Im having troubles with my 1999 Ford Focus 1.8 Petrol. Sometimes when i rev higher than 4000 revs the car loses all power and feels like its run out of petrol. If I then ease off and drive really softly it seems to come back to life again until I rev high again.
No lights come on the dash when it does this to indicate a problem. I have replace the coil pack, leads and plugs but its still happening.
Any ideas ?
Thanks in advance.