Recap for those that do not want to read the whole thread. Legend (trust me you will need it) p1148=closed loop bank 1, p1031=A/F Ratio sensor meter, p1283=A/F ratio lean bank 2, p1284=A/F ratio rich bank 2.
12/22 Prototype headers installed. The front A/F sensors were on the middle header pipe, and the rears were relocated after the cat. As soon as I started it up I got 3 codes: p1148, p1148 and p1031. After the pedal ECU reflash 3 days later I got 5 codes p1148, p1148, p1031, p1283 and p1031.
Went back to Hotshot they found loose wiring for one of the rears and fixed that. They also relocated the front 02 sensors to the downpipe after the collectors. No codes at start up. about 1-2 days later I got p1284.
I have been resetting this code since the fix, and last night I got 1284, 1148, 1148, and 1031.
Right now I agree with Velicos I think my bank2 front sensor is messed up, and within the last couple of says the wiring for the right (rear header) rear is now loose again. Pictures are being uploaded later today.
I know have the LM-1 and before I install it I am going to use it to verify A/F mixture on the header pipe bund and the downpipe bung for bank 2 (front of the engine, right?).
altiazul. you should leave the sensor wherever they come stock. the bottom sensor just place it before the cat or before the resonator. remember that whatever u do, you must let the ecu manage the closed loop operation.
and believe me bigox. he is doing a painfull task being a test car. but at the end will be more than worth it. i believe the 05's have an advantage with the wideband so the ecu will readjust on closed loop. meaning great mpg and launch out the line.
Bank 2 is the back of the engine...I think. And if noone has said it yet...thanks for going through all this so us 05's could get some headers.
Bank 1 is the is the rear near firewall, and bank 2 is the front near radiator.
I am starting to regret it. Ifeel I should have waited and got the finished product, but if I did not do it there might not be a finished product from hotshot lol.
I'm getting confused on how your O2 sensor wiring is "becoming loose"....
If they aren't soldering your O2 extensions they should be shot!
The rears were originally crimped. One of them was found to be loose and soldered, the other was left crimped.
The fronts were originally factory wiring, and when he extended them he soldered those. These are 5 wire sensors so he had to add a wire to and existing extension kit.
altiazul. you should leave the sensor wherever they come stock. the bottom sensor just place it before the cat or before the resonator. remember that whatever u do, you must let the ecu manage the closed loop operation.
In stock form they come at the collector for the rear header and after the collector in the front header. To acheive this on the Hotshots they had to be moved.
I am starting to regret it. Ifeel I should have waited and got the finished product, but if I did not do it there might not be a finished product from hotshot
-Doug
We're aware of your efforts and they're appreciated. I'm going to name my headers after you...or at least my first code!
Bought a bosch 5 wire universal sensor on eBay ($58 shipped), just in case. I hope that the "cold fusion" thingy can be used for soldering these wires.
Quote:
Originally Posted by theAltimaDrivingMachine
We're aware of your efforts and they're appreciated. I'm going to name my headers after you...or at least my first code!
Lol, I was just having a momentary lapse, I don't always whine like a litte biach.
Are you 100% positive the universals are the same O2 sensors that Nissan uses? Wideband sensors throw out different voltages which the ECU is pre-set to read, if it's a different signal you may make the situation even worse.....
I think your chasing your tail in circles.. I would of left the sensors in there original location where HS put them. Moving the upper sensors down alittle don't see how that would make any difference. Your not the first one to throw SES lights after a header install. I think your trying to fix something that would worked itself out is my opinion.
Are you 100% positive the universals are the same O2 sensors that Nissan uses? Wideband sensors throw out different voltages which the ECU is pre-set to read, if it's a different signal you may make the situation even worse.....
OE for our sensors are honestly the way to go...
Nissan uses the Bosch 5 wire sensors. I bought Bosch 5 wires, but am not 100% sure they are the correct ones.
Quote:
Originally Posted by altimateone
I think your chasing your tail in circles.. I would of left the sensors in there original location where HS put them. Moving the upper sensors down alittle don't see how that would make any difference. Your not the first one to throw SES lights after a header install. I think your trying to fix something that would worked itself out is my opinion.
HS moved them not me. The difference (as explained to me by HS) is that in the original location on the pipe the o2 sensor might have been reading lean because of the gases being hotter, and now its running rich because in the new location the gases have had a chance to cool.
2-3 other 05's have had issues with headers (SS) but none have posted if the resoved them. Only 2 members that I know of got 1283, 1284, 1273 and/or 1274 and bumbed their threads but no dice.
You might be right unless HS damaged my o2 sensor.
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