06/01/2025
Been slow posting some of our work. Had a 97 Ford van with the 5.4. Thing could barely get out of its own way. Has 156k. Started with a tune up. Several cylinders were misfiring. This has all original plugs and all but one coil was original. Replaced all plugs and coils. Spark plugs I took out had a gap of .90 or more. Spec called for .54. there you go. Problem solved.
Now the thing runs great, so get out of its way.