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#1
01-31-2008, 05:02 AM
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Hard to start when engine is cold
I've run into a recurring situation with my '85 300TD. It's hard to start when the engine is cold. The outside temperature does not appear to make a difference. When the engine is warm there is no problem.
If I pump the fuel primer pump about 50 times the car will eventually start when cold. I've performed a valve adjustment, replaced the fuel filters, and verified the battery but this doesn't appear to have helped. There is nothing leaking onto the ground. Any suggustions as to the problem?
__________________
JWJ 1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG 1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG Biodiesel, Mobil Delvac 1, and Viton fuel lines! 
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#2
01-31-2008, 05:37 AM
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compression test?
__________________
 Current Mercedes 1979 maple yellow 240D 4-speed Gone and fondly remembered: 1980 orient red 240D 4-speed Gone and NOT fondly remembered: 1982 Chna Blue 300TD Other car in the stable: 2013 VW Jetta Sportwagen TDI / 6-speed MT
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#3
01-31-2008, 05:49 AM
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Quote:
Wouldn't a compression problem start small and get progressively worse?
__________________
JWJ 1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG 1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG Biodiesel, Mobil Delvac 1, and Viton fuel lines!
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#4
01-31-2008, 06:22 AM
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Sounds like glow plugs that need to be checked for resistance, and voltage. They can fail anytime.
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83 SD 84 CD
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#5
01-31-2008, 07:59 AM
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Quote:
__________________
JWJ 1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG 1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG Biodiesel, Mobil Delvac 1, and Viton fuel lines!
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#6
01-31-2008, 08:52 AM
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Yes. If you have even one bad one in cold weather that will translate to hard starting and rough running for a minute after start up.
Tom W
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#7
01-31-2008, 09:33 AM
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Quote:
John
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Certified Registered Nurse Anesthetist (CRNA) 2002 F250 powerstroke with Plantdrive WVO conversion 1983 300SD 190K miles ,sold 2006 E320 CDI
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#8
01-31-2008, 10:28 AM
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Could also be an air leak in the fuel system if it starts after priming.
__________________
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
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#9
01-31-2008, 01:22 PM
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is your clear filter full of air when you go to start?
this sounds like classic primer pump leaking. I bet you park your car with the nose up. try parking it with the nose down, I bet you get a puddle of fuel under your primer pump.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#10
01-31-2008, 05:55 PM
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what's that book quote from? i think i need one to lust over so i can find something to fix on mine?
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2004 Infiniti G35 3.5L 6mt Coupe 73K miles 25.6mpg ytd 2001 Green Audi TT 225 AWD Roadster 71K 6sp 30.9mpg >>STOLEN<<  1982 300D Turbo 231K 120hp? 28.1mpg YTD
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#11
02-01-2008, 02:11 AM
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Quote:
Is there a way to check for air leaks?
__________________
JWJ 1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG 1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG Biodiesel, Mobil Delvac 1, and Viton fuel lines!
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