91,000 miles, 5.4 liter engine. The service engine soon light stays on. The problem keeps saying problem with cylinder 8. I have changed the spark plug the fuel injector the coil for cylinder 8 change the gaskets thinking it may be a vacuum leak switched coils and plugs checked compression and nothing works. When I have done any of the major repairs like gaskets or injector the light stays out for about 135 miles but than it comes back on. Do you have any ideas or have you ever seen this problem before. Thanks for any help.
have the same problem?
Saturday, April 14th, 2007 AT 11:19 AM