When I finally decided the problem with this engine was the fuel distributor I traded some 240 D parts and got one. Its amazing how fine it runs now.

I had bid on fleabay about the same time and it seems I bought one there for 85 bucks. Now I have two. If both work, is there any special treatment/procedure to preserve the spare?

Use a lubricant that won't attack rubber. Also make sure it's a rust inhibitor as well. Wrap it up tightly in plastic then put it in a ziplock bag. If you maintain the fuel system on a regular basis with clean filters and fuel treatment like bg44k or chevron techron it will probably be fine for the life of the car. The only time I've seen issues with the fuel distributor is when the car has been sitting for awhile.

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DRIVE HARD-DRIVE FAST-DRIVE TO GET THE HELL OUT OF MY WAY.

1986 190E 2.3-16 Pearl Black!!
1987 190E 2.3-16 Smoke Silver!!
1986 190E 2.5-16 Pearl Black!!
2004 CLK 500 Cabrio Designo package!!
1994 E320 Cabrio Red with black top!!
1985 500 SEL Anthracite Grey !!
2011 Subaru Impreza STI 380HP (Yeah Baby)

Thanks.