Recently my landrover ran out of gas while my girlfriend was driving it and she put 87 oct. in the tank by mistake. the same day i decided to perform a tune up on my 4.0L and when i finished my work and left for a test drive it was tapping as if it had carbon build up? or a lifter could have worked its way loose? any suggestions?

 

E-Mail me your tele number and I'll call you tomorrow.
Mike