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View Full Version : help obd1 your my only hope have strange readings on tuner??



swat455
03-31-2013, 06:32 AM
well first off thanks the force is strong here took me a while but i now can log on and read but its all weird.readings dont stay stable. temps are at - temps ramp up and down as with all others tack,oil,etc the dark side is close .with my buick roadmaster 1994..the star wars skit was pretty good though

EagleMark
03-31-2013, 06:44 AM
http://www.gearhead-efi.com/Fuel-Injection/attachment.php?attachmentid=4395&stc=1&d=1364701308

Like Jar Jar that is very annoying!

Use the XDF and ADX file from this thread, connect after engine is running. I made these on my 1994 RoadMaster Wagon.
http://www.gearhead-efi.com/Fuel-Injection/showthread.php?335-16188051-and-16181333-PCM-Information-EE-EEB

swat455
04-02-2013, 02:18 AM
thanks mark I did both i notice it freaks out on first try so i unplug usb and replug hit connect seems to work then so now ive rec data and replayed it how do i know whats right and whats wrong ..also whenscrolling down engine data to the faults they show ok... if on fault what would it say?..so so much to ask thank you guys for your help ...END OF LINE.............

EagleMark
04-02-2013, 03:05 AM
Not sure why your having an issue with a RoadMaster? Other LT1 vehicles have reported that first time fails and a disconnect and reconnect works every time. No need to unplug USB, just disconnect and connect commands in TunerPRo. The LT1 in different cars has different modules tied into ALDL line, Roadmaster has the most and they are all silenced so this is probably their issue. Those commands could be removed in Editing the adx file.

swat455
04-02-2013, 04:05 AM
hi also right too the left of da not connected theres a hz speed should that stay steady or vary ???6.57hz to 8.24hz every other sec

EagleMark
04-02-2013, 04:20 AM
Yes they vary.

Are you getting good data? Post a data log...

EagleMark
04-02-2013, 04:23 AM
..also whenscrolling down engine data to the faults they show ok... if on fault what would it say?
Error! Because that's what I put there. These files are totally customizable, some have nothing when no error or ? when there is one. Depends on who wrote it and how much time they put into it.

Like this $EE when in PE Power Enrichment it says BIG POWER! :laugh:

swat455
04-02-2013, 05:44 AM
hi how would i go posting a data log on here as I have a 15 min log from this morn on her

EagleMark
04-02-2013, 06:14 AM
Reply to thread, go advanced and under the text box is Manage attachments.

swat455
04-02-2013, 06:57 AM
well I hope thats it

swat455
04-02-2013, 10:45 PM
does it look norm?????also is the a referance program that shows me what the engine data should be beside the real data ?

swat455
04-03-2013, 06:30 AM
hi sorry to keep askin ??but i think i see that i can compare bins against my own anybody have a stock 94 roadmaster bin??thats the data right? also i see theres cords forsale. ones that have both 12 and 16 pin those you can reflash the pcm with ??as mines just for data???also does he make a 3 way with obd2????

EagleMark
04-03-2013, 08:36 AM
Yes the data is recording just fine! Looking at BLM Right and Left history tables you have one side lean? Also getting some knock retard in areas where you should not. May have a lean cylinder or injector issue? Play your log back and look through history tables.

Not sure why your cable won't flash? But Robert knows all about the cables and sells some, look here and give him a PM.
http://www.gearhead-efi.com/Fuel-Injection/showthread.php?1592-Support-The-Forum-Buy-ALDL-Cables!

There's a info thread for this $EE mask with lots of bins.
http://www.gearhead-efi.com/Fuel-Injection/showthread.php?335-16188051-and-16181333-PCM-Information-EE-EEB

swat455
04-04-2013, 07:37 AM
ok ok.. so what i see when i look in hist. is the lower the number the leaner and i would say thats the leftside and average/ideal is 140???above that and its rich.is that correct?

EagleMark
04-04-2013, 08:56 AM
Ideal is 128.

From the EFI Dictionary:
http://www.gearhead-efi.com/gm-ecm-pcm-conversion/efi-dictionary.html

INT = The short term fuel trim value is called the Integrator The value of the integrator varies above and below 128 with 128 being no correction. For example, if the Integrator is 135, the ECM is adding fuel because the 02 sensor is reading a lean mixture. If the Integrator is 110, the ECM is removing fuel because the 02 sensor is reading a rich mixture. Anytime the system is not in closed loop, the Integrator will immediately return to a value of 128 and stay there.

BLM = Block Learn Multiplier. Block Learn Mode term is long term fuel trim. BLM value tracks the Integrator but has a delay. If the Integrator increases so does the BLM, but the BLM lags behind the Integrator. The higher the Integrator climbs above 128, the faster the BLM rises. BLM value affects the VE table by adding fuel above 128 and subtracting fuel below 128