Logging wideband with no EIO?
We just did some testing with the EIO and had to subtract .38 from the formula to get the A/F to be the same thing as the wideband. Logworks said 11.00 when HPT recorded 11.38.
Originally Posted by ninobrn99
sounds like its an issue with tuners...phil, i know you've been having this issue your yours for some time too. Is HPT just off .3 all the time or until your fix the calculation?
Phil
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Joined: Aug 2003
Posts: 970
Likes: 4
From: England UK
Originally Posted by ninobrn99
but where? I think HPT becasue its happening with the lc1's and now this guys AEM. similar instances 
HP Tuners is only reading the voltages the PCM had converted to digital. I dont beleive HP Tuners is at fault with this, as if it added .3V to any sensor we would be way out on many things.
If its a constant .3V off then we can adjust, its no problem at all. Just glad to be able to log wideband without having to buy the EIO interface as I would be without logging for 4 weeks (sending from the UK and waiting for it to come back)
Originally Posted by ninobrn99
sounds like its an issue with tuners...phil, i know you've been having this issue your yours for some time too. Is HPT just off .3 all the time or until your fix the calculation?
i'm getting 4.88v@free air at analog out of LC1, HPT shows 4.88v also...had to do custom PID to acount for voltage loss..didnt do the ground offset check but i should be ok, i think
Originally Posted by Jpr5690
So How Can I Accomplish This With A 2002 Car?
im not positive this'll work, but its easy enough to test:
unplug your PCM connection.. pop the cap off of one of the connectors. the pins will now pull out easily.. cut a wire you wont ever need again (AIR, rear O2,ect...) then pull it thru.
now stick your newly freed pin into the EGR position.. click the connector cap back on (when i say connector cap, i mean the red or the blue translucent covers) and plug it into the PCM..
now flash up a HPtuners bin with the EGR enabled....but everything zeroed out in the tables.. car should run the same, but now its looking at the EGR..
now hookup the scanner and just put 5v to that wire, and see if you can see it.
sounds like alot of work, but it only takes 5min to test out.
if that doesnt work, theres always the AC pressure one.... if you got metripack connectors, you might be able to swap between having AC and logging wideband, without cutting anything....
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Joined: Nov 2001
Posts: 7,036
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From: Lake Zurich, IL
Originally Posted by RedWS6 00
Well got some good news. Got my wideband wired up to the laptop and viewed in HP Tuners with no EIO Using a wire which used to go the the EGR valve.
Parts used:-
AEM Wideband guage was this wire with bosch sensor (http://www.thunderracing.com/catalog...&vid=3&pcid=62)
Length of wire
2 x crimps
Time to install about 15mins.
The output from thre AEM guage is 0-5V. This is the white wire.
The EGR valve had been removed some time back. The connector has been cut off to tidy up the wiring loom. The wire you want is the brown wire, this reports back 0-5V to the PCM. I tested it was this wire by using a resistor to 5V and verified this on this using HP Tuners.
The wire from the AEM guage was extented to reach the EGR Brown wire using a bit of wire and two crimps. Now the output from the AEM guage will be routed to the PCM, if you monitor the EGR reading in the PCM you will see it changed with AFR.
Now you need to create a custom PID.
In HP Tuners
For the AEM guage the formula would be
=(EGR_Volts/0.5)+10
Other guages may need a different formula, this should be documented in your wide band guage leaflet of what voltage euqals what AFR.
Turned on ignition and the AEM guage read 14.7:1, but HP Tuners read 15.1:1, now this isn't a problem, we can just adjust the formula. Probably just down to reference voltages and volt drops down wires.
As the EGR valve was removed some months back all EGR references in the PCM have been disabled. Once you have done this Wideband/EGR mod you will need to go to Engine/General/EGR Enabled = Enabled, if this is disabled then the EGR voltage wont be read into the PCM, this needs to be enabled.
Check that Spark Control/Spark Advance/EGR Spark Advance is all zeroed out.
Using a wire which used to go the the EGR valve.Parts used:-
AEM Wideband guage was this wire with bosch sensor (http://www.thunderracing.com/catalog...&vid=3&pcid=62)
Length of wire
2 x crimps
Time to install about 15mins.
The output from thre AEM guage is 0-5V. This is the white wire.
The EGR valve had been removed some time back. The connector has been cut off to tidy up the wiring loom. The wire you want is the brown wire, this reports back 0-5V to the PCM. I tested it was this wire by using a resistor to 5V and verified this on this using HP Tuners.
The wire from the AEM guage was extented to reach the EGR Brown wire using a bit of wire and two crimps. Now the output from the AEM guage will be routed to the PCM, if you monitor the EGR reading in the PCM you will see it changed with AFR.
Now you need to create a custom PID.
In HP Tuners
For the AEM guage the formula would be
=(EGR_Volts/0.5)+10
Other guages may need a different formula, this should be documented in your wide band guage leaflet of what voltage euqals what AFR.
Turned on ignition and the AEM guage read 14.7:1, but HP Tuners read 15.1:1, now this isn't a problem, we can just adjust the formula. Probably just down to reference voltages and volt drops down wires.
As the EGR valve was removed some months back all EGR references in the PCM have been disabled. Once you have done this Wideband/EGR mod you will need to go to Engine/General/EGR Enabled = Enabled, if this is disabled then the EGR voltage wont be read into the PCM, this needs to be enabled.
Check that Spark Control/Spark Advance/EGR Spark Advance is all zeroed out.
Excellent info... adding to stickies
(01/02 guys , I believe this will still apply to you, just just need to add a wire to the PCM for the EGR signal.)
Originally Posted by Jpr5690
Which Pin Would Be Egr On A 2002 Car?
http://www.ls2.com/boggs/torques/99pinpcm.htm
you should see it on there... blue #55 i believe.
when you have the PCM connectors in your hand, its alot easier to see what i mean.
anyhoo, i was playing with this stuff at work today.. i made my own custom PID for the AFR... and then i made one for the AFR % error...
of course i donno if it works or not yet... since i need a wideband, but im ready for when it gets here...
maybe i'll make a how-to thing, once i get mine to work.
btw, i based my PIDs off of the AC pressure wire, but you can always change the # for any of the 5V inputs.
since im a conversion car, i have ALOT of inputs.. the 4 im looking at now are: EGR, AC pressure, Gas Tank Pressure, and Gas Tank Level.. im sure theres more 0-5v input channels im not using..
my only question is, how often does the PCM poll these inputs? if it doesnt poll them enough, then i'll have a slow response as its "stuck" on a value until its updated...
since im a conversion car, i have ALOT of inputs.. the 4 im looking at now are: EGR, AC pressure, Gas Tank Pressure, and Gas Tank Level.. im sure theres more 0-5v input channels im not using..
my only question is, how often does the PCM poll these inputs? if it doesnt poll them enough, then i'll have a slow response as its "stuck" on a value until its updated...
