Hey guys I have a customer with a 97 jeep wrangler 165k miles 2.5 it will start bucking and is using more gas than usual. setting a lean code I have replaced injector o rings as they were source of vacuum leak. also replaced tps and map sensor will run fine until hit open road and starts acting up and engine light comes on always a lean code. I cannot find any vacuum leaks
any ideas??

Cars & Trucks - Jeep - Wrangler - 1997 Jeep Wrangler