Hi,

I have an 84 300d and following a valve adjustment to clear the smoking and hard starting issues it runs worse. Yet it now starts easier and no smoke. just a fast Idle and she seems to lope almost sounds like its missing. Seems to run good at highway speeds though. Someone says timing chain or IP adjustment ??? The car has over 250k

I have an 82 300sd and following the valve adjustment it runs fine! So the procedure is not new to me any help would be appreciated

Thanks

Frank