KA24DE mood swings runs right when it wants toooo

[amyasin]

I have 1991 s13 with the stock KA

After driving it for sometime the car started running rough, idling was fine and no check engine light.So I figured it was time for a tuneup and replaced the following

- Valve cover gasket- Oil Change- Spark Plugs- 8.5mm wires- rotor - cap

After doing all that work it will run really rough, and then it will run damn near perfect

I was thinking that it might be the fuel filter or EGR valve but isnt there a check engine light that comes along as an indicator?

Thanks for your help in advance

Adam

[psi240]

if ur getting bad gas mileage its prolly ur o2 sensor .. it causes to car to run like ****.

[amyasin]

but wouldnt the check engine light come on if its the o2 sensor?

[psi240]

the o2 sensor went on my 240 .. and i didnt get a check engine light .. so i dunno.

[poems2beats]

the o2 sensor went on my 240 .. and i didnt get a check engine light .. so i dunno.

Sorry bout the thread jack..... But Im trying to replace my o2 sensor and for some reason the o2 sensors from autozone/kragen are not the right size(to small). I bought both the OEM and universals, they were the same size. The o2 I pullled from my header was hella bigger.... Wer did u get yours?

[-RJ-]

i had that same problem, its bigger becuase there is a bolt on the o2 sensor. its an adaptor of some kind

i ran around for 3 days to every parts store trying to figure that out

[poems2beats]

i had that same problem, its bigger becuase there is a bolt on the o2 sensor. its an adaptor of some kind

i ran around for 3 days to every parts store trying to figure that out

OK so do i remove the adaptor on the old one and put it on the new 02 sensor?