hello, what is lac witch tube is this?

put pcv line infront off throttelbody ,and plug it on the manifold,

egr connects behind intake manifolde metalic tube ,

have just taken the kids to school and car runs good, havent sorted out the tubes jet, I wonder all them vacuum lines going to tb and intake manifold, would it not be good to cap them all and move them closer to wards air mass flow meter.? Whitch ones are passive, what does passive mean?
Thanks upfront

Passive is air coming in before throttle body air cleaner side, after throttle body is strong vaccum. Iac is Idle air controll this is the air fed to engine just for idle. If your experimenting on your own vehicle you could move some vaccum lines around, allthough don`t cut vaccum such as brakes or emmission control, we don`t violate the laws of the states or fed govt. It may be different in Sweeden, if so go for it and keep us all posted. Never lose vaccum on the brake system. Safety first. Dan gadgetman Mo.

Just came back from MOT and emitions were at idel CO 0.2 (0.5)max. HC 041 (100)max .CO2 12.1 . O2 3.91 lambda 1.01

at 2500rpm CO 0.3 (0.3)max. HC 28

And this is with a small exsaust leak before the cat and lambda, shuld geet better when repared, will also do some more vacuum work, Shuld get a vacuum hand pump this weekend. weld the exsaust and carryon to reprogram ecu.
Thanks for all help doing this mod, Oh je I am experiencing that the gears are changin earlyer and that there is more power, Will try to improve even more. Thanks and best wishes to all from sweden.

Sounds like you`re on your way. Do the mods! Dan gadgetman Mo.

This is GadgetmanNebraska, I performed a groove on almost an identical vehicle in Colorado and the horsepower difference was phenominal.

The persons name was Dave Ireland, and he reported that it had gained 5 miles per gallon and no longer downshifted on hills.

I will have to say I've done nearly 60 mods and your first groove pictures look very good.

You should get very good results. We are still learning about what all the vacuum lines on these Volvos do , but I see Dan and Tacoma Carl have been a great resource for you.

I am very proud of the family of Gadgetmen and women and if I can be of any help to you I will do all I can do assist you also.

Sorry I have not talked to you sooner but my computer has been giving me troubles.

Great job and beuatiful pictures on your first groove.

Hope to see many more in the future from you. You will be a great addition to our family. GadgetmanNebraska Aron Cheek

Here it is my new tool a handpump vacuum tester, I tested the lines on tb and the big hose well bigger hose from gas fumes kanister leaks, and a small one on back of intake manifold going to a valve on colling liquid going in towards cockpit,
I will plug the one going to that valve, I dont know what its purpuse is. And the one on the tb I will plug it and move it to a passive place ,