Sensor grounds and compression

[js959]

hey everyone.
first thing, with ignition off, all my sensor ground wires have good continuity, but when i turn the ignition on resistance to ground raises some. maybe around 7-8 ohms. my MAF ground wire though goes up to 28 ohms of resistance when back probed and about 18 ohms unplugged. and i'm having some trouble depinning the maf connector, is there a trick to this one?


and the compression question.. what should my compression be with oem headgasket and 8.8:1 compression ratio pistons in a ka24de.

[greenman100]

130-150psi, same as an 8.5:1 SR20.

You can't measure resistance with current already flowing through a wire.

[js959]

just confirming my thoughts with someone elses on the compression thanks.

the one thing i suckkk at is wiring, but we're talking about a ground wire right?

also, i've depinned the ecu connector and knock sensor connector, but i can't get the maf connector depinned. can anyone help out with this one.