Hello all i am having a problem with my civic very intermittent does it cold or hot might do it right away other times i can drive miles once i start it and take off i can feel it start to stumble when it does i have no throttle the idle will drop down very low almost to a stall but never does then it will pick right back up and be normal i can drive just fine it has never done it 2 time in a full day of driving and might do it once a week might do it everyday just comes and goes i put in a new fuel pump with no change im gonna try relays next and iac valve i do get a little surge at times when at idle any ideas would be great thanks

 

Any codes?

 

Nope

 

I have an '03 LX and had a similar issue but with codes. I would be driving and just lose all power and acceleration. For me, it turned out to be the O2 sensors that were failing and eventually the cat converter clogging. I should note that the car has over 360k on the original motor. Not sure if this helps you but O2 sensors are cheap and easy to change. I do recommend using copper anti seize instead of what the manufacturer puts on there. It will help you greatly in the long run. Just don't over do it and accidentally get some down in the sensor like I did the first time. You'll end up having to get a second sensor.