Huge Problem please help...

Addicted2Boost · Post by **Addicted2Boost** » Sat May 31, 2008 10:55 pm

Yesterday my down pipe broke because the engine moved up and down to much when i shifted. I fixed that but now the car is running super lean at idle almost 18 then when i drive slow its running at a/f 16.8-17.9 vacuume is at -20 i tried to adjust and add more fuel but still nothing check engine light is still on even after i flashed the ecu. please help me

please excuse my grammar no sleep in two days

NiteHawk · Post by **NiteHawk** » Sun Jun 01, 2008 12:33 am

bad O2?

i dont know what to tell ya man, thats REALLY lean, like beyond dangerously lean....

if you're not getting enough fuel, the only other thing i can think of is to check the whole fuel system from tank to injector, just to make sure there's not another problem you didnt see already...

Addicted2Boost · Post by **Addicted2Boost** » Sun Jun 01, 2008 1:19 pm

P0132 O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)
P0139 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)
P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

Wenuden · Post by **Wenuden** » Sun Jun 01, 2008 2:04 pm

maybe you still have a huge exhaust leak? Slow response and no activity detexted leads me to believe that.

Addicted2Boost · Post by **Addicted2Boost** » Sun Jun 01, 2008 2:15 pm

update the wires to the 02 multed so i replaced the sections now its giving me this code only P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

blue demon02 · Post by **blue demon02** » Sun Jun 01, 2008 2:24 pm

TurboNeonEs wrote:update the wires to the 02 multed so i replaced the sections now its giving me this code only P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

You should have four wires coming of your o2 sensor. Two white one gray and one balck. If you get the two white ones swaped it will not read anything. I figured that out the hard way.

Nutmeg · Post by **Nutmeg** » Sun Jun 01, 2008 2:38 pm

Scary, don't blow up. Just get new sensors?

Addicted2Boost · Post by **Addicted2Boost** » Sun Jun 01, 2008 2:53 pm

i tried swapping the two wires still same code no activity dected maybe when all the wires melted together it shorted out the sensor?

Post by **occasional demons** » Sun Jun 01, 2008 4:11 pm

Bite it and replace the sensor. Did you get the exhaust leak fixed? if you have even the slightest leak it will screw with your PCM. Hopefully the melted wires didn't short and blow a circuit in the pcm.
Most likely the problem is the pipe comming apart pulled the O2 wires hard enough to damage the o2 internally. That happened on my Jeep to the downstream. I fixed the drooping exhaust and got the o2 replaced under warranty.

Addicted2Boost · Post by **Addicted2Boost** » Sun Jun 01, 2008 9:11 pm

replaced o2 sensor with a new one and now its running real lean and then it stalls the wideband is 18.0 fixed the exhaust leak

Addicted2Boost · Post by **Addicted2Boost** » Sun Jun 01, 2008 9:47 pm

can anyone tell me what the signal wire is on the o2 sensor either black white white or grey

NiteHawk · Post by **NiteHawk** » Sun Jun 01, 2008 10:10 pm

according to the FSM.....

Tan/White is the O2 signal, this would be the wire on the car's harness, not on the O2's harness...

Addicted2Boost · Post by **Addicted2Boost** » Sun Jun 01, 2008 10:13 pm

thank you im going to attempt to use the wideband o2 sensor by connecting the 0-5 aux output from the wideband to the input of the cars o2 sensor harness to see if this corrects any of my problems

can you tell me what color though on the 02 harness is signal i think its black not to sure though

Addicted2Boost · Post by **Addicted2Boost** » Sun Jun 01, 2008 10:45 pm

update car is running super lean 18.0 on the wideband at idle with all 4 o2 wires connected when i disconnected both white "heater" wires the car idles fine 14.7-15.1 how does this make anysense if the black wire is the signal wire and its connected

NiteHawk · Post by **NiteHawk** » Mon Jun 02, 2008 1:16 am

yikes, thats a no no man

wideband O2 sensors do not work on the same scale as narrowband O2 sensors

narrowband O2 sensors work on a 1v-2v range, wideband work on a 0-5v and phase variant or something range....your computer can not read a wideband.

Post by **occasional demons** » Mon Jun 02, 2008 9:50 am

IIRC the NGC uses a 0 - 5 volt scale? But you have '02 with the "Bell Cartach Fuel Management System" in your sig. I'm not familiar with it, so I can't really say what is controlling your A/F ratio.
Being non NGC, I'd say what Nitehawk said holds up. From the sounds of it you have a universal o2 replacement. I don't know why not having the heater circuit wired in would change the feedback, unless the o2 itself is wired wrong. I would get an NGK with the plug wired on it from the factory. Do you also have the downstream o2 wired in? They share the same ground. It could be the downstream is also damaged, throwing the upstream off.

Addicted2Boost · Post by **Addicted2Boost** » Mon Jun 02, 2008 10:02 am

yes down stream is wired in and the computer is not giving me any codes for that the bosch one that i got is universal and it says the black wire is signal and the stock one says signal is black do you think i fried the circuit in the computer i have asked many many people whats wrong no one knows i even am using a snap on odbi 2 and its not reading anything wrong
i wanted to get the ngk but all the local parts places were out of stock and didnt have any at other locations

Post by **occasional demons** » Mon Jun 02, 2008 11:45 am

Hook a digital volt-meter to the black output and see what voltage it's making. IIRC less than .5 is lean and more than .5 is rich, but I may have that backwards. Kind of a poorman's A/F meter. It should at least tell you if the o2 is putting something out. You may have to ground the meter to the gray wire to get an accurate reading. I haven't done this on a 4 wire so I can't say for sue if it's gonna work. Don't see why it won't.
Summit Racing has the NTK's instock, but then you are waiting for it to ship, plus paying $9.50 extra for handling.

Addicted2Boost · Post by **Addicted2Boost** » Mon Jun 02, 2008 2:51 pm

with 02 connected its giving me this code P1193 EGR Drive Overcurrent

Addicted2Boost · Post by **Addicted2Boost** » Tue Jun 03, 2008 7:21 pm

went to the local car shop and they said that the 02 sensor heater is at 100% all all the time and thats not what its supposed to do