FWIW, ive been running extended O2 wires on my car for over 3 years now with no problems. Maybe im just lucky.

 

What was said, is that you can extend the harness but not the O2 wiring. An O2 extension that you will purchase will effectively extend the harness, it in no way affects the center of the O2 wire, obviously

 

Either you can try cutting out your home-made extention and solder them back together, or simply buy new ones, they aren't that expensive at about $35 USD a pop.

 

Thanks again DR. Where can you get those? I just purchased LT1 Edit Professional, so now the fun begins, I may just tune for open loop.

 

I ran open loop, a small benefit is you can lean it out a bit more if you watch the timing, but I would try to just shoot for closed loop unless your looking at a big nasty cam. Even with a 306 a fair number of folks run open loop to 1200 RPM, but not thereafter, this helps fix up the idle since alot of overlap (causing reversion side to side) ends up throwing the O2 sensors out of whack and it just gets worse.

Pretty much any place selling LT1 goodies should have extendors, TByrne, Thunderracing, etc probably at least 2/3 "LT1" places should have em since alot of LT users need them, even for SLP shorties I needed one, although that was because I had a bung in my left side header not in the Y pipe like stock.

 

Hmm...new O2s for ~$35 a pop, or O2 wire harnesses (extended) for $25 each?

I'm all about cutting costs and I represent the hardcore DIYer, but some things need to be done right. IMO, this is one of them. Heck, after spending so much coin on headers/gaskets/y-pipe/bolts, what is $50 in the grand scheme of things?

Ryan

 

That's the great thing about el es juan's. Reuse the stock gasket and bolts.

 

I had the same problem with my O2s. When I got my hookers I just lengthed the O2 wires and my car ran like crap. I had to buy new sensors and the extensions. The extensions are worth paying for.

Then the headers burnt through the wireing harness that go to the right O2. I extended those wires about 6 inches and now the right O2 is reading 0.000.

 

I have been running an extension on one o2 sensor, for like 2 years. I now am pulling the moter apart because it is shot. The side that is shot, is the side that had the o2 extendor. Could this of been the problem? I guess it is time for me to get new o2's and buy extenders, because I am going to put long tubes on when I build my 383.

 

Hmm...that couls explain another factor to my car running like crap, even without a tune just yet..

 

If they're like older O2 sensors, the wire is stainless, and fairly difficult to solder. I've extedned older, single wire O2 sensors with similar stainless and it worked fine (not sure that it should have though).

 

Rooster, I am 99% sure that we can lengthen our single wire O2s. Its just the 4 wire ones that need to be lengthened before the 02 connection.

 

I have been following this thread and trying to understand the logic behind all of this. I am not saying that what is being stated is wrong, i'm just questioning for my own knowledge. What is the main difference of buying the o2 extention and adding 12" of wire to the harness, and splicing in 6" of good copper wire into the o2 sensor? Some have said about oxygen readings in the harness up until the connector. But either way, your adding extra resistence. I myself did my own extension and noticed that my o2's were higher than they were before the headers, but i attributed that to the headers. A friend of mine also did his own extension and did not see a change in o2 readings. Please help.

 

Personally, I dont believe the whole 'O2 sensor reads the amount of oxygen in the wiring.' That sounds waaay too technical for a stupid o2 sensor on a car. Id have to hear a really good explaination on this to make me believe it.

Like Ive said, ive been running extended o2 wires on my car for over 3 years with no problems at all ( well execpt for the time i was experimenting with leaded race fuel but thats a different story).

Now you can use too thick of a gauge, too long, or just have a bad splice connection and get skewed readings. Or maybe accidentally cross two of the wires during splicing and cause it to not work at all. But if you take your time, make sure you have good connections and its well insulated you should have no problems from extending your o2 wires.

with that said....I welcome the flames

 

I foudn that the 93 o2 sensors (single wire) aren't at all affected by cutting them & extending them aslong as you use good quality wire, but the heated ones go all crazy.