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  1. Advanced YJ Jeep Wrangler Forum
    hello, I have trouble with my jeep wrangler (1987) idle speed. I have replaced my 4.2 engine with a 4.0HO from a cherokee XJ donor including the AX15 transfercase and all the wiring. ( engin and dash ) When I start my engine it runs over 2000 rpm. When I disconnect the airtube from the map...
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