I don't believen you adjust the ignition timing on these motors after a quick Google search. I've checked the firing order a few times (1342) with no luck. I'll have to check it out for vacuume leaks next.

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84 300sd 2.47 dif 360k
26 mpg needs lots of love
given to me in pitty

89 civic hatchback auto 140k
33mpgs soon to be low to mid 40's
been in the family since mile 1

85 300d with unknown knock. driven over 30k with knock and still going. sold for $800