codes 33 and 34 on my KA

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MYK
Posts: 104
Joined: Tue Sep 28, 2004 3:06 pm
Car: 1995 240SX SE, 1997 GTI-VR6

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OKay the other day I failed emissions, I had falied on HC and CO numbers. just barely though. I printed some pages out of my FSM I have on the computer and I went out today and pulled codes. I got a 33 and a 34 code. I figured the 33 after doing some searching and whatnot on here about my emissions woes. checked wiring for continuity and it's good. did the O2 meter in mode 2 and the CEL stayed on for the most part. It turned off a couple times but not the 5 times on 10 seconds it's supposed to. So that's dead. Now the 34 code is for the knock sensor. I check continuity to the ECU and it's good from the connector. I checked continuity to ground coming off the knock sensor subharness and got nothing so I figure the knock sensor is bad. Now my question is this. If I go and change my O2 sensor (I can go pick on up at the local auto zone) will the bad knock sensor still cause my car to fail emissions? I'm probably going to have to order a knock sensor so it will be a few days before I get it and can install it. I only have 15 days to resmog my car before I eat that 39.50. Will replacing the O2 sensor get me back within spec to pass and then when I get the knock sensor get the rest of what ever driveability issues that causes back? I'm guessing the bad knock sensor is just cutting timing at higher rpms? or is it always cutting timing? I know at full throttle the car seems to fall on it's face, and does not pull to redline at all. thoughts?

myk


MYK
Posts: 104
Joined: Tue Sep 28, 2004 3:06 pm
Car: 1995 240SX SE, 1997 GTI-VR6

Post

damn what a difference an good O2 sensor will make. Installed a new bosch universal. I'm gonna order an OE one, just needed this one to get the car to pass emissions this week. After clearing the codes the knock sensor code didn't come back so I guess it's good. Car runs great right now. Not perfect but pretty good. I tried cleaning the pair thingy, the one that has the exhaust tube that injects air into the airbox. Not sure if that did anything. I'd like to completely get rid of that thing but for now she runs good. it was running a little funny, but I checked the timing and it was good. idle was just about right at around 750, not far off so I didn't mess with it. took it out and drove the hell out of it, gave it a little italian tune up pulls great now. and just putt putting along it runs great too now. I guess I burned off all the excess carbon and whatnot form it running so rich. Pegged the speedo a couple times


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