TPS readings??
Turbo Mini Forums

Heres the layout of the maps, if somebody could explain how they relate to the engine running Id be very grateful. I have also included a graph of the AFR, there are 2 widebands on the manifolds.

Humm seems the attachments dont work?

Edited by ciaran on 27th Jun, 2011.

Attachments must use lower case letters on the extention for the file, for example. ABC.jpg rather than ABC.JPG

Or, instead of trying to "attach" photos, host them elsewhere (like Photobucket or any of the other free ones) and just use the IMG link.

For running rich, although you questioned the ignition timing on the previous page, ignition timing has very little effect on the AFRs.

It is more likely your basic "required fuel" value and/or the VE tables are not set right.

I'm totally UN-familiar with Canems but does it have an "auto-tune" or "learning" facility where you connect the wideband reading back into the ECU and it does the basic re-write of the VE table(s) itself ??? (most modern ECUs do).

Schrödinger's cat - so which one am I ???

Ignition Map


Fuelling Map



Data Log showing AFR:



There is an option to use the feedback from the Lambda sensors, you can use it to work to a target AFR map or just to used the sensor to target, although Id imagine youd get some fairly interesting oscillations if you just used the sensor.

I think it may be learning as its running alot better each time I run it, but its still not there yet, although It hasnt seen over 4K RPM.

Edited by ciaran on 29th Jun, 2011.

First, now that you're talking fuel maps etc, I would suggest you ask one of the Forum Mods to move this into the EFi part of the forum, or start a completely new thread in that section...

BUT, looking at that bottom data plot, if I'm reading the colours right, you have AFR2 close to target but AFR1 is mostly off scale LEAN..........

You say you have two widebands - I assume one monitoring the outer cyliners and the other, the inner cylinders ??? Which is which ???

As I've already said I know next to nothing about Canems, the only thing I know is they claim to be able to equal the AFRs outer to inner by using a semi-sequential system. Paul, myself and a few others found that using a fully sequential system (code written by Jean to run on a megasquirt) gave us the best solution for matched AFRs, semi-sequential just didn't work for us.

But I have to say, if those readings on your last plot are genuine, I have never seen them that far apart even during testing with a HIF44.

If you really do have one pair of cyliners running at 20plus AFR, do NOT exceed 4kRPM or put any load on the engine until you find out why, or you will have two melted pistons.

Schrödinger's cat - so which one am I ???

Right Ill start a thread in the EFI section and move it all over there.

Humm for a rebuilt engine this isnt good at all, Im going to have to take a look around, Ill get back to you on which sensor is which, there is one on the centre branch and another on the outer branches (mounted just after the Y)

I think the graph may be a little wrong as when Im driving the car with the laptop beside me, the AFR1 and AFR2 aint a million miles off, certainly not as extremely lean as 20:1, I have no Idea what the Y axis is ment to be at all, what the graduations are, although it is obvious the fuel balance is miles off

The plugs also dont point to lean running, they are indicating a rich mixture, the richest being 2 and 3.

Edited by ciaran on 29th Jun, 2011.

Fair enough, in which case you need to find out why you had a 1 minute run (I'm assuming the bottom scale is seconds) when you took this log with one AFR mostly above 20.

I'll pick it up again once in the EFi section.

Schrödinger's cat - so which one am I ???

Cool, I had it out for a 15min drive there on a the same route as the one taken above, the results are interesting and back up what you mention above, however.. when I check the AFR when I was stopped at the lights they were both rich, one was 13.4 and the other 11.5 (ish, they were jumping about).

Ill post that data log in the EFI section.

Do you know what we really need? A thread in the "show us yours" section.

Be nice to see this install.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

When its not looking like it was thrown together in a mad rush Ill stick up fotos :p