Bosch L-Jetronic fuel injection was found on 1980 California-only wedges and on all wedges for 1981 and 1982 (except European/UK markets). The system is entirely Bosch (parts are readily available, both mail order and locally) on both the TR7 and TR8 with one very important exception. The TR8 has a Lucas-designed computer control unit (ECU). That's been troublesome and there have been a whole series of articles (both in the TR8 Car Club newsletter and The Vintage Triumph, VTR's magazine) written on how to fix it. Other questions/problems/useful facts about FI are listed below.
* Hardware for TR7 FI (cracked plenum elbows). Lots has been written about this in the archives and in the TR8CCA newsletter. There are readily available plumbing parts from your local hardware store which will work just fine! Check out Joe Gorin's nice summary article.
* Hose from air flow meter to plenum on a TR7. Substitute part now available.
* TR7 Air flow meter trouble shooting and repair
* Air flow meter tweaking and tuning
* Coolant Temp Sensor, Limp home mode. Basically, on the TR8 there is no limp home mode if your coolant temperature sensor gives out (or the wiring breaks). I'd just replace it now, before you go on any more long drives. They've about reached their useful lifetimes and new ones are not expensive. Here an ounce of prevention is worth a pound of cure!
* Wiring diagram (gif format), TR8 1980 California FI. Replaces the crummy one in the owner's manual.
* The best reference book on Bosch FI: Bosch Fuel Injection and Engine Management, Charles O. Probst, Robert Bentley Publishers, 1 (800) 423-4595.