How-to: Jeep Engine Tuning and Troubleshooting Rapid advances in engine fuel-and-spark management span the modern Jeep era. In 1987, the YJ Wrangler 2.5L four became …
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Jeep engine tuning
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How-to Articles
Moses Ludel’s 4WD Mechanix Magazine – 4.2L Jeep Inline Six Tuning
by Moses Ludelby Moses LudelHow-to: Tuning the Jeep CJ & YJ Wrangler 4.2L Inline Six The 4.2L/258 six found in Jeep CJs and many 1987-90 YJ models …