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code p1504

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  1. Gen 2 Lightnings
    Hello guys and gals, i keep having issues with my iac valve after i did the m122 it throws code p1504, ive replaced the iac multiple times, it works good for about a month at most then goes out, all the iac valves i use are motocraft not a cheap brand issue , its not a wiring issue the wires are...
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