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FridgeFreezer last won the day on November 9

FridgeFreezer had the most liked content!

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About FridgeFreezer

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    Director of authenticity

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    Basingstoke Amazingstoke, UK

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    Posting misleading answers on forums

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  1. FridgeFreezer

    MS sensors set up clarrification

    OK let's explain MS's basic closed-loop tuning scheme, built into the ECU: When you are driving, IF the following are all TRUE, the ECU will begin making adjustments: Engine temp (CLT) above 71C (as seen in the EGO dialogue box) RPM above 1200 In YOUR case, kPa ABOVE 100 (which should never happen - you appear to have disabled closed-loop mode) In MY case, TPS ADC reading BELOW 192 Assuming these settings are met, the ECU will then look at the O2 reading: It will (in your case) wait for 32 ignition events (bangs) and then: If the O2 reading is in the YELLOW section (above 0.510v), it will adjust the calculated EGO correction value DOWN by 1% if it is allowed to. If the O2 reading is in the BLUE section (below 0.510v), it will adjust the calculated EGO correction value UP by 1% if it is allowed to. It will then wait another 32 ignition events before repeating that. You can see the steps in the bottom red line in my datalog. In your case, it is allowed to go +/-10% (so EGOCORR value will be 110% to 90%) where 100% would leave the fuelling value un-changed from the fuel map + CLT + MAT calculations. This is the "controller authority" value.
  2. FridgeFreezer

    Rover 4.6 V lumpy idle then revs by itself

    Does it smell rich? What's changed since it ran right?
  3. FridgeFreezer

    MS sensors set up clarrification

    The CLT reading isn't causing a fault, it's doing exactly what's expected. As long as your sensor is reading somewhere in the right sort of resistance-temperature range I wouldn't obsess about it. AFR tables can be in a couple of places - in the ECU when used for target-AFR (voltage) with a WB sensor, or in TunerStudio where it can be used similarly OR, with data-logging / cunning maths it can do some calculations either on the data-log or live running to try and work backwards from the switch-point of the NB sensor and how much EGO correction was applied to try and bring your fuel map towards the target AFR map. However, that relies on EGO correction being active. That's how auto-tune works. If the gauge doesn't move from 14.7 are you sure the sensor is now giving a reading to the ECU? Either that or TunerStudio is choosing not to display it for some reason. When the engine is running the sensor voltage should come up as it's heated, then it will (ideally) flick/switch from <0.5v to >0.5v back and forth when EGO correction is going on normally, the bottom trace in green shows this normal driving "cruise" scenario, you can see the red trace creeping up & down as it corrects for EGO: As for the values I posted, it was only to show you the dialogue box, generally the settings your ECU shipped with from Nige should be left alone unless you have a good reason to change it.
  4. FridgeFreezer

    Just a quick chassis repair 90 defender

    What year is it?
  5. FridgeFreezer


  6. FridgeFreezer

    MS sensors set up clarrification

    OK you are confusing a few things here I think. The auto-tune feature relies on watching the EGO (lambda sensor driven) correction and adjusting the fuel map towards an ideal target. EGO correction (done by the ECU on-the-fly) is only active under certain conditions - above a minimum RPM, a minimum coolant temperature, and a couple of other factors; And there's good reasons for this to be so. If your engine never gets above 62c then maybe sort that out - have you got a very low stat in it, or no stat, or one of those restrictor plates instead of a stat? Next up - The target AFR table (in the ECU) is only for running with a wideband sensor, it cannot and should not be used with a narrow-band sensor. If you understand how NB sensors work you'll understand why this is so. Using Tunerstudio to tune towards a target table using auto-tune and/or data logs is a legitimate thing but it's a very different thing, so which are you doing? Next: Your lambda readings hovering about 14.7 is probably not far wrong, but you need to understand that a narrow-band sensor can ONLY tell you when you're AT 14.7, the rest of the time it can only tell you "higher" or "lower" and any numbers on a gauge in TS are absolutely meaningless as there is NO calibration between the sensor voltage and the AFR, only the "switch point" is accurate: The curve of that graph will vary wildly with sensor temperature, so for example 800mv output could be anywhere from 14.5:1 to 12:1 depending on numerous factors. Also bear in mind that until you have the basics right there is NO point trying to do this sort of tuning - and nor should you need to! With only very rough ballpark adjustments from Nige's base settings you should be able to get the vehicle starting & running & driving OK before you need to worry about fine tuning. If you go out and just run "auto-tune" with sensors and things out of whack you just end up ruining the fuel map by instalments. Remember - you can always just tune it like a carb/points setup by the seat of your pants.
  7. FridgeFreezer

    Euro Car Parts

    Aaah yes, if they can't grasp that it's best to leave them to it.
  8. FridgeFreezer

    Interesting industrial drill

    Sod the drill, the hydraulic press for 99p is a monster bargain! https://www.ebay.co.uk/itm/292814648308 Dodgy on/off switch shouldn't be a hard fix.
  9. FridgeFreezer

    Euro Car Parts

    You can always play the sympathy card - "Please don't make me go to halfrauds!" has worked wonders before now. Then again, some factors are just bl**dy useless/miserable and nothing's going to help you - my local MPD used to be really good, the one 5 miles up the road was the worst place I've ever been in.
  10. FridgeFreezer

    Fuel lines filters & Sedimenter 90/110

    84 is way too early for a 200TDi so must be a conversion of some sort.
  11. FridgeFreezer

    Megasquirt USB To Serial Testing - Freebie for a tester or 3

    If you go into device manager & right-click the device you should get the FTDI options for which COM port you want it to show up as, and that adapter will then always show up as the same port if it can.
  12. FridgeFreezer

    Euro Car Parts

    Yeah, I didn't say it would work every time! Try offering him a sausage?
  13. FridgeFreezer

    Megasquirt USB To Serial Testing - Freebie for a tester or 3

    I'm guessing it's this: Which is a genuine FTDI USB-Serial in a connector. Should show up in device manager:
  14. FridgeFreezer

    Euro Car Parts

    You all have dirty minds!
  15. FridgeFreezer

    Euro Car Parts

    I get a monster discount at my local GSF since I let the girl behind the counter have a guided tour of the ambulance Always worth a bit of chat and a polite haggle at a trade counter, as long as you don't make a PITFA of yourself you can usually swing some discount.

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