Hey guys, I need some help for my stepdad. His 90 accord is acting weird. Just a week ago we changed the spark plugs, ran fine for the last week or so, now its bogging in low rpm's. Im thinking O2 sensor. No CEL, but im thinking its just on its way to death, and we all know that damn O2 sensor doesnt throw a CEL til after its dead. Any other ideas that cause hesitation/bogging in low rpms? thx

 

What kind of plugs did you put in it? I bet they arent NGK