[n_hall]

a couple weeks ago i repaired my afm and replaced my fuel pressure regulator, and zip tied all vacuum connections. my car ran better than it ever has in my ownership of it. before that it would sound like it's running on 3 cylinders, but noid light and spark plug light testing showed that all four were getting fuel and spark.

fast forward a couple weeks and it started to sputter anywhere between 2k and 4k. and it also switches to the 3 cylinder running normally when i try to accelerate a little faster than a soccer mom in a minivan. it will do that until i let off the gas, it will then run normally but probably sputter.

it's starting to get on my nerves every time i drive it. i was trying random things trying to fix it. today i replaced my afm with a used one on ebay, but it's running the same. i tried running it with the o2 sensor unplugged and it runs the same as with it connected. could it be the o2 sensor? anyone have any ideas?

thank you,
nick