|
|
|
#1
|
|||
|
|||
Why slow 1st thing in the morning?
My 85SD is terribly slow the 1st thing in the morning. Temps have been in the mid to upper 30* F. I put it in gear, step on the accelerator and the car moves slowly. I thought the trans was getting tired & slipping but the tach only goes to 1500.
It seems fine after I have driven a couple of blocks. Filter & fluid was changed this summer - perhaps 2500 mi ago. No metal shavings in the old fluid. No burnt smell in the old fluid. I haven't checked this week but vacuum measured at 18" or so the a month ago. There was a leak on the line going to the passenger side front. The line connects to a valve which also has an electrical connection. I think it has something to do with the EGR system but I haven't tracked it down in the FSM.
__________________
85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do. |
#2
|
|||
|
|||
Diesels depend on heat for complete combustion. Cold engine=incomplete combustion=less horsepower.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13 |
#3
|
|||
|
|||
Mine does that too, which is why I always let it run for a few minutes before I leave for work in the morning
__________________
1983 240D, 272K+ miles (odo broke) |
#4
|
||||
|
||||
its normal, use a lighter weight oil in the cold months and it will help, Rotella 5W-40 works nicely for me.
__________________
1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg |
#5
|
||||
|
||||
Don't worry it's normal for diesels. If you're worried about power, make sure you've done the normal turbo tune up checks, like the pressure tube/banjo bolt from the intake to ALDA which gets clogged often, adjusting ALDA, making sure you've got a good clear intake path, etc. My SD was a slug most mornings under 15-20*F. I try not to drive it much in winter anymore.
__________________
TC Current stable: - 2004 Mazda RALLYWANKEL - 2007 Saturn sky redline - 2004 Explorer...under surgery. Past: 135i, GTI, 300E, 300SD, 300SD, Stealth |
#6
|
||||
|
||||
Quote:
If it's that cold outside, I try to not start driving until the needle is at the 40 mark or above on the gauge. But that's just my rule of thumb.
__________________
Mac 2002 e320 4matic estate│1985 300d│1980 300td Previous: 1979 & 1982 & 1983 300sd │ 1982 240d “Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22 |
#7
|
||||
|
||||
Plugging in the block heater will help greatly with this.
|
#8
|
|||
|
|||
Synthetic oil is definitely a great thing in cold weather. I am not a big fan of letting the cold engine idle for an extended amount of time before driving, instead just let her idle until it smooths out, put it in gear, and take it really slow and easy until it's up to temp. I'm not sure if these engines are as sensitive as the 7.3 Fords, but those trucks tend to "wet stack" if allowed to idle for an extended period of time, especially when cold. It can accelerate wear on the engine in those larger diesel and lead to fuel dilution in the oil, after running an oil analysis on my truck a while back I was informed by the lab my habit of a warm-up to avoid icy windows was not a good practice to continue, so out came the ice scraper.
|
#9
|
||||
|
||||
Answer
Quote:
The issue may be varnish buildup in the transmission valve body. I will also note that cold temperature exacerbates/make worse any vacuum leaks. .
__________________
ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#10
|
||||
|
||||
Quote:
__________________
1981 240D 143k 4 spd manual -SOLD 2004 VW Jetta TDI 5 speed 300k -still driven daily |
#11
|
||||
|
||||
I always drive keeping it under about 1700 rpm for the first couple of miles when its cold, even when using a heater...its got enough power if you're not in a "hurry". It can be pretty slow if started at 0F with no heater.
__________________
-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#12
|
|||
|
|||
I doubt that the wealthy original owners would have put up with being told by Mercedes t o just live with it. The engine starts easily and idles smooth at least down to the high 20s. It hasn't been colder this year so I don't know how low it will go.
I'll try letting it warm up to see if there is a change. Will also deal with remaining vacuum leak that goes to the attached pic. What exactly does this thing do (front engine compartment passenger side)? Will also work through possible fuel issues.
__________________
85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do. |
#13
|
||||
|
||||
Unlike other diesels MB's don't have a cold engine timing advance... so they won't make power until the prechambers warm up.
-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#14
|
|||
|
|||
Quote:
Quote:
The owner's manual does not say to start the car and let it idle, it says to start the car and drive off. I recommend driving gently until normal operating temperature is reached, and then drive normally. If you need better performance and heat from the HVAC system during the cold winter mornings, then use the block heater; only about 30 to 60 minutes is required for that heater to do its thing. It will also reduce engine wear and generally be a Good Thing.
__________________
Respectfully, /s/ M. Dillon '87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted '95 124.131 (E300) "Sapphire", 380k miles '73 Balboa 20 "Sanctification" Charleston SC |
#15
|
|||
|
|||
I only recently bought a block heater, just haven't had a chance to install it yet Gonna try to make that happen on Sunday.
__________________
1983 240D, 272K+ miles (odo broke) |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|