Well, recovering from a week on holiday in the Mini
Covered 1200 miles with only a few minor issues, none really to do with the ECU.
The only real issue was that the engine decided to stop of its own accord, and not restart. This was in the second lane on the River Avon bridge crossing on the M5, on the up side, in busy traffic
what fun. Managed to push the car and trailer
over to the hard shoulder and set about working out what the problem was. This was also the time i noticed the screen started to play up. anyway, cut a long story short, swapped out the injector fuse and we were on our way.
During the week I left the VE learn on and encountered virtualy every driving style, from motorway, round town crawl to single track roads only wide enough for the mini
with lots of first and second gear corners, hills of varying degrees and length. The VE table is now pretty spot on, though the numbers look a little low and flat. I suspect this is as a result of using a low ohm injector with the resistor, the characteristics of the injector are some what different now. I intend to half the req fuel and double the VE values to give a little better resolution, before trying the PWM, for which im going to try and get hold of some accurate information.
Acceleration enrichments were an issue with AE happening where not required. The mini is quite a bumpy ride and what you would consider a steady foot, is actualy inducing AE with the suggested Acceleration Bins 1 5 20 40. Changing the first two bins to 3 and 7 as suggested by dnb seemed to sort this. The hard acc amounts still need tuning.
Idle is pretty steady though i had to set the idle speed to 950rpm due to the ultralight weight flywheel and high compression. I have been playing with the EGO numbers to get the lambda to be fairly constant only fluctating about 0.07 max above 1.00. It never seams to go below the 1.00 even with the target at 1.00, i assume this is to do with the wideband lambda sensor PID??
Im still encountering the over run situation but no to the point of stall. I have tuned the engine so that its reasonably OK with no load, but in the recent weather with the heater, the wipers and lights on, it is a problem. Idle drops to below 800rpm before the idle PID activates the stepper from its lowest position after over run. Stepper speed set to 5 wich is bloody quick. IT is a problem!!!
Its not how the OEM working and i feel it needs resolving by the powers that be
Other than that system works a charm
Over the 1200 miles 650 of those with an extra 300kg payload/trailer fuel consumption averaged 36mpg, remembering that this has a 3.76:1 final drive where 60mph is 4000rpm. I dont think that is bad considdering the extra weight and is only down 2mpg from the OEM ecu without the extra weight of the luggage and trailer
Oh, one thing a really do need to sort is the coolant temp bins, or at least double check. The engine temp when driving is 80 yet i know the cooling fan switch comes on at 97, the VEMS indicates 86. TBH i havent realy calibrated this, oopsie
this will no doubt screw up all my crank, afterstart and warm up enrichments, after getting them pretty spot on
Im gooing to also have a play with full throttle shift and launch control whel i get the clutch switch fitted
still ongoing
