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International Automotive Technicians Network
Re: Galloping Jimmy
Posted to Technical Discussion Forum on 5/7/2002

Hi Michael,

A new production PROM for all 91 Jimmys (Fed & Calif) was installed for a low idle and lean air/fuel ratio on start up. I'm unaware of any to correct a high idle concern. I would double check the PROM ID and broadcast code for proper application.... Login to read more.