in some of my past posts ive talked about my vacuum wastegate problems. my turbo has never been operational since ive owned the car because of faulty vacuum solenoids that control the wastegate. i tried finding out about replacing the wastegate with a pressure controlled one like oldsouth did, but the people he referred me to were not helpful, so i had all of the solenoids (transducers) replaced.

the car worked great after i had this done, it wasnt losing any vacuum, the transmission shifted smoothly, and i had gained ALOT of power. but 2 days later, the power went away and i was loosing vacuum again. my indie ahop that i had do the work couldnt figure it out and told me to take it to the dealership, which told me i needed a new computer, for $2,100!

so $500 later im back where i started, but worse. now ive felt how fast my car can be and i want it back again. i just spent $2400 fixing my a/c so im not going to buy the new computer.

i need to know if there is any other way to make it work again. I called the people at M$D distributors again and they kind of blew me off again (i got the feeling that if its not a ford or dodge, they wont work on it)

what kind of parts do i need to switch out the wastegate? ive decided that this would be the easiest way to fix the problem.

anybody that has suggestions or comments that could help would be greatly appreciated

thanks

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1991 300 D 2.5 Turbo, 220k
also in the family:
1981 240 D 185k
1991 350 SD 185k
2006 S 500
2005 SLK 350