Leaderboard

Throw away the AOS. Those are for idiots and people with blown engines. Buy all the factory PCV and breather hoses and put it back to stock. Make sure the turbo stay brackets are in place. If those are loose or missing it can lead to flexing of the oil supply line to the turbo and they can crack. Also if you don't know the origin of the tune - get it properly pro-tuned on a dyno before a previous owners bad decision claims your rod bearings. GD

small clarification In the late '90s, they transitioned to a single 3-wire sensor, which still performed like 2 separate sensors (2 wires for the ECU, single wire resistance-to-ground for the gauge). And then around 2008, they transitioned to a single 2-wire sensor only feeding the ECU, which then outputted a signal via CAN to the gauge cluster. Yep, you can use your EA81 sending unit with a little modification. Or you can wire a resistor in to modify the EJ signal for the EA dash (I know this works on the EA82s, I think the EA81s as well). That's in my write-up. Or, just wire the EJ sensor to the EA gauge, and it will read about 1/2 what it used to, but will still give you some information.

Yeah, I know what I'm doing. Engineer accustomed to working on and around dangerous things, etc. Jig it up so it's not going to be inclined to exit in any direction, and only for the purposes of compressing a couple of inches and seeing if the readings that come back make any sense. In this case absolute accuracy isn't even important, as the measurement will tell me whether I can expect a relative improvement between one spring and the next.