The MoGolf answer will be oh so superior to my guesses. In lieu of a vacuum pump, you might be able to use a long section of clear hose, suck and squeee to pull the air out. Worksv on the VE. Long clear hose so as not to take any chances with fuel in your mouth.
Damn interweb. So it managed to distribute that air throughout. Don't know the PD engine, can you crack a line on the tandem pump to burp it?
Additional pump cycling should clear it, but how long IDK. Connect battery charger. Take your time.
I'm sure there are 98 bugs with 01m still working. They're just not good, not near as bad as the my 1st mopar minivan auto. Those failed like 98%, the 01M I'd guess is more like 70% fail rate. No reason not to use it if it works, they can sometimes be remedied (see kansascitytdi.com).
No battery silliness with these cars. Always good to disconnect the thing when working on the car, protects the electrics. Might need radio code, maybe some newer ones have "learn" functions, IDK.
Should be no relation of clutch r+r to power issue. Likely broke or disconnected a fatigued vacuum...
I've found mechanical stuff can always be fixed and body rot is always expensive. One option is to use a local vocational school, they usually work for only parts cost, but they can take forever. I've seen after market bolt on rocker things, but repairing those is a lot of work. Front fenders...
Can not find P0243 in the Ross Tech wiki. Generic search finds this-
What causes the P0243 code?
The turbocharger wastegate solenoid is shorted or has an open in the solenoid.
The solenoid connector is corroded, causing an open circuit.
The wiring in the solenoid circuit is shorted to power or...