R32 GTST RB20DET Crank no start - Tomei ECU?

[Murray_Calavera]

11 minutes ago, Tim32 said:

So with an aftermarket ECU it gets tuned to handle the BOV? and why doesn't an aftermarket ECU use the MAF sensor? Do they all not use the MAF? Do they just have everything programmed into the ECU?

It doesn't get tuned to handle the BOV as such, with an aftermarket ECU, you can use a MAP sensor instead of the MAF sensor. In short, the MAP sensor doesn't care about your atmo venting BOV and your mixtures will remain correct.

An aftermarket ECU could choose to use a MAF sensor, but not many people do. I haven't used a MAF sensor in something like 20 years. They are a pain in the arse to mount correctly so that the air flows through the way the sensor wants it to (in your now custom intake to suit your bigger turbo etc), they are a restriction in the intake, they have limitations in the volume of air they can accurately measure, you can't use an atmo BOV as you've discovered, etc.

 

[GTSBoy]

AFM is undoubtedly the best way to do things for an OEM, with driveability and emissions very high up in the list of priorities.

But as Murray said above, they start to become problematic for modifiers. BOVs are a particular pain point.