Ok, so ive got this strange misfire going on at around 3700 rpm in every gear but 1 and 2. I bought the 325 about 3 months ago, and it ran fine when i bought it. The misfire is slowly getting worse but its not bad enough where a little lightness on the throttle wont get rid of it, but it does still happen at half throttle. I just did plugs because i had a broken one in cyl 1, so i replaced all of them and it ran amazing. I got headers with a used O2 sensor and the check engine light comes on every so often for it. Could just a simple bad O2 sensor create this somewhat violent and continuing misfire in high rpms? Or is that just adding to a bad fule pump, or dirty injectors or something else?
By the way i drove it with the 02 unplugged and it did it worse and in 2nd this time but same in other gears.
Any ideas?
By the way i drove it with the 02 unplugged and it did it worse and in 2nd this time but same in other gears.
Any ideas?
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