can someone tell me why my 02s are doing this
08-25-2007, 02:40 PM
#1
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Join Date: Oct 2001
Location: NC Burlington
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can someone tell me why my 02s are doing this
http://www.mediafire.com/?cdsdyglc2tm
ok heres the basics of the setup. no emissions equipment, 10 degrees of timing pulled out to break in the motor, larger injectors have been programmed in though the use of LT1 edit along with the new cylinder size. car sits and idles fine but you can hear some knock but very very little. the car has new ac delco 02 sensors in it. pump 93 gas, thats fresh. if any other info would help just let me know. i can't figure it out. i am going for a base tune on thursday but would like to have this issue resloved if possible. thanks for any help you folks can offer.
notice my sig , i am having issues with the 2nd one
ok heres the basics of the setup. no emissions equipment, 10 degrees of timing pulled out to break in the motor, larger injectors have been programmed in though the use of LT1 edit along with the new cylinder size. car sits and idles fine but you can hear some knock but very very little. the car has new ac delco 02 sensors in it. pump 93 gas, thats fresh. if any other info would help just let me know. i can't figure it out. i am going for a base tune on thursday but would like to have this issue resloved if possible. thanks for any help you folks can offer.
notice my sig , i am having issues with the 2nd one
08-25-2007, 07:22 PM
#3
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Join Date: Oct 2001
Location: NC Burlington
Posts: 584
OBDI 383, tfs reworked heads, decent hr cam, versafueler with 57lb injectors (was going 1 route then changed to the path i am on now. i didn't want to loose money on the injectors so i kept them) mallory 685, brand new ac delco 02's, knock sensor checks out fine, plugs and wires brand new, msd opti. i used lt1 edit and changed the injector value and the cylinder size. i also took 10 degrees of timing out of the 400 to 4000 rpm band. all the emissions stuff is gone, even crusie control. ac is out and so is the heater box. it runs decent but the 02 readings just keep falling the entire time. i keep a good 1 to 3 degrees of KR and it spikes sometimes. i fouled a set of plugs that i had gapped at 35 (300 nitrous shot) so i came up 1 heat range last night, i haven't rechecked the new ones today yet. i just feel like its something thats not sending a signal back or something. it has to be something stupid and simple, i just can't locate it. i am only getting the 26 dtc now.
08-26-2007, 12:33 PM
#4
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ok with a heat range hotter (autolite 3924) they are still getting fouled out. so what would send a signal to the injectors to keep adding fuel? especially since the O2's are reading like they are
08-28-2007, 07:01 PM
#5
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Location: NC Burlington
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http://www.mediafire.com/download.php?5k2z9zm5vgy#
thanks to user803815 on the LT1 edit mailing list , i found the problem. The fuel injector circuit was to weak to feed the voltage needed for the injectors. i ran a 12 gauge wire and feed it off a relay that is feeding the versafueler. I also went back, after the 02's readings were good, and cut all the crimp style fittings out and soldered all the connections.
thanks to user803815 on the LT1 edit mailing list , i found the problem. The fuel injector circuit was to weak to feed the voltage needed for the injectors. i ran a 12 gauge wire and feed it off a relay that is feeding the versafueler. I also went back, after the 02's readings were good, and cut all the crimp style fittings out and soldered all the connections.
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