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If the engine run with a computer......
Before we took the engine out of the wife '89gt to put in my fastback, we did the paperclip shunt and counting the blimps on the MIL light. That was a pain in the butt to count the short vs. long flashes and long and short pauses. Best 20 bucks I spent was to get a ford reader that has a digital display. Plus it will do some diagnostics to see if there's a weak cylinder."daveSanborn" said:My '66 runs on an A9L EEC. When I made the conversion I wired in the check engine light. The check engine light can be used to pull the codes from the computer.
Would it be nice to have a code reader? Yes, but it's not 100% necessary.