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The L03 produced 170 hp (127 kW) at 4400 rpm and 255 lb⋅ft (346 N⋅m) of torque at 2400 rpm in 1993–1995 GM trucks. This engine used the TBI throttle body fuel injection, which was a hybrid between EFI and carburetor technology. It used an EFI system with electronically controlled injectors, which were mated to a twin barrel "carburetor" body.
For the 1990 model year, GM replaced the 2.0-liter engine with a stroked version displacing 2.2 liters and using throttle-body fuel injection (TBI). Commonly called the 2.2, it produced 95 hp (71 kW) and 120 lb⋅ft (163 N⋅m) of torque. Applications: 1990–1991 Chevrolet Beretta; 1990–1991 Chevrolet Cavalier; 1990–1991 Chevrolet Corsica
It featured the same multiport fuel injection intake manifolds and throttle body as the LH0, and produced 205 hp (153 kW) at 5200 rpm and 225 lb⋅ft (305 N⋅m) of torque at 2100 rpm. Around 3,700 engines were produced each year. This engine had a block with more nickel content and hardened internals. Applications:
Iron Dukes were fitted with fuel injection (TBI, via a single injector in the throttle body) in 1982. This version was christened the Tech IV, though Car and Driver later ridiculed it as the low-Tech IV. [citation needed] Power output increased to 90 hp (67 kW). [11]
For 1991, the 700R4 was renamed to the 4L60. The TBI (throttle body injection) system used on the Blazer's standard 5.7 liter V8 had longer throttle shaft bearings, new throttle return springs, and improved fuel mixture distribution. The 5.7 liter V8 also had new heavy-duty intake valves and powdered metal camshaft sprockets.
Cadillac referred to this new TBI (throttle-body fuel injection) system as Digital Fuel Injection (DFI); this particular induction system was later adopted by other GM divisions, except on Oldsmobile V8s, and was used well into the mid-1990s on GM trucks.
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