KA24E Compression test results

[rocksteady_racer]

Ok so I finally got a chance to check the compression on my ka24e that's been sitting. So I warmed it up a little despite the horrible chugging. The compression on all the cylinders is between 120 and 130 which is obviously not 155 and on top of that cylinder 3 was smoking internally when I pulled out the spark plug, but it was sitting a while so I figured it was just a little gunk burn off. It doesn't spew out white smoke like I would expect it spews out black smoke. It won't rev past 3000 rpm either. I'm doing a total rebuild anyway just curious if anybody has any ideas by these symptoms what could be wrong with the engine internally. Or are these symptoms average of something stupid like a clogged cat?

[jspeedm]

did you have the throttle wide open when you did you compression test? if you don't have it wide open it usually read from 120-130. black smoke is fuel. if it has been sitting for a while, you might have a leaky injector and the puddle of fuel is burning off.

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if it doesn't rev past 3000rpms, most likely it's your MAF

[rocksteady_racer]

Yea that's what the dude who just called me said (bought 300zx brackets off of him). He said to ground the MAF connector to a different ground. I know it's not the MAF because I tried 3 of mine that I know at least one or two work. Does anyone know which color wire the ground is on the pigtail? That way I can patch it up. Thanks for all your help guys :)

[rocksteady_racer]

bump - Which wire is the ground for the KA24E MAF can't seem to find it anywhere.