alt.fan.landrover - The Newsgroup's Frequently Asked Questions
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http://www.rangerovers.net and http://www.rangie.com are two good places to start.
Take a look at Injection Specific Section of The GoMoG Morgan Sports Car Owners Group Plus 8 Page. Particular parts to look at are "Flapper" Injection System (Diagnosing), Airflow Meter (Flapper) (Setting it up) and Thermotime switch/cold start valave (Flapper Testin L-Jetronic) or alternatively at http://www.greenlanes.i12.com/faq.htm
Take a look at Injection Specific Section of The GoMoG Morgan Sports Car Owners Group Plus 8 Page. Particularly look at "Hotwire" Injection System (Check Procedure for the). There are also some other sections there that may help and will certainly give you a better understanding of how it all works.