ECMlink o2 not cycling?

[talonsteve25]

I finally got the link and was messing around with it the other day, i was going to start tuning my girl but i found that my front o2 isn't cycling like it should? I'm pretty nooby right now so i know i didn't log all that i should have but hopefully what i do have could point me in the right direction.

 

[LiquidX]

I cannot view the log on my phone but try clicking on the box to simulate the idle switch and see if that changes anything.

 

[LTUDSM]

I finally got the link and was messing around with it the other day, i was going to start tuning my girl but i found that my front o2 isn't cycling like it should? I'm pretty nooby right now so i know i didn't log all that i should have but hopefully what i do have could point me in the right direction.

Make sure you log
MafRaw
MafComp
CombinedFt


Now two questions:
What size injectors youre using? do you have a wideband 02?

 

[68442]

Log shows 950cc injectors. Idle is all over the place as is the timing, airflowper rev is high too. I'm pretty new at link too, so I'd post this up at the ecmlink forums. You need to log your fuel trims also.

 

[LTUDSM]

Log shows 950cc injectors. Idle is all over the place as is the timing, airflowper rev is high too. I'm pretty new at link too, so I'd post this up at the ecmlink forums. You need to log your fuel trims also.

I know it shows 950. but if you look at this fella's profile ,you will see,that he has 850's,that are pending alond with 255 wallyfuel pump. Thats why i asked....

 

[snowborder714]

If it's not cycling, which it isn't, then it needs replaced.

 

[UofACATS]

Can you post another, short idle log with the car up to normal operating temperature, adding CombinedFT?

Do you have a wideband?

 

[LiquidX]

Idle switch is working, your o2 is shot as Brian said. You'll need a new one. I'd say get yourself an Innovate LC-1 wideband, log it through Link and use narrow band simulation. You'll want a wideband anyway for tuning and it will eliminate another sensor that won't be needed.

Just run the wideband in the front o2 sensor location and there is no need for a heat shield nor is there any adverse affects.

 

[beihl304]

i thought with the lc1 you would want a heat shield if it is front o2? I am not trying to jack this thread but maybe i was told wrong? If so im definitely putting mine up front.

Either your o2 needs replaced or your car is running in open loop.

edit:: just looked at log and it is in closed loop so that is not the case.

 

[LiquidX]

i thought with the lc1 you would want a heat shield if it is front o2? I am not trying to jack this thread but maybe i was told wrong? If so im definitely putting mine up front.

Either your o2 needs replaced or your car is running in open loop.

edit:: just looked at log and it is in closed loop so that is not the case.

No heat shields are required at all. Wideband sensors come stock on a decent amount of new vehicles.

It's really just a myth that the sensor needs to be 36" down stream or have a heat shield. Yes Innovate states those facts as well but there have been no known cases on the forum or others dealing with heat issues.

I personally run mine in the front o2 without a heat shield and so does Tom (from ECMLink), and so do many other members.


The LC-1 can run narrow band simulation without the use of Link as well so anyone with an LC-1 can benefit from it and loose the narrow band sensor.

I will say though that narrow band simulation isn't as "accurate" as a true narrow band sensor that is detecting the changes in the mixture where as NBS is just switching at certain points to allow proper function of closed loop.

 

[talonsteve25]

ok so i can use the LC-1 sensor and totally replace the stock one by putting it in the front location and pinning the brown wire to the ecu to what ever pin its suppost to be on? Thats good because iv already have the wideband i just havent hooked it up through the link i just have it in the rear o2 location.

 

[snowborder714]

Yes, you can replace the front o2 with the wideband. Pin 76 is the front o2 input for a 2g.

 

[LiquidX]

Just follow the directions as you have. Since you have Link, you don't need to use the other wire to wire in NBS rather you let ECMLink v3 do it internally. You can keep the sensor wired into the rear o2 at the ECU, just swap it to the front location in the exhaust if that's what you are referring to.

Closer to the engine will give a faster response time as well as decrease the potential locations for an exhaust leak to occur which will give false read outs.

 

[beihl304]

No heat shields are required at all. Wideband sensors come stock on a decent amount of new vehicles.

It's really just a myth that the sensor needs to be 36" down stream or have a heat shield. Yes Innovate states those facts as well but there have been no known cases on the forum or others dealing with heat issues.

I personally run mine in the front o2 without a heat shield and so does Tom (from ECMLink), and so do many other members.


The LC-1 can run narrow band simulation without the use of Link as well so anyone with an LC-1 can benefit from it and loose the narrow band sensor.

I will say though that narrow band simulation isn't as "accurate" as a true narrow band sensor that is detecting the changes in the mixture where as NBS is just switching at certain points to allow proper function of closed loop.

sweet! thanks for clearing that up

 

[talonsteve25]

Ok ill get an idle log as soon as i get all of that done and it warms up, and ill up date my profile so theres no confusion, thanks guys.

 

[talonsteve25]

So iv finally got a chance to work on it again and i found out that my Lc-1 unit wire to o2 sensor, is not very long, only about a foot? If i did put the Lc-1 o2 sensor in the front o2 position the actual Lc-1 unit would be under the hood. How did you guys get yours to fit?

 

[snowborder714]

My LC-1 box is zip tied on to something down on the front subframe. You may have to lengthen the wires that go in the cabin.

 

[talonsteve25]

Its ok if it gets wet?

 

[snowborder714]

Mine's been there for a while and haven't had any issues.

 

[talonsteve25]

Thanks bud! Im gonna go get it all hooked up asap then.