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Toyota A series engines Lean Burn

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Eugenio,77
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Nov 2004 - Feb 2017


"Which engines was equipped with LeanBurn?"

Lean Burn system (LB) was applied for some Toyota A series engines.

1984. The first application of LB (called at that time "Toyota Lean Combustion System" - T-LCS) - 8-valve engine 4A-ELU for Carina AT151 (1984-88) of the domestic market. Features: the flaps in the intake (SCV actuator), the lean mixture sensor (89463), the distributor, platinum spark plugs (1.3 mm air gap).

1987. Specific version of 4A-FE for Carina II AT171 (1987-89, 1989-92 MT) of the European market. Features: the lean mixture sensor (89463) in the exhaust manifold, no additional flaps at the intake, the distributor, platinum spark plugs.

1992. The first real 4A-FE LeanBurn - for Carina AT190 (1992-1996) of the domestic market. Features: standard oxygen sensor (89465), additional flaps in the intake manifold (SCV), the distributor, platinum spark plugs.

1992. The new model - Carina E AT190 (1992-97) of the European market with two 4A-FE engines - STD and LB. The difference of European LB: the lean mixture sensor (89463) instead of the normal oxygen sensor.

1994. New modification - Carina AT191 (1994-96) of the domestic market with 7A-FE LB. It is similar to 4A-FE LB: oxygen sensor (89465), SCV flaps, the distributor, platinum spark plugs.

1994. New modification - Carina E AT191 (1994-97) of the European market with 7A-FE LB. Features: the lean mixture sensor (89463), SCV flaps, the distributor, platinum spark plugs.

1996. Generations change - Corona and Carina of the domestic market. All cars was equipped with LB A-engines: Corona AT210 - 4A-FE LB, Corona AT211 - 7A-FE LB, Carina AT211 - 7A-FE LB. Features: normal oxygen sensor (89465), SCV flaps, DIS-2 ignition, platinum spark plugs.

1996. New modification - Caldina AT191 (1996-97) with 7A-FE LB as for Corona / Carina 210.

1997. New model - Avensis of the European market with a similar to Carina E range of A-series engines - 4A-FE STD (continental version, Linea Sol grade), 4A-FE LB (Linea Terra grade), 7A-FE LB. Features: the lean mixture sensor (89463), SCV valves, DIS-2 ignition, platinum spark plugs.

1997. Caldina generations change. The new AT211 (1997-2002) was equipped with the same 7A-FE LB, as Corona / Carina 210.

So, A-series engines with LeanBurn system were installed to:
- Carina 190..210
- Caldina 190..210
- Corona 210
- Carina E 190
- Avensis 220

All the other cars were equipped with standard 4A-FE and 7A-FE engines:
- Corona 190 (1992-96) with 4A-FE
- Corolla/Sprinter 100..110 (1991-2000) with 4A-FE
- Sprinter Carib 110 (1995-2002) with 4A-FE and 7A-FE
- Corolla Spacio 110 (1997-2001) with 4A-FE and 7A-FE
(at Corolla-based cars LeanBurn was never used)


Additional articles:
• 4A-FE LeanBurn
• Toyota engines review


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