Ridiculous smoking problem

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The car had a rebuilt 6bolt bottom end when I bought the car about half a year ago the car was smoking and the valve seals on the 7bolt head were going bad so I replaced it with a recently rebuilt six bolt head, intake manifold and throttle body. The car no longer smokes at idle but now smokes as soon as you give it throttle. If you slowly give it throttle it gives a little puff of black smoke followed by white smoke when it starts to go higher in the rpm’s. Pulled the plugs and cylinders 1,3 & 4 come out fine, maybe a little lean but not bad looking. Cylinder 2 comes out black and sometimes wet. Did a compression test all came out around 145 except #1 which was 139 a little lower than the rest but not bad. Cylinder 2 came out fine so I don’t think its bad rings. The turbo has a little in-out play in it but I have no experience with turbos so I really don’t know how much is too much. No oil on the intake side of the turbo and I took off the IC pipe near the TB elbow and the elbow was just as clean as when I installed it. I really don’t understand why its smoking or why the #2 plug is coming out crap.
I just got the car back together and have yet to tune it up. The idle is still high and I haven’t looked at the timing because I broke my timing gun, also I have not done a boost leak test cause I’m trying to figure out the smoking issue first. I drove it down to the corner to get some gas earlier and it hesitates just before it starts to boost, everything sounds normal to me but again no experience with DSMs so I don’t really know.

Sorry for the long post but I was trying not to leave anything out.

 

[nightspeed87]

You have a 2g and those compression numbers are low even for a 1g thats pushing the service limit...

Are you smoking oil, coolant, gas?

Oil burning thru engine= blue
Oil burning thru turbo seals into exhaust manifold= grey
coolant burning= puffy white clouds of smoke
running too rich, or boost leak= black

If you loosing oil then the possibilities of oil smoking are-

Rings
pcv valve bad
turbo seals bad
too much oil pressure to turbo feed line ( unless your tapped at the head)
turbo return line kinked not letting oil escape turbo
bad valve stem seals or valve guides f'ed up
head gasket


Do a leak down test...
But go thru that list and one of those things will apply to your situation
because thats all that would make it smoke ...

 

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The compression isn't all that bad, it's a 6bolt and the 1g service manual I have says that the compression should be 164 on a 2L turbo when new with 121psi as the service limit. Its kinda right in the middle, I know its not great but I'm not thinking that that's the problem.

I appreciate the list of things that smoke and what causes each color. That will be a big help.
Given that list I'm going to have to try and determine just what exactly the color of the smoke is, I know it's blacker when you give it the initial throttle so that would make sense that it starts out a little rich, but as for the color of the other smoke I'm gonna have to try and figure that out.

Thanks for the help, any thoughts on why one plug would be coming out fouled?

 

[nightspeed87]

If its plug number four then thats the richest cylinder because it recieves fuel first..
And plugs 1 and 2 are the last to recieve fuel so they are the leanest, even though i believe cylinder 2 runs the leanest out of them all thats why the knock sensor is behind that one... And you can have good compression and still have blow by from worn cylinder walls and rings... Try to count how many cranks it takes for the compression to reach max while doing a compression test...

I just did a compression test the other day on my gst with 5k miles and
got 155 across the board ( 1g pistons ) within 4 cranks.

Also put a 4 dollar fram fuel filter on the intake vacuum hose that goes from the valve cover to the intake arm and it will catch oil blow by and you can use it to measure the amount your using. Or just get a aftermarket catch can..

 

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Ok so some updates

Took the car for a drive to check out the smoking and try to diagnose what color it was, the car ran great with very little hesitation and almost no smoke. When I came back I checked the plugs and they all looked perfect even #2 which was previously back.

Shut it down and had my friend bring over a timing light so that I could check that out. When I turned it back on the car was idling very rough around 500rpm (hadn’t changed a thing) the timing was out and I brought it back in pretty close but it didn’t seem to make a difference. Took it for a ride and it was way down on power and hesitating really bad before boost even at very light throttle.

Brought it back home and checked the plugs again and everything looked fine even though it felt like it was down a cylinder.

I really have no idea what’s going on with this thing… are all DSMs this weird?WTF

 

[nightspeed87]

compression test...
boost leak test....