Thanks for that, but i sure wish someone would respond to my original questions.....anyone? please :) 1. What does the EGR do? Is it necessary and what are the symptoms of one failing? 2. Are there some tests i can do to see if it is the EGR valve or the EGR vac booster that is failing? 3. Are there...

For what it's worth - the guy i bought it from said that he cleared the codes and took it to the emissions shop and it passed......even though the EGR must have been faulty then too. I'm not sure i believe him. Any thoughts on passing emissions even with a temporarily cleared EGR fault?

Hello guys - So i just purchased a 1993 940 turbo with 125k miles. I paid $1900 in California and i'm happy with the car so far. Fuel pump was leaking, and i just replaced it. Lambada (check engine) light has been on since i got the car last week. It's throwing OBD fault 4-1-3 from port 6. There was...