Why is your MAT reading around -17 to -20 degrees Celsius?
And yes, you are completely out of injector capacity until your other ones come in.
I dont know! i hadn't noticed that.. what would cause that? Is it down to my IAT sensor? I have the IAT sensor plugged into the connections for the Air Flow Meter, have i got the polarities mixed up? it is only 4 degrees Celsius here at the moment so it might explain the figure but the polarity is a tad strange!
Edit - I forgot to calibrate my IAT sensor... oops
You are supposed to go lean when you release the throttle. Mine cuts all of the fuel off when the throttle is released at medium to high RPMs, and factory ECUs do that also. It is called fuel cut on overrun and can be set up in TunerStudio.
It gives you better fuel economy because you don't need to waste fuel when you aren't trying to make horsepower at that point.
I didn't know you could use the air fuel meter to measure MAT. And I don't think that will work with a turbo anyway because you need to attain a temperature reading from a source after the turbo and after the intercooler. Most people use a GM IAT sensor after the intercooler and somewhere not right behind the radiator. You can drill a hole in the intercooler piping and add it anywhere convenient.
I see that makes sense! I just didn't like seeing a lean reading.. thanks a lot for all the help so far.. I wouldn't have had the confidence to try this tuning by myself or without some guidance. Its a lot of fun..
I have an IAT sensor that's threaded into the imtercooler piping near the throttle body. .. i wired it following the megasquirt fitting guide which uses the air flow meter connectors. I dont have an air flow ,eter anymore. when I unplug the sensor I get a reading of around 21 degrees, but with the sensor in I get really low and even negative readings? I have a GM sensor from diyautotune and I calibrated it using the resistances that were in the setup manual. And I did it with the car cold
Ok, i went and fitted some 295cc injectors and mapped it to 145kpa. then my duty cycle sits at 85%. but my god am i happy.. here's a log. ill be upping boost to 10psi when my 460 cc injectors arrive next week.