96 FZJ80, 240k ish miles. Baseline now. The wires look/feel original. IMO it ran pretty well before the new plugs, installing now and will update later. Replacing plugs, wires, rotor, cap, and intake tube.
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Get a Blackstone labs oil analysis. They will tell you if there are traces of coolant in your oil. Also you can rent a kit from autozone that tests for combustion gases in your coolant for free.99I'm not sure how lung these plugs, wires, rotor, cap were on. I've out on about 2000 miles since I bought it earlier this year. I'm assuming the O2 and exhaust is the next on my list to replace, defintely not the best condition. I've replaced most of the vacuum lines, deleted egr, new pcv and hoses, new intake hose, new oem filter. It doesn't really burn oil, I haven't had to add any since I changed it about 1000 miles ago. It drove fine before the tune up-no misses, although now it definitely idles smoother and more stable. the only code I had was p0401 which was fixed with the egr delete. I'll have to check the plugs again to see what they look like. I need to do the fuel filter as well. Thanks everyone, I'm glad that the first response wasn't "I think its your HG." I should have clarified that ran well before tune up, even better/smoother now. I am unsure about the HG, it's always on my mind since I'm nearing 260k miles, but so far so good!