so my 1.8 turbo started loosing power like some one stole the turbo ! having only started driving car this week new to me it was running pretty good then bam no power but still running smooth so took by buddys shop to pull codes and i think every code that had ever been on car was still in it. dont know what they were just to many and kinda in a hurry cleared codes.so drove car and retested after 30 miles.two codes came up 1st was cat. converter in effective 2nd a/c charge to high. so the exhaust was rattling so we figured cat was coming apart.cut it out and coming apart was undestatement.was pluged up with all the broken pieces so knocked out the junk and put it back in the car hollow.still drove the same no power.and the ABS light has been on during this whole process the car needs brakes bad but have to wait till payday.i work on rvs for a living and sometimes when they have brake issues they will go into limp in mode with no power.so i tried taking battery cable off bug to reset and it worked power back ran great for 10 miles then back into limp in mode.have done this three times with same results.
if there is an issue with the brakes and maybe bad ABS sensors will this throw it into limp in mode???
im hoping this is the case

where would you unplug the abs at???

have not been able to check for codes after limp in mode due to me working and my friends shop is closed by the time i get home.will try to unplug it.what does the turbo solenoid do?

If the computer doesn't like what it sees it will limit the power ,  also could be the boost sensor

It would help to know which vehicle and year you have and any pictures may be helpful

hooked bat back up and test drove but still just falls on its face after about mid throttle then its just flat..no power will accelerate just not like it should