Question My 1987 300D turbo when turned on seems to be idling at lower RPMs, it feels like its going to turn off, and the RPM pin does not move..........only after a while, and it seems loose.........any help would be appreciated.
AnswerSounds like many possible issues:
#1. Tachometer amp?
#2. Fuel filters plugged?
#3. Contaminated fuel?
#4. Idle adjustment screw loose?
#5. Rack dampener pin bad?
#6. Injectors need rebuild?
#7. Linkage out of adjustment?
#8. Vacuum routing problem?
#9. Bad vacuum shut off switch?
I suggest you join mercedesshop.com Diesel Discussion and repost this question and my reply.
http://www.mercedesshop.com/shopforum/forumdisplay.php3?f=15
There are many pages of DIY with pictures on these topics there.
Please add miles on vehicle to your post.
