did you mix/match wiring harness from different model years?
2002 mustang gt motor swap, speedo, high idle
just swapped a npi shortblock npi head set up in my 2002 gt, had a high idle, noticed the speedo was going crazy, unplugged the trans harness. high idle went away, speedo still going crazy, what is going on here. O2 sensors were pegged unplugged those along with trans harness, pass side o2 is still showing pegged without being hooked up. whats going on here?
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its your air charge temp sensor, just pull it out and spray it with carb cleaner
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