Changed O2 Sensor removed Hot Air Pipe now Smoke???

[lummert]

ya know I read about that issue when I was first trying to diagnose this car, I did change the ignition module with a new one and just went out to make sure it was plugged in completely started the car up just to see if anything changed, nope still surging when I idle, I do know that the coolant temperature sensor is bad, and I need to replace that, I need to find a big enough deep socket to fit it, I can't get a crescent wrench in there because of the knock sensor in the way, I'm planning on spraying some carb cleaner all over tomorrow too see if I can find a vacuum leak I'm just out of ideas I thought the MAF would fix this issue, atleast it's driveable now before it wouldn't want to go above 2k rpms now it really has alot of pep, as long as I don't idle this thing cut out on me in the middle driving before too, that's why I rarely use it except for short trips, it's really a shame I love this car and want it too work I live in a small town so no one works on volvo's here and taking it to the nearest shop is too scary to drive 30 miles on the highway in this condition if it breaks down I'm done. Do you think the coolant temp sensor could be causing any of these issues or do you have any other ideas, I'll tell you what I've done so far

Replaced:
Ignition module
Complete PCV system including oil trap box
Hoses that come off the intake to the A/C
Brake booster check valve and brake booster hose
MAF
Air filter
Fuel pump External main pump new oem bosch part
fuel filter
Spark plugs and Wires are new
Tightened all hose clamps focusing around turbo area everything is good
checked air intake hose for collapsing effect, seems to be good

I know I need to replace the Coolant temperature sensor and I think there is a vacuum leak I've spent a ton of money and still haven't fixed this surging issue it really sucks. oh btw the car has about 176k miles on it so most of those parts needed to be replaced anyways I just wish I could get this thing working right.

My 88 760 Turbo Wagon has 237K miles and I still find original parts on it from time to time.