I used the Ebay stuff. I think this one.
Metallic Heat Shield Sleeve Insulated Wire Hose Cover Wrap Loom Tube 3/4" 6 Ft | eBay
I covered as much as possible. The entire length of the O2 lead cable, and the ignition cable going to my distributor I wrapped with that HVAC tape and then wrapped with wire loom. Not sure what ultimately cured the error code ills but after I wrapped those two items the fault codes went away.
