Sludig
Potato del Grande
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Coils and plugs I could easily do myself. But again wife is irate/panicks and goes for the get it done now no matter the cost route.The "tune up" is usually the colloquial name for replacing plugs and wires, along with the rest of the service recommendations that come along with that. Which is different than getting your car "tuned" on a dyno, which changes the computer programing for timing, fuel/O2 mix, and some other things (I'm not sure how they "tune" 70's carb monsters).
I'd look up a video for replacing spark plugs/wires in your vehicle to see if it's something you can do yourself. Some cars have the engine all covered up and sideways, so reaching into the back plugs is a pain in the ass, but if it's not, it should be like a 30 min job. I cant remember the brand of plugs/wires I last bought, but you should be able to find people talking about brands on any of the enthusiasts websites (like rennlist.com, corvetteforum.com, etc.).
Did you toss a bottle of fuel injector cleaner into the last tank of gas, by chance? If it was me, I would do plugs and wires first, with a bottle or two of injector cleaner (one per tank of gas). If you have been using premium octane, I would hope that the injectors are just mildly coated with carbon. I don't know how likely it is to get bad gas, but (afaik) if the cylinder is misfiring, it can lead to much higher carbon build up, setting up a bit of a feedback loop.
She did the injector bottle already yes and the car is run on premium. (Mazda's skyactive claim can use lower stuff at a HP hit but I didnt like the thought.)
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