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Any Idea why my NGK plugs are black? I've replaced coil packs, plugs, cleaned injectors individually making sure they open and spray. I had a misfire code, now I have a 1312 code :( but it rough idles, its just not how it was :(
 

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Any Idea why my NGK plugs are black? I've replaced coil packs, plugs, cleaned injectors individually making sure they open and spray. I had a misfire code, now I have a 1312 code :( but it rough idles, its just not how it was :(
Hey can you message me back on here my Saab is having the same problem and I got the same code and same model and year and what did you do to fix your car
 
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