PLX wide band o2 gauge not the same as in tuner pro?

[Osmosis]

Ok, I just finshed my PLX wide band O2 installation. I am glad I'm done.

Now, I have yet to take her for a test run, been working a butt load of OT, home with the kids today so I really can't test her out for another 3 days I did take it out for a test run prior to connecting it to the ecm. The PLX gauge showed me aprox 11.3 AFR @ WOT, so I need to add some fuel as I'm running alky. I'm looking to be at apros 10.5 AFR @ WOT.

Now, I finally got her hooked up to the ecm. In tuner pro RT, I see my actual AFR @ 13.5- 13.6 at idle in tuner pro RT, yet my PLX gauge reads 14.5. When I turn my Ty off, tuner pro goes to 10.10 which is exaclty what tuner pro showed prior to the install of my PLX wide band, so I know tuner pro is seeing my wide band O2, I'm just puzzled as of why my reading in tuner pro is off from my PLX gauge.
Is this normal or is something wrong???? :roll: I hope not!

Thank you all for your help!:tup:

 

[skwayb]

Re: PLX wide band o2 gauge not the same as in tuner pro?

Sounds like you have the wrong sensor select in code59. Make sure that only the PLX sensor is selected. If more than one is selected it can cause that. If that isn't it, then you will want to check the wiring. You want the make sure the ECM and Wideband are grounded in the same spot. Otherwise you could get a ground difference and cause it be off.

If the wiring is correct, then you might need to add the capacitor between the ground and WB line as dscribed on the bottom of page 3, top of page 4 of the manual. You could be getting feedback causing it.

http://www.plxdevices.com/InstallationInstructions/SM-AFRUsersGuide.pdf

If you already have the CAP installed there then try removing it to see if the AFR is correct in TP.

That is where I would start.

 

[Osmosis]

Re: PLX wide band o2 gauge not the same as in tuner pro?

Thank you skwayb:tup:

I did not know there was different wbo2 sensors to choose from. I'll try that asap.

Thank you again!

 

[Osmosis]

Re: PLX wide band o2 gauge not the same as in tuner pro?

In tuner pro, how do I turn on the plx wide band o2?

Do I go in constants, flags and what do I actually need to do to turn my plx wide band on?

Thank you.

 

[Osmosis]

Re: PLX wide band o2 gauge not the same as in tuner pro?

I want to make sure my plx unit is properly set up.

I have my power coming from a fuse/piggyback adapter, black to ground for power for the plx box. I have my gauge connected to the TX as described on the website.

The analog plug.
Top Left has the wire from the PLX gauge.
Bottom Left has the black wire that goes to B9 on my ECM.
Bottom Right has the gray wire that goes to ecm F14.


Is everything ok here....or is something wrong?

Thank you all

 

[JSM]

Re: PLX wide band o2 gauge not the same as in tuner pro?

In tuner pro, how do I turn on the plx wide band o2?

Do I go in constants, flags and what do I actually need to do to turn my plx wide band on?

Thank you.

Flags, wideband selection is about 8 or so to pick from. Select PLX and make sure nothing else is selected so open all the others and make sure.

 

[Osmosis]

Re: PLX wide band o2 gauge not the same as in tuner pro?

Ok, first how do I select the plx? do I check the check box and save? If so, I did that.

Now, I"m a bit frustrated as the very little time I have had to play with my ty, I finally got a chance to go to the store. My wide band is now only reading 14.4 at wot:rant: Before I plugged it into my ecm, I got readings up to 11.3 at wot. After I got to the store, I unplugged it, ran it wot and still I could only get 14.4 @ wot????

Help please.

So far, I have tried to connect it back to the ecm, unplugging all electrical connections.

Any thoughts or ideas??

 

[Osmosis]

Re: PLX wide band o2 gauge not the same as in tuner pro?

First of all, sorry about all the posts. I'm out in the garage with a massive headache becasue I spend all day with the kids in and out of the pool/hottub and sun. Yea, beleive it or not, we actually get sun here in seattle area this time of year My wife is wondering what the hel! I"m doing working on my Ty in the garage...she's about....about read to start nagging, you know the look:lol: I've been working OT like a mad man and I have had little time the past few days to work on my ty. I'm trying to squeeze in as much as I can between work/family stuff. But after unplugging the sensors, it actually works. It seemed to fix everything. I checked the PLX box and made sure it was the only checked under the flags and everything seems to be working right as of now:tup:

 

[Osmosis]

Re: PLX wide band o2 gauge not the same as in tuner pro?

Ok, more problems:rant:

When driving my typhoon, I get an AFR of 10.10 in tuner pro, yet on my gauge it reads 12.2. So, in tuner pro, anything at WOT reads 10.10, what gives?

I went to the flag section and made sure all of the options were not checked and saved except for the option for the plx wide band o2. Something is not right. Can anyone help me solve this problem And to add to matters, my propshaft is leaking

 

[JSM]

Re: PLX wide band o2 gauge not the same as in tuner pro?

If it is stuck on 10 in tunerpro your signal wire is not hooked up and working it appears to me. Bad connection maybe.

 

[Osmosis]

Re: PLX wide band o2 gauge not the same as in tuner pro?

Which is the signal wire, gray wire from plx box to F14?

 

[JSM]

Re: PLX wide band o2 gauge not the same as in tuner pro?

yes, or the ground from plx isn't tied into truck ground/ecm ground.

 

[Osmosis]

Re: PLX wide band o2 gauge not the same as in tuner pro?

Thank you. I'll check that when I get home from work on .....Friday


And my propshaft leak

 

[Osmosis]

Re: PLX wide band o2 gauge not the same as in tuner pro?

OK, I try this tomorrow. Manditory OT:rant:

I think the ECM is seeing the wide band because I can see the readings on my laptop in tuner pro. The readings in tuner pro are off quite a bit.

Is there anything else I can do to get the readings in TP to equal my WBO2 gauge? I cut and pasted a part of a data run to see my actual afr vs rpm. you can see at the bottom where the AFR goes to 10.1. My WBO2 gauge is reading 11.3 when TP sees 10.1 afr.

What gives???

RPM Actual AFR Desired AFR O2 Voltage
RPM AFR AFR mV
1175 14.5 14.7 452.88
1175 14.5 14.7 452.88
1150 14.5 14.7 457.32
1125 14.9 14.7 452.88
1100 14.9 14.7 452.88
1100 14.9 14.7 452.88
1100 16.1 14.7 452.88
1050 17.5 14.7 457.32
1050 16.4 14.7 452.88
1025 15.4 14.7 452.88
975 14.5 14.7 448.44
950 15.2 14.7 452.88
925 16.9 14.7 452.88
925 18.4 14.7 452.88
900 19.1 14.7 452.88
900 20.6 14.7 457.32
900 20.6 14.7 452.88
900 20.6 14.7 452.88
900 18.8 14.7 452.88
900 18.8 14.7 452.88
925 17.2 14.7 457.32
1025 16.9 14.7 452.88
1100 15.6 14.7 452.88
1100 14.4 14.7 452.88
1100 15.8 14.7 452.88
1075 14.4 14.7 452.88
1075 13.8 14.7 452.88
1100 13.3 14.7 452.88
1100 13.5 14.7 452.88
1100 13.4 14.7 452.88
1100 13.2 14.7 448.44
1075 13.1 14.7 452.88
1100 12.9 14.7 452.88
1100 13.3 14.7 452.88
1150 20.6 14.7 452.88
1275 19.9 14.7 452.88
1375 18.4 14.7 452.88
1425 15.8 14.7 457.32
1425 17.5 14.7 452.88
1400 20.6 14.7 452.88
1450 20.6 14.7 452.88
1450 20.6 14.7 452.88
1575 20.6 14.7 452.88
1750 17.2 14.7 452.88
1825 14.1 14.7 457.32
1900 13.5 14.7 452.88
1875 14.9 14.7 452.88
1875 20.6 14.7 452.88
1975 18.8 14.7 457.32
2075 15.6 12.7 452.88
2225 12.2 12.6 452.88
2275 10.5 12.6 452.88
2275 11.8 12.6 457.32
2375 11.9 12.5 452.88
2375 12.3 12.5 452.88
2400 12.2 12.5 452.88
2475 11.6 12.5 457.32
2550 12.4 12.4 452.88
2550 12.8 12.4 452.88
2650 12.6 12.3 452.88
2675 12.3 12.3 452.88
2800 12.2 12.2 452.88
2875 11.7 12.2 452.88
2950 11.8 12.1 452.88
3025 11.8 12.1 452.88
3125 12 12 444
3150 11.6 12 452.88
3300 10.5 12 457.32
3425 10.3 12 452.88
3450 10.2 11.9 452.88
3525 10.1 11.9 457.32
3550 10.1 11.9 421.8
3650 10.1 11.9 457.32
3650 10.1 11.9 461.76
3775 10.1 11.9 457.32
3725 10.1 11.9 457.32
3700 10.1 11.9 457.32
3850 10.1 11.8 461.76
3850 10.1 11.8 457.32
3900 10.1 11.8 452.88
3600 10.1 11.9 448.44
3500 10.1 11.9 457.32
3450 10.1 11.9 461.76
3475 10.1 11.9 457.32
3400 10.1 11.9 452.88
3400 10.1 11.9 457.32
3450 10.1 11.9 421.8
3425 10.1 11.9 457.32
3550 10.1 11.9 452.88
3575 10.1 11.9 448.44
3650 10.1 11.9 448.44
3600 10.1 11.9 452.88
3675 10.1 11.9 448.44
3575 10.1 11.9 452.88
2675 10.1 14.7 448.44

 

[turbodig]

Re: PLX wide band o2 gauge not the same as in tuner pro?

OK, I try this tomorrow. Manditory OT:rant:

I think the ECM is seeing the wide band because I can see the readings on my laptop in tuner pro. The readings in tuner pro are off quite a bit.

Is there anything else I can do to get the readings in TP to equal my WBO2 gauge? I cut and pasted a part of a data run to see my actual afr vs rpm. you can see at the bottom where the AFR goes to 10.1. My WBO2 gauge is reading 11.3 when TP sees 10.1 afr.

What gives???

Like Jeff said, you still have another check-box checked for another wideband, either that or your PLX output is wrong.

Look through all the wide-band flags again.

 

[Osmosis]

Re: PLX wide band o2 gauge not the same as in tuner pro?

Thank you guys for all of the help!

I think I know what the problem is. I"m running tuner pro with no ostrich. I burn my chip, do a data run and tune my chip by looking at the aldl info and make the changes necessary.

Currently, my chip burn has the raw data box checked. I was checking the plx box while removing the raw data check box and expecting the plx to read correclty while reading the aldl port, but I need to re-burn my chip with the correct box checked. I"m gonna burn a chip and make the correct changes.

My results...well, I'm getting correct readings from my plx as I compare them to readings in tuner pro...YES!!! Kind of hard to eyeball both the gauge and my laptop at the same time, but it's right on!!!

Thanks for the help everyone!:tup:

 

[Aeroking]

Re: PLX wide band o2 gauge not the same as in tuner pro?

anyone else have this problem, and not get it resolved.

Mine has done this since i installed it new a couple years ago. Tunerpro always reads 0.5 afr leaner then the gauge. All the voltages check out, and grounds are good. I've just learned to live with it. I've heard a couple people have the same problem, and wondered if there was any resolution?

Thanks

 

[dgoodhue]

Re: PLX wide band o2 gauge not the same as in tuner pro?

I think my PLX reads just fine, if it read differently its less than .1. I have one of the older LED style box, so I don't know if that makes a difference.

 

[Osmosis]

Re: PLX wide band o2 gauge not the same as in tuner pro?

If I forgot to add in the post, I did not have my PLX wide band checked in TP. All is fine now:lol:

 

[Aeroking]

Re: PLX wide band o2 gauge not the same as in tuner pro?

Could it be that i'm pulling my power for the PLX box from a different source then where the ECM gets its power?