stevieturbo wrote: ↑Sun Oct 30, 2022 8:24 am
peckhs wrote: ↑Sun Oct 30, 2022 3:33 am
Rob Stevens wrote: ↑Sat Oct 29, 2022 7:54 am
Lambda of 1 is the default of sensor failure probably.
Get a wide band lambda hooked up to help you with the flat spot, but ask your tuner to fix first?
We do not have a lambda sensor hooked up permanently. It is only used during tuning.
Our law disallow us to weld any bung on the exhaust, so we cannot have a permanent O2 sensor, only an exhaust tip sensor during tuning.
All cars have a lambda socket these days. How old is the vehicle ?
Pretty much anything early 90's on should have it one.
Whilst crude, there are a variety of clamp on lambda options....this is one of the more expensive. Would be a relatively easy DIY too.
If you are not allowed to weld one on....this is not welded on. There are various ways to get a lambda sample without welding permanently if needed. And tip measurements at low loads are usually unreliable.
https://www.ebay.co.uk/itm/353964182100
But overall, is there an actual problem with the idle or car ? Or you just don't understand the tables ?
Was the engine tuned exactly as it would be setup and installed in the car ? or with different parts ?
It is a 89 Esprit, original on carbs.
I replaced it to EFI, and upgraded the engine components.
The cold idle is not ideal, and I cannot get the target idle of 1000rpm. It hovers around 700-800rpm before the water temp reaches above 80°C, after which it runs ok, with some hesitations from 2000-35000 rpm on the 2nd, 3rd and 4th and 5th gear.
The ignition timing at idle is 25°, which I think is too high.
The original ignition timing when on carbs was 10°BTDC.
I am not sure of the components in the rebuild engine, as there were some internal mods to the engine.
The engine builder is in UK, and I am located in Singapore.
The car runs, but it may not have been tuned to suit our climate.
We are going to do a on road tune to sort out the hesitation from 2000-35000rpm, but in the mean time when I am running in the engine, I would like to understand more about the idle control functions in the S40.
Thank you.