Horrid amount of codes, poor boost development

[s70glt novice[Will]]

So... I've had a CEL for a while, since i got the car. I finally picked up a pocket scanner, and scanned...

Ive had poor boost development that i originally thought was the tune (ARD Green) from being wonky cause of my weird setup.

but then it got worse...it went from about 4-5 psi at 3k to the same and 3500 rpm...

Here are my codes, I've looked up all of them, but theres a couple i can't get an answer to.

po245
po445
po448
po135
po131
po141
po136

I reset them and within seconds of starting the car, three come up again (245, 445, 448) and then rest show up after some driving.

The car feels lazy and slow sometimes and scary fast others...

Any suggestions for the codes? Fixes?

Thanks in advance

[D_V_ENT850R]

I'm chasing a P0131 code myself. ARD green tune, start driving P0131 throws. Had my wideband running my O2 signal with stock ECU no code for 1 month. Install tuned ECU codes immediately. Tried programming my wideband output from narrow to wideband and now I get P0132?? So I need to figure that out. I upgraded to 4.4 how about you? As the others I'll look at them and see what I could think of to have you test and look at!

[erikv11]

I have read of a similar set of codes a few times before, give this a look:

https://www.matthewsvolvosite.com/forums ... =1&t=43634

Kinda cryptic I know, hard to know what to do but electrical grounds is worth a look. If (when!) you figure it out be sure to post a solution, I am curious.

[s70glt novice[Will]]

Okay, electrical issue. read up on those threads, sounds like my b+ cable. My headlights dim when i roll up my windows, and so does my interior lights. All of them, even the radio/boost gauge/temp, mileage.

Thanks for the help, thoughts?

And D_V_ENT850R, 98s already have motronic 4.4. I'll let you know if i fix it. My theory as of now is that ARD Green requires better electrical management. Which some of these cars dont have because of age.
Probably completely false, but you gotta start somewhere. thanks again

[s70glt novice[Will]]

Battery died this week. Got a new one, dimming is gone and most of the CELs (only evap and PO245 left)

Maybe it was the battery going....keeping my fingers crossed and will update.

PS: I did check the B+ volt drop, nil.

[s70glt novice[Will]]

Codes came back. Almost all of them (7) but i think the last just didnt trip, and i haven't checked since. Looks like the fault codes are, in fact, indicating faults.