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suddenly, hard starting suddenly, hard starting
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  #1  
Old 03-31-2011, 07:23 PM
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suddenly, hard starting
Would a vacuum leak cause hard starting? My 240 is all of a sudden hard to start for none of the normal obvious reasons.

Thanks up front,
Bernie

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  #2  
Old 03-31-2011, 07:50 PM
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I can not see how. The only vacuum device motor related is the shutoff. To eliminate that just disconnect it temporarily and try to start. Far more likely is something in the fuel system or glow plug circuit.
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Old 03-31-2011, 09:04 PM
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What troubleshooting have you done so far?
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  #4  
Old 03-31-2011, 10:02 PM
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The lack of a vacuum leak would cause hard starting. The key switch is supposed to release vacuum on the shut off valve when it is turned on. If it doesn't, the shut off valve is still activated. Pull the brown vacuum line off the shut off valve and see if it starts. If it does, vacuum is not being released by the key switch.
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  #5  
Old 03-31-2011, 10:55 PM
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Quote:
Originally Posted by kerry View Post
The lack of a vacuum leak would cause hard starting.
I know that you would like to re write that sentence....LOL
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  #6  
Old 03-31-2011, 11:02 PM
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Quote:
Originally Posted by leathermang View Post
I know that you would like to re write that sentence....LOL
why? it's correct.
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  #7  
Old 03-31-2011, 11:09 PM
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So the fact that my 240d does not have a vacuum leak should mean that I am plagued with hard starting problems ?
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Old 03-31-2011, 11:17 PM
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Originally Posted by leathermang View Post
So the fact that my 240d does not have a vacuum leak should mean that I am plagued with hard starting problems ?
Yes, as long as you think of the key-bleed-off-system as a leak.
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1984 300SD 315k--daughter's car
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  #9  
Old 03-31-2011, 11:19 PM
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Originally Posted by kerry View Post
Yes, as long as you think of the key-bleed-off-system as a leak.
LOL, Wouldn't it have been easier to re write the sentence rather than make that kind of nomenclature warp ?
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  #10  
Old 03-31-2011, 11:19 PM
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Why not start with the obvious? Glow plug bad? Time to get out the multimeter.
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  #11  
Old 03-31-2011, 11:23 PM
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I assumed the 'for none of the obvious reasons' included the glow plugs, fuel, bad starter etc.
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1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
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1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #12  
Old 03-31-2011, 11:30 PM
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What is ' normal reasons ' to one person... may not have anything to do with reality......
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  #13  
Old 04-01-2011, 12:55 AM
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That's why I asked about prior troubleshooting.
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83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
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88 Jaguar XJS V12 94,xxx miles. Work in progress.
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  #14  
Old 04-01-2011, 01:04 AM
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Yeah, how do we know it is none of the obvious reasons unless we know what was checked out???
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Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (113k)
1991 350SD (206k)
1991 300D (228k)
1993 300SD (291k)
1993 300D 2.5T (338k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (265k)

Past Diesels:
1983 300D (228K)
1985 300D (233K)
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  #15  
Old 04-01-2011, 08:47 AM
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Quote:
Originally Posted by JHZR2 View Post
Yeah, how do we know it is none of the obvious reasons unless we know what was checked out???
AND HOW it was ' checked out' ...

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