Nov 2004 - Aug 2005
Question: What engines was equipped with LeanBurn?
Lean Burn system (LB) was applied for some 4A-FE and 7A-FE engines. Let's look specifically...
Japanese domestic market
- 1987. In the second half of 1980s Toyota set the new 16-valve cylinder head ("narrow twincam") to early 4A-GE engine, launching a production of motors 4A-F (carburettor) and 4A-FE (multipoint injection). Simultaneously Toyota made smaller 5A-F / 5A-FE. 5A-FE is excluded from further consideration - it has only standard version (STD) to the last hour. Then begins the production of Corona / Carina T170, which was equipped with 4A-FE STD.
- 1991. Corolla / Sprinter E100 family production started, equipped with 4A-FE STD.
- 1992. Corona AT190 appears - equipped with 4A-FE to the end. At the same time Carina AT190 production started - with 4A-FE LB engine. Features of the first Japanese LB: a conventional oxygen sensor (89465), additional flaps in the intake manifold, distributor ignition (till 08.1994 with separate coil, then with integrated one), platinum spark plugs (1.3 mm air gap).
- 1993. Toyota built first 7A-FE engine.
- 1994. Since 08.1994 Carina 190 received 7A-FE LB engine, similar to 4A-FE LB (89465 oxygen sensor, flaps, distributor with integrated coil, platinum spark plugs with 1.3 mm gap).
- 1995. Corolla E110 production started. Except 4A-FE STD on of its version (Sprinter Carib AE115) was equipped with 7A-FE STD engine. Normal, without LB, without flaps, with distributor and conventional spark plugs.
- 1996. Corona / Carina model updated to T210. All cars was equipped with LB engines: Corona 210 - 4A-FE LB and 7A-FE LB, Carina AT210 - 7A-FE LB. Caldina 190 was also equipped with 7A-FE LB. External changes - DIS-2 ignition system, platinum double-electroded spark plugs with 1.3 mm gap. Conventional oxygen sensor 89465, flaps in the intake.
- 1997. Corolla Spacio (AE115N) with 7A-FE STD production started. Caldina 210 production started - with 7A-FE LB (same as for Corona / Carina 210).
Further, no changes in the range have been made until production end.
- 1987. Carina II AT171 - the first car with 4A-FE LB, but a particular type: with Lean Mixture Sensor (89463-) in the exhaust manifold and a conventional oxygen sensor downstream, without flaps at the intake manifold, with distributor and platinum spark plugs.
- 1991. Corolla E100 with 4A-FE STD production started.
- 1992. Carina E AT190 production started with 4A-FE STD (mostly for continental Europe) and 4A-FE LB. European LB beside to Japanese is equipped with lean mixture sensor 89463 instead usual 89465.
- 1994. Carina E was also equipped with 7A-FE LB.
- 1995. Corolla E100 was equipped with 7A-FE STD.
- 1997. Avensis AT220 production started with a similar engine range as Carina E -- 4A-FE STD (continental version at Linea Sol grade), 4A-FE LB (Linea Terra grade) and 7A-FE LB. Features of the updated European LB - DIS-2 ignition, flaps, 89463- sensor, platinum spark plugs with 1.3 mm gap. In the same time Corolla 110 production started with 4A-FE STD and 7A-FE STD.
- Corolla / Sprinter family was equipped with standard engines only (without LB)
- Corona 190 was not equipped with LB, Corona 210 - received LB
- Carina 190 and 210 was equipped with LB
- Caldina 190 and 210 was equipped with LB
Note about "platinum":
Why, even throwing away damaged by low-quality local gasoline plugs every 10.000 km, some owners are fixated on the idea "use only platinum"? - One of the main reasons of "platinum" appearance - DIS-2 system provides flash twice as often. So Japanese prefer not to cut replacement interval in half, but use four times more expensive plugs. It makes sense to pay attention to the nominal air gap. Alas top-manufacturers do not produce non-platinum plugs with hex-16 and 1.3 mm gap, but why not to bent slightly electrodes of BKR6EYA11? Moreover, AT210 with 4A-FE LB owners no need for tweaks...
• Toyota 4A-FE LeanBurn
• Toyota engines review
• Lean Burn visual differences
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