I guess It will not hurt to check lambada again after all the repairs, in theory it should be still the same.
How about changing the "air tubes" and seats for the injectors. Since you will have everything removed it would be easy to change these. I know mine are very hard and brittle, 17 years has taken a toll on these and I am always afraid to work around them. I will change them one of these days.

Good luck on all of your repairs.

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87 420 SEL
Looking for a nice mid 80's MB diesel.
87 BMW 528e (Sold)
99 TOYOTA 4Runner
1989 Honda Accord (Sold)
1988 Honda Accord (Total)