault said to go to BP95 even though they stipulate 98 fuel in the manual?
Cheers
Rod

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1967 New British Racing Green Mk1 Cooper S, 1967 Lake Green 1275 MG Midget, 1969 Jet Red / Crystal White Mk2 Cooper S, 1972 Gambier Turquoise Clubman GT (ex police), 1972 Camino Gold Clubman GT, 2009 JCW Challenge Edition, Megane RS265, Clio RS220.

Just to through a spanner in the works, in the last 1-2 months I know at least 12 cars of varying brands that are having the same symptoms you have with cold start & none of the cars have used BP 98, but on advice from the manufacturers to switch to BP 98, nearly every car has started as it should within 2 tanks of BP.

Brad

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During the day I work on English designed cars & on my own time I work on English designed cars....

Brad, That's what I was told originally when I got the megane to solve that exact problem. The service manager at the shop I bought my CBR600 said if I used anything other than BP98 he'd do extremely unpleasant things to me and if I ever used shell 98 don't come near him - in fact he said if shell 98 was the only fuel I could get then push the bike home!
I'll run my tank down and try BP95 but would much prefer to stay with 98.
Cheers
Rod

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1967 New British Racing Green Mk1 Cooper S, 1967 Lake Green 1275 MG Midget, 1969 Jet Red / Crystal White Mk2 Cooper S, 1972 Gambier Turquoise Clubman GT (ex police), 1972 Camino Gold Clubman GT, 2009 JCW Challenge Edition, Megane RS265, Clio RS220.

Ok so got home last night and connected MEMS Diag.Tried to do toggle logging, but don't have right app to open it?? Was playing around with tuneview option, as I didn't think ECU is able to be tuned tried a few of the options it says is Tunable. Changed the idle recovery, decay rate and it adjusted the RPM up??? Car now idles around 850-900, when a/c comes on rpm drops and when I turn on head lights rpm drop also but not dramatically as before ?? Has any one else heard of tuning Rover ECU?

I don't think it's wise to tune your way out of it, you're masking what might become a bigger issue later

determine whether or not it is a problem (IE it didn't do it previously, then something happened and the problem started) and solve the problem

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did I tell you that I won a trophy?

yes, Rover ECUs are tunable, within limits. it's more an adjustment for differend markets. you can adjust ignition timing to compensate for lower fuel octane, and such simple things.

to look at the log i recomment MegaLogViewer, free MS edition, http://tunerstudio.com/index.php/megalogviewer
or you could use Excel, or similar as the log is basically csv/comma-separated values data. don't know is simple renaming it would work.

sound your problem is within idle control as it should compensate if you turn on A/C or lights.

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Rover 214 atm ....