Took it to get a compression test and it was all good until they did a running compression test. All my chambers were around 110-120, while just the stand alone test boosted close to 300.
Also, my valve cover is sucking in air!! The suction is very strong.

I'm occasionally blowing out grayish blue smoke, especially when I hit VTEC. I know I'm not doing that anymore. Any help is appreciated, I'm very stressed right now. Thanks.

 

how many miles are on ur engine and im assuming u have a gsr right?
and ur valve cover is suckin air?? how the hell...

sounds like ur burnin oil too, u must have high mileage and ur rings are probably goin bad like mine ;x

 

My motor is practically brand new!! It has about 2,600 miles on it as of today. It's a fully built LS/VTEC by Import Builders. I was told it had very high compression and was assured it wouldn't hurt my motor for everday daily driving.
I hope it's not my rings because that's why I rebuilt the car in the first place. Any other suggestions?
My car smoke like hell right after I hit VTEC.

 

The bluish smoke might be from the rings not fully seated yet. The black smoke is probably from going rich when hitting VTEC. What kind of fuel pressure are you running?

 

If your valve cover is sucking in air I would strongly suspect your valve guides on the intake side (probably both sides)

Mike