As a suggestion, you might want to increase your idle speed regardless, as the IACV doesn't seem to be able to control as quickly as the ECU. For example, driving slowly down a hill in 1st gear, with momentum driving the engine, there will be virtually no fuel. If you push the clutch in, the ECU won't try and catch it until 800 rpm, at which point it's probably too late and the engine will stall. I'm not sure about the Emerald, but normally you can set your idle speed up like this:deggles wrote: ↑Sun Apr 11, 2021 5:36 pmwinthattt wrote: ↑Fri Apr 09, 2021 12:31 pm You have my map(s) now. Enjoy. I had a quick look at the maps and I would play around with the three choices. I think the maps are the same but I was messing about trying to get good idle control over temp/pressure/loads and gave up. Map 1 is fully open loop and does not use the IACV or ignition advance, it's a race car map!
Thanks again, had a play this afternoon and got your map loaded in, drives pretty well although haven't given it a full-beans run as it's been snow flurries on and off al day . Best results seemed to be:
* stick to open loop at all rpm - I did have it set to run closed loop at light throttle and low rpm, which is mostly where it was misbehaving and popping excessively
* IACV enabled below 1600rpm which helps the idle - it was around ~800rpm without which felt a bit low
* no fuel cutoff on overrun, oddly it's less pop-and-bang-y this way
As suggested I should really get the timing properly checked, that's on the list along with checking for any exhaust leaks which might be contributing to the popping.
Start the engine and let the car warm up until engine reaches 'warm' idle (normally around 1250 rpm with a code reader with standard ECU).
Increase the idle speed screw until the engine speed just starts to increase. This will make the IACV close further with each adjustment as it tries to maintain 1250 rpm, until it is fully closed at which point the idle speed rises.
Turn the idle speed screw back sightly until speed is back to 1250 rpm - IACV will be almost fully closed at this point.
However, I believe a lot of people just ditch the IACV altogether!