I havnt seen you in MBCA technical in a long time.
Well, how much have you put in the car so far? From what I remember I think it was a lot. If you invested a lot into the car already, and like it a lot, and dont plan on ever getting your money back out of it (selling it I mean), then fix it.
I would say sell it, find another one. How much is your car worth? Honestly, if you do put that much money in your car, do plan on keeping it. You will not be able to resell it and get your money out of it. I have seen 87 126 models from $4,000.00 to $8,000.00 in St. Louis. That is about what they are worth here.