- 4
- 0
Help, my 85' f150 5.0 efi runs great when it's cold and warming up. Once engine is warm it will buck and kick and sputter until I let off the gas or hit the gas. At idle the engine speed goes up and down and up and down and if left alone will vary so much the engine will die. Fuel filter replaced, replaced the spark plugs and gapped them correctly, replaced cap and rotor, tested the coil, ICM replaced, new battery. Had emissions work done didn't pass, but after work done, passed with 0 co2. Any ideas? Please help if you can. Thanks.