just replaced my o2 with a denso

[caprisecca]

k so i just replaced my o2 sensor with a denso, and now my idle, if its in gear with the clutch in will tank to below 500 rpm's and start vibrating, and stops if i just drop into neutral. my car never had any idle issues before. y is it doing this anybody know?

[Bert]

On EFI cars there is a small rubber plug (about 1/2 inch in diameter) on the intake manifold slightly right of center. Pry it out and with a common screwdriver (while the car is running) you can adjust the idle enough to cure your problem. I'm guessing the new sensor is sending a slightly different message to the ECU than the previous one and this minor adjustment screw is just the ticket for addressing that.

[TominMO]

I can't directly answer your question, but I don't see this as a real problem. You shouldn't be putting the clutch in for more than a split second anyway, just to change gears.

I'm guessing there is some other factor we don't know about yet, because this symptom sounds strange for replacing the O2.

[caprisecca]

yeah i only noticed it because i thought the light was about to change so i put it in first to pull out and the light stayed red. then i felt the whole front end shaking and seen my rpms tank. when i finally parked i repeated the situation over and over and everytime the car went in first same thing then in neurtal rpms back to 600 or 700 or so.

[TominMO]

yeah i only noticed it because i thought the light was about to change so i put it in first to pull out and the light stayed red. then i felt the whole front end shaking and seen my rpms tank. when i finally parked i repeated the situation over and over and everytime the car went in first same thing then in neurtal rpms back to 600 or 700 or so.

Possibly the clutch or throwout bearing is dragging a little?

[koRnhead]

I would be looking for a small leak somewhere along the intake.

[Chobobulous]

k so i just replaced my o2 sensor with a denso, and now my idle, if its in gear with the clutch in will tank to below 500 rpm's and start vibrating, and stops if i just drop into neutral. my car never had any idle issues before. y is it doing this anybody know?

+1 mine is doing the same thing. When it revs, when it idles back down it drops to below 500 sounds like its about to die then it comes back up and levels off. Its pretty annoying.

[stonemaster]

mine does that only when weather conditions change, (wet) I read that a new O2 would SOLVE that not be the cause

[denguy]

I just ordered 2 densos because you guys said they were great.

[Movin]

More like now your computer is trying to work. Your old one may not have been
sending good info. The computer will sub its own values. Have you done anything
that would switch the clutch input info?? The programmed logic is to raise the idle
a couple hundred when the clutch is pushed in. Get that right then set the idle speed

[WmWatt]

Did you disconnect the battery to set the computer back to factory settings? It will then build up new settings based on your individual engine performance. If you didn't clear the settings, as pointed out it's probably using the settings that were built up with the old O2 sensor. It takes about 20 miles of driving to build up new settings. It may correct itself or maybe needs to be cleared. Might help. Can't hurt.

[Chobobulous]

Ok I tried this, as it revved up and came back down the engine cut out completely.... weird. It did this a couple of times and now it justs cuts down to almost dying and then levels off again

[FestYboy]

sounds like you need to clean your throttle body and make sure your dash pot is working (on passenger side of TB, the little diaphram and pushrod).

[caprisecca]

Have you done anything
that would switch the clutch input info??

nope havent done anything like that. i wouldnt even know how to do that lol. just changed the o2 and put in that k+n filter yall told me about... thats it

[caprisecca]

Did you disconnect the battery to set the computer back to factory settings?

i was told to do this after i replaced a iacv on a accord i had one time. it never seemed to help but i ended up getting rid of the car because i was unable to fix the idle problems, as well as my local mechanic... anyway i did think about it but did not yet do it, but i will straight away.