Running to rich posted by GCamp on July 28, 2013 at 08:13 PM
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don't run anything more. When did the problem start? If it started when you put in the new harness, I'd make sure the wires are on the right injectors. If you put in new injectors (not sure from your wording), I'd make sure the O rings are not leaking. (doesn't sound like it, because it idles good). If it started when you put in the upgraded ecu, I'd make sure it's for the size injectors in your car. Have you done anything else to the car lately?