The purpose of this site is to gather all possible information about tuning and modifying LH Jetronic ECU (2.4 and 2.2 variants) used on some (older) Volvo, Saab and Porsche cars. It may also contain general engine/ECU tuning information, some ECU reverse engineering tips, documentation, communication protocols, DIY programmers, tracers, dumpers and virtually anything related to engine tuning.

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