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Indicates a faulty MAF

My first hand experience (besides owning an in-ground AWD DynoJet and a Subaru tuning shop where I employ one of the most experienced Subaru tuners in the business - seriously he has the 3rd COBB Pro-Tuner license ever issued back in 2003) is personally building a megasquirt from a bare circuit board and having nothing but problems with that garbage. You want mine? It's collecting dust in a box along with a completely custom crank and cam trigger simulator you can run with a cordless drill for the EJ..... And as far as piggyback controllers - all those do is attempt to "trick" the ECU into giving more fuel or changing timing, etc - which is never a good idea since you are meddling with a closed source system for which you can never be sure of the unintended consequences. And "fine tuning" an EA82T is an exercise in blowing them up. They were unreliable heaps of trash as they came stock (besides being under-powered) and you'll fail at accomplishing anything worth the expenditure on the equipment to do so - just as hundreds of people who have come before you have failed. They are a GIANT waste of effort. But if you insist at least get something you can use on an EJ when your stubbornness gives way to reality and you finally hear my words of wisdom and experience. GD

Here is my compilation of CTS data - Subaru CTS temps.rtf

I check the CTS with an ohmmeter. Run the engine till normal operating temp. Shut off. Log the temp immediately, and several time on the way back down. If you don't have one of those IR thermometers, a meat thermometer works, just have to mechanically connect its sensor to the block. Fill one of the unused holes with grease, stick it in kind of thing. I have a few threads with temps vs ohms I made from values I collected of the years. That other small sensor looks like the one on my CA car - it just verifies that the EGR is actually opening by measuring the heat in the passage.

Use to pull them with the forklift at work. I could hold the engine an reach the controls with my raised leg to raise and lower the engine. Not ideal, but if no one was available to operate the forklift it worked. Those days are long gone, but were good ones.