I apologize for the noob question. I tried searching both here and on the interwebs but kept coming up with PLX's data logging software and a bunch of threads on "Which AFR meter should I buy."

Anyways, I bought a PLX M-300TE awhile back and am now going to attempt to tune my fuel maps. I was originally planning on just using the LCD but since I'm going to be street tuning I'd much rather have it log on my computer while I drive and then I can check it later.

Is this possible with the this AFR meter?

 

Another (maybe dumb) question: Can I hook it up to my cigarette lighter? If not, I can wire it into the +'ve and -'ve wires for my oil pressure gauge.

 

It has an output you can hook up to the ECU.

If it doesn't have a cigarette lighter adapter, just get one with wire leads and connect it to the PLX + and -. You'll likely have to use an offset in the software to get it to read properly using this method.

 

I'm definitely new to this ECU stuff. I'd like to keep the narrowband O2 sensor since I'm only using the wideband to tune and then taking it back off in a few weeks.

I know there is a gray cable I can use to output the signal from the WB to the ECU. I hooked the one end up to the WB and now I'm not sure where the other end goes. Also, do I need to hook another cable up to the ground?

Sorry, this is my first time attempting something like this.

 

Also, I was reading some stuff and it says I need to cut out the resistor J12 on my ECU. I'm not sure why this is and I'm kind of hesitant to start hacking around in my ECU before I know why.

 

J12 is for full duplex datalogging.

You can refer to the owners manual for the details on the wiring.

 

What owners manual are you referring to?

I'm using a P06 ECU with what I believe is an OBD2a -> OBD1 conversion harness. The M-300 manual just shows a box representing the AFR connecting to another box that is "Your Application" which doesn't really help me much. I saw a thread where they talked about somehow wiring it into the ELD?

 

Yes, your engine management should have the available pins listed in the software... and if you need the stock ECU pinout simply search google for Honda OBD1 ECU Pinout.

 

Oh snap, I was trying to find that but didn't know what to search for.

So looking at this there are a few empty pins (A10, A14, D8, etc). Just find one that is supported by Crome's datalogging and plug it in? (I know it's a little more complicated but that's the general idea, right?)

 

Oh, you're using Crome. Sorry, you only have the O2 input available. Think about upgrading to something better if you want that functionality.

 

Can I disable the stock O2 sensor while I'm tuning and replace that pin with my wideband and then enable it again once I'm done and hook it back up?

 

If you want.

 

Is this pretty much the only method? Could another program like Freelog do this?

 

Yes.

Sorry, I've never used freelog, but the Crome protocol doesn't support ELD, so unless freelog is retrieving the information using a direct memory command ELD will not be available. Good luck!

 

Ok, thanks for the help.

If anyone stumbles across this thread in the future, I'm getting help with Crome over here: http://forum.pgmfi.org/viewtopic.php?f=29&t=19580

 

PLX widebans have Narrowband outputs aswell. if you look at the 4 pin connector you will have an analog ground, WB output, & NB output. SO you can get rid of your stock 02 sensor and use the PLX. Only thing is you bought the TE so will you be removing this to tune other people car with?

With Crome and Freelog like stated above you can only use the 02 input on the ecu (D14). in my case when i would hook up my 300TE or my DM5 widebands i wouldnt get a correct reading because thats a 3.83v source not a 5v. there was a trick on PGMFI that you could make that into a 5v input.

If you get a better software you can use the ELD, or EGR pins for better Data loging. some Software even have serial option available.

 

Yeah it's only going to be in there temporarily. Do you remember what I need to do to get it to work right?

Also in Crome I want to disable the O2 sensor heater but not disable the O2 sensor itself, right?

 

No, you need to disable the O2 heater and closed loop.

 

Wait, disable both the O2 heater and the O2 sensor itself? (Run closed loop?)

 

Disabling closed loop means you run open loop, which you always should during the tuning process.

 

In Crome it says "Disable oxygen sensor (closed loop)" Does that mean I'm disabling the oxygen sensor AND disabling closed loop operation or does it mean I'm disabling the oxygen sensor AND AS A RESULT running in closed loop operation?

 

I imagine that means disabling closed loop. You'll still need to disable O2 Heater as well. I would hope it has separate options for the two, but it is Crome.

 

So I actually misread it at first. This is what is in Crome:

 

That should work fine.

 

When tuning you must tune in Open loop. So yes you turn off the 02 sensor (closed loop) and heater. Tune the car and when done Turn on the 02 sensor. you can leave the heater off if its a non heated 02 sensor. ill have to do some digging around in the mean time search on PGMFI for it awell on the input for crome.

Your also gonna need to hook the analog ground to the ecu. you can get on PLX website and look at there tech section for where they recomend installing their widebands to honda ecm's. if your trying to tune other peoples cars you might wanna invest in a tuner jumper harness. Xenocron sells them as well as maybe a few others.