different o2 sensor question :)

Mustangless · Jul 22, 2004

I searched a lot of previous posts and didnt really find an exact answer....i recently got LT's and an o/r h-pipe..flowmaster 40's...emissions isnt an issue to me...my o2 sensors that were plugged into my stock h-pipe arent long enough to reach my header collector....do i need these?? will it affect performance??..i read and heard it can play with the fuel/air ratio and mess up idling..so if i do need them can i just splice in longer wire...because it would be a lot cheaper than order extension for like 40 bucks.

Oh yea..and the sig isnt my car..its my friends

Any comments or suggestions would be appreciated,

Mark

HISSIN50 · Jul 23, 2004

i would cough up the $$. even the best solder job (no crimp connectors!) will create resistance. remember the lambdas only range from ~0.1 to 1.0 volt. just my thinking.

HISSIN50 · Jul 23, 2004

oh yeah, the o2's trim fuel once in closed loop. i would not run w/o them. your milage will suffer and you will run around in semi-limp mode.

mo_dingo · Jul 23, 2004

Yeah, it's really crazy how the O2's work on our cars. The computer actually forces an oscillating rich/lean condition.

I don't know what will happen when you punch the throttle. I assume the computer will ingore the O2's like normal and will only read from the MAF/IAT/ECT. But you also may activate the KAM tables & run like crap.

So once the car's warmed up, your CEL will come on, and you will run very inefficiently during normal cruise.

Wouldn't using the O2 extenders create more resistance versus soldering the wires together. I mean the solder conducts electricity very well. It's the closest you can get to actually "welding" the wires together. If I am wrong please school me!

Scott

squall9393 · Jul 23, 2004

True that solder is an excellent conductor or else it wouldn't be used in the electronic industry but consider the wire size rather than the length. I don't think a few more inches of wire is gonna produce any resistance that could be significant enough to through the CEL or screw with the computer. Solder joints hower have to to be clean for them to do more harm than good. If you got just a blob of solder to keep the connection holding and it's fat, dirty, and sloppy then you made a joint that is bigger and with more resistance than the initial wire gauge. That in turn could possibly be an attenuation point on the line. However, I would still think wouldn't be enough to screw any signals up to the computer. There's my 2 pennies on that one from a technicians viewpoint. Sorry so long.

Jarrod

different o2 sensor question :)

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