Car runs rough from 1.6k - 2k RPM

[bchaney]

My accord just started doing this - wondering if anyone has had similar trouble. The acceleration isn't as smooth as it once was from 1.6k to 2k RPM. It slightly vibrates and just generally seems like it's struggling to accelerate. It doesn't sound as smooth either, kinda like it's sputtering. I mainly notice it in 1st gear but it does it in 4th too (and all other gears I'm assuming).

Anyone have any ideas?

[bchaney]

Can anyone help me out?

I've been doing some research but haven't come up with anything promising. Maybe a misfire? But I'm not throwing a CEL. I changed plugs 3k miles ago. Maybe coils?

I'm confused because it's happening only at specific rpm and I'm not getting a CEL.

[visualpoet]

Tune up.

[NWaccord]

I had the exact same problem, Ended up being the o2 sensor. NGK work the best.

[DJ metadelic]

If you're having minor ignition misfires in your cylinder, the culprit is most likely a fouled plug. Have you tried doing a once-over tune up? Go ahead and replace the fuel filter--easy as pie, just a few bolts and a banjo bolt, make sure to relieve tank pressure first. Also, replace plugs, check your rotor in your dizzy cap, an o2 sensor could be it, I think it just needs a minor tune-up. Give us a shout back once you've taken the proper steps to ensure these type of things are in check.

[deevergote]

My car is doing the same. I changed my fuel map to a richer one (not something you can do yet...) and it fixed the problem, so it's very likely that the o2 sensor is the problem.

Replace your o2 sensor with NTK or DENSO. DO NOT get a Bosch sensor. They're considerably cheaper, but they do not work properly... it'll be a waste of $65. NTK or Denso ONLY.

Replacing your spark plugs, wires, cap, rotor, fuel filter, and ensuring that all electrical connections and grounds are tight and clean will also help a great deal.