My check engine came on and code said misfire and open circuit on cylinder 1...got tune up with all new plugs and coil packs all around and replaced injector in cyclinder 1 but light is still on...mechanic that replaced injector said he had to run wire from positive ground to injector due to bad negative ground wire n suggests replacing my computer. ASAP ..is this necessary or should I get another opinion? Is it possible to just get new wiring harness?
My car has 127000 miles.
My car has an automatic transmission.
2005 Chrysler pacifica
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