So on the M20 engine with Motronic 1.3, injectors are fired in 2 banks of 3; 1, 3, 5 & 2, 4, 6. It sounds like one of the injector banks banks aren't firing. There's an engine harness connector below the throttle body that all the injector wiring goes through. Check it for corrosion. It's not uncommon for the throttle body heater hoses/cover plate to develop a leak and it ends up dripping onto that connector.
"Howdy, Folks!"
1986 Delphin 528e - Roof rack equipped lumber hauler.
1989 Zinnoberrot 325iX Sedan - I miss this car. (Deceased)
1998 Avus Blau 328iC - Someone else's project now
2008 Platinum-Beige X3 3.0si - Current project
2012 Alpine White X3 xDrive35i - My new snowmobile.
2020 Estoril Blue 440i xDrive cabrio - This car is a blast to drive.
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