a couple questions
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From: Nashville, TN
Car: 91 Z28
Engine: Lt1
Transmission: T56
Axle/Gears: 3.70 auburn pro 9"
a couple questions
First question, Im using the snapon scan tool and im reading a lean condition when the on open loop but then once it goes to closed loop it get RICH and never leans out at all, where useing tunercat in $8D can i lean out the closed loop fuel/air
Second question, once it goes into closed loop she runs good just real rich, exept if i try to go over 3800 4000 rpms she sputters and wont even run right i know this is a WOT calabration but where do i start? im dealing with the stock ECM on a 91 Z28 SD , and the tunercat progam.
also is there any websites that give examples of the mods and whet was done to the eprom, i found a couple but i was looking for more, thanks guys youve been a big help already- TOT
Second question, once it goes into closed loop she runs good just real rich, exept if i try to go over 3800 4000 rpms she sputters and wont even run right i know this is a WOT calabration but where do i start? im dealing with the stock ECM on a 91 Z28 SD , and the tunercat progam.
also is there any websites that give examples of the mods and whet was done to the eprom, i found a couple but i was looking for more, thanks guys youve been a big help already- TOT
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Joined: Jun 2000
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From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
<font face="Verdana, Arial" size="2">Originally posted by Tricked-Out-Toy:
First question, Im using the snapon scan tool and im reading a lean condition when the on open loop but then once it goes to closed loop it get RICH and never leans out at all, where useing tunercat in $8D can i lean out the closed loop fuel/air
Second question, once it goes into closed loop she runs good just real rich, exept if i try to go over 3800 4000 rpms she sputters and wont even run right i know this is a WOT calabration but where do i start? im dealing with the stock ECM on a 91 Z28 SD , and the tunercat progam.
also is there any websites that give examples of the mods and whet was done to the eprom, i found a couple but i was looking for more, thanks guys youve been a big help already- TOT</font>
First question, Im using the snapon scan tool and im reading a lean condition when the on open loop but then once it goes to closed loop it get RICH and never leans out at all, where useing tunercat in $8D can i lean out the closed loop fuel/air
Second question, once it goes into closed loop she runs good just real rich, exept if i try to go over 3800 4000 rpms she sputters and wont even run right i know this is a WOT calabration but where do i start? im dealing with the stock ECM on a 91 Z28 SD , and the tunercat progam.
also is there any websites that give examples of the mods and whet was done to the eprom, i found a couple but i was looking for more, thanks guys youve been a big help already- TOT</font>
do you mean the BLs are correcting for a rich condition, or are having to be commanded rich?
If it's pig rich, I'd check the Fuel Pressure first.
If that's fine the slowly reduce the VE numbers in the rpm vs Map table.
Where have you been, for info?.
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