Had an '84 300SD in at the shop today and the owner was complaining about very slow acceleration. So I took it for a test run and the car literally would "crawl" when the accelerator was floored. So we inspected the fuel system and found that the smaller of the two rubber o-rings on the hollow bolt that the main cannister filter screws onto was deteriorated and had blocked the inlet for the injection pump! I have never seen this before but I wanted to warn anyone who might ever experience deadly slow acceleration to check the o-rings on the hollow bolt. While we were in there we put a set of fuel filters on as well. Drove it and it was back to normal.

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Regards,
Aaron

Hello Aron
Your warning is appreciated.
Have a great day.

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ASE Master Mechanic
asemastermechanic@juno.com

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1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

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Did you replace the rings with some material other than rubber, like something less likely to deteriorate?

Two new rubber O rings should come with a new fuel filter. I actually only replace mine every second fuel filter change. Aaron's comments may make me rethink my procedure.

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Paul 1987 300 SDL; 2000 ML; '69 MGB; '68 VW Fastback