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#1
09-09-2005, 12:13 PM
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Diesel purged and now it is "dieseling"
I ran two cans of diesel purge through my injectors and the car ran like a dream while it was running on the purge. Now I'm running it off the tank again and when I turn the key off the car runs on for a few seconds. Before I purged the engine would cutoff much quicker. I'm hoping I don't have a leak in the turbo somewhere. Any ideas? Maybe the purge just made an existing problem more obvious? Could bad injector seals cause this?
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1987 300SDL 167k 1992 Volvo 740 140k 1990 Volvo 740 250k 1989 Volvo 240 269k Anyone want to trade an old Volvo for an '87 300sdl? 
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#2
09-09-2005, 12:28 PM
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You might want to watch your vacuum pump-weak vacuum will allow the engine to run on like this.
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1984 300SD 326,997 miles and counting . . . No wait, my odometer is still dead 
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#3
09-09-2005, 12:38 PM
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Check your vacuum hoses going into the IP. Perhaps you yanked a hose while doing the procedure.
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2004 VW Jetta TDI (manual) Past MB's: '96 E300D, '83 240D, '82 300D, '87 300D, '87 420SEL
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#4
09-09-2005, 01:08 PM
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You have a vacuum shut off problem.
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1981 300D 147k 1998 VW Jetta Tdi 320k 2001 Dodge Ram 2500 141k 1979 300D 234k (sold) 1984 300D "Astor" 262k(sold) Mercedes How-To and Repair Pictorials I love the smell of diesel smoke in my hair 
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#5
09-09-2005, 01:55 PM
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Never a lack of excellent advice on here. I'll check it out when I get home and given the track record of this site it will be fixed in no time. Thanks again for the help.
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1987 300SDL 167k 1992 Volvo 740 140k 1990 Volvo 740 250k 1989 Volvo 240 269k Anyone want to trade an old Volvo for an '87 300sdl?
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#6
09-09-2005, 02:12 PM
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Quote:
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Keep everything as simple as possible-but no simpler--Albert Einstein
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#7
09-09-2005, 07:38 PM
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I think a line was loose, it's shutting off faster now. However I noticed that when I manually push the lever on the IP down the engine cuts out instantly. Is there a way I can make the car shutoff instantly on it's own? Is there something I need to clean or a diaphram that needs replacing? I can live with it the way it is but perfection is always appreciated.
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1987 300SDL 167k 1992 Volvo 740 140k 1990 Volvo 740 250k 1989 Volvo 240 269k Anyone want to trade an old Volvo for an '87 300sdl?
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#8
09-09-2005, 08:13 PM
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So I installed the original vaccum line to the IP and it's working perfectly now. I had replaced it with a new vaccum line that appeared to be identical with the exception of length, I cut it about 3 inches longer. Could that really make a difference? Maybe the ID was slightly larger and it wasn't sealing properly.
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1987 300SDL 167k 1992 Volvo 740 140k 1990 Volvo 740 250k 1989 Volvo 240 269k Anyone want to trade an old Volvo for an '87 300sdl?
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#9
09-09-2005, 08:26 PM
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These things are very sensitive to vacuum leaks, maybe your replacement tube was just a tad larger than the original. I doesn't take much of a leak to create problems.
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#10
09-10-2005, 11:44 AM
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is the connecting line to the shutoff valve the same as injector return line?
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1984 300D Turbo - 231k....totalled 11/30/07 RIP
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#11
09-10-2005, 12:02 PM
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well at least you did not have to hop out and pop the hood each time you wanted to shutoff. i know some people who had to do that for about a week before they got the problem fixed.
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81' 300SD AKA "Big Helga" 84' 300D Euro spec (Veronika) 85' 300D NonCalifornia (Heidi) "We shall not fail or falter; we shall not weaken or tire...Give us the tools and we will finish the job." -Winston Churchill, 1941 "I'll have a Chinchilla!"
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