Donald, Some suggestions:
1.) Stop. Take a few steps back and stop trying to solve the car’s (perceived) issues collectively. Taking a shotgun approach to a car that is new and unknown to you is rarely productive. 2.) Try to make a list of the issues. Pick one and resolve it, then move to the next one on the list. If you run into a wall with something, move on to the next and circle back when others are resolved. 3.) Assume that everything is messed up. Take whatever the PO told you and forget it, as it will color your opinions regarding what is or isn’t wrong. Start clean with every issue and make no assumptions until you know they’re fact. My rule is to ignore everything the PO said and start from scratch. Rarely will you find someone as knowledgeable as yourself or this group, meaning that what you’re being told by the PO is probably wrong. Observations on my part based on things you’ve said of late: Clean out the boost line from the back of the intake manifold to the vacuum control valve on the firewall and to the IP. I’m betting your lack of power is the classic “no boost” scenario due to a clogged boost line. Find a diagram for the switchover valves and get that sorted. Plug the EGR line with a BB or golf tee. Replace the worn out switchover valve levers that I’m betting are worn away to nothing. They’re pocket change from the dealer. Forget everything the PO told you about the ACC. Check the blower fuse first. It’s undersized and prone to fail. Mercedes has a retrofit kit to relocate the fuse out of the fuse box and use a strip fuse of a higher amperage. I can get the number if you can’t find it in the archives - I’ve posted it here a couple of times, cost is around $20 from the dealer. With the fuse sorted, check the system for operation. Some good suggestions on the blower motor in the event it needs brushes. The ACC controller rarely fails, ignore it for now. Your push button unit may need to be resoldered, if you’re handy with a soldering iron it’s an easy fix. Back to vacuum... There is a rather lengthy dissertation I wrote for Richarde’s mbz.org on adjusting and troubleshooting the vacuum system with the IP and transmission, I.e., modulator adjustment. If you can’t find it I’ll dig up a copy. Small steps, man. It’s like eating an elephant - lots and lots of small bites. -D > On Oct 1, 2019, at 1:18 PM, Curt Raymond via Mercedes <mercedes@okiebenz.com> > wrote: > > You can't drive it too hard, or rather if you do what broke was about to fail > anyway. A 240D has to be driven 100% almost all of the time, a 300D turbo is > babied by comparison. > I suspect your accelerator pedal isn't making the rack travel all the way. I > had that happen to my second 240D, theres a dingus that takes the back and > forth motion from the firewall and makes it up and down motion at the rack > that had gotten loose and was only moving about halfway. > > RE: smoke, you should be able to see if at dusk with headlights behind you, > no smoke when pushing hard means you're not really pushing hard... > Have you put any magic goop in it? A diesel purge treatment is probably in > order... > -Curt > > On Tuesday, October 1, 2019, 11:55:18 AM EDT, Donald Snook via Mercedes > <mercedes@okiebenz.com> wrote: > > It’s a 300D. It’s slow. But, not nearly as bad a 240D. The one time I drove > one of those it felt dangerously slow. Keep in mind, the last MB diesel I > have driven was my former 124 300D 2.5T and I remember thinking back then it > was a lot faster then my previous 123 diesel. So, maybe what I am > experiencing is normal. > > The thing I keep wondering is if the lack of black smoke means this is tuned > perfectly (and thus no wasted fuel) or is something wrong and it is not > getting enough fuel which would mean the reason there is no smoke is because > it is running TOO lean. That might explain low power and no smoke. > > One potential wrinkle I experienced last night was that the car seemed to run > tougher than it did when I drove it back from Texas. I didn’t baby it. I > wanted to see what it could do. I know the old advice is to drive it like you > stole it. But, I’m hoping I didn’t drive it a little too hard. > > Seeing all the vacuum lines is sort of giving me a little PTSD from prior 123 > experience. :) > > On another note (which is also enhancing my anxiety), the three closest > Mercedes/European shops in Memphis have said they do not work on these old > cars. I was hoping one of these shops had an old guy that would be excited > to see one of these cars because they are so iconic. > > I did find one shop in Memphis that has been around forever that I think will > work on it. > > Donald H. Snook > > >> On Oct 1, 2019, at 9:13 AM, Jim Cathey <jim.cathey.p _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
