tireman
Dedicated LVC Member
just replace everything and keep driving
if you have over 100K on the coils and plugs, just replace everything, new coils, plugs and valve cover gaskets. Then you're all set for another 100k miles. I used ebay coils, autolite platinum plugs and felpro gaskets from rockauto. Also check all vacuum lines for cracks, this will also cause rough idles and stalls. My 01LS runs great 114k.
if you have over 100K on the coils and plugs, just replace everything, new coils, plugs and valve cover gaskets. Then you're all set for another 100k miles. I used ebay coils, autolite platinum plugs and felpro gaskets from rockauto. Also check all vacuum lines for cracks, this will also cause rough idles and stalls. My 01LS runs great 114k.