Please take a look to http://www.bentleypublishers.com

A very informative book is

Bosch Fuel Injection and Engine Management
How to Understand, Service and Modify
by Charles O. Probst, SAE
Softcover, 8-3/8 in. by 11 in.
224 pages
352 illustrations and diagrams
Bentley Stock Number: GFIB
ISBN 0-8376-0300-5
Price: $29.95

I am very satisfied about this book.

Best regards,
Michael Vogt

86, 420SL, Type 107