Drilling my way back to cheap gas.

[AndrzejM]

Originally Posted by H-Man

I can't find any way to tune a Toyota ECU so I can't test anything on the EFI side. Since my car has a manual transmission there isn't much to tune any way, I'm hesitant to mess with air fuel ratios since I would rather not burn out both of my 3-way catalyst converters with an over lean mixture.

You can always use something like Megasquirt MegaSquirt - Electronic Fuel Injection Computer by Bowling and Grippo ©2010 to have full control over injection and ignition process.

[cRiPpLe_rOoStEr]

Those aftermarket ECMs are usually good options to overcome the limitations of a stock ECM in an ecomodding project. And they're not so expensive at all, and some have an easy tuning interface.

[H-Man]

I don't want to mess with those systems since it isn't perfectly legal to do that and all of this will be going into a report.

[cRiPpLe_rOoStEr]

Originally Posted by H-Man

I don't want to mess with those systems since it isn't perfectly legal to do that and all of this will be going into a report.

Reprogramming the ECM or replacing it with an aftermarket one such as a Megasquirt is not illegal, not even in California.