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hi
i have a 98 Yukon with a 454 engine and 4l80e transmission no O2 sensors and no cat could any one help its not running right and consuming to much fuel like its always rich and no power.
this is my first attempt of tuning so please don't make fun off me.
Are you tuning the black box? Or is it 0411 swapped? Are the o2 sensors physically deleted or just in the tune? Either way, why were they deleted?
Post your tune and a log file of it running. Log a lot of PIDs ECT, TPS, MAP, RPM, speed, IAT, o2 sensor voltages and trims if they're physically in the truck still, MAF readings.
the engine is swapped.and the o2 sensors are not in the truck it is a daily driver + off rode use. i have 2 boxes one off them i got it from a friend it is working fine but it is some how locked and it can not be modified.
please excuse my poor English because its not my original language.
Attachment 80414 Attachment 80415 Attachment 80416Attachment 80414Attachment 80415Attachment 80423
Do you have a wideband o2 sensor? You're going to need one to be able to tune this thing. Are there any modifications to the motor?
You need to make sure its not trying to enter closed loop. Change the CL enable temp to like 250 degrees. Make sure you have all the o2 related error codes disabled as well. On a side note, your PE enable still has the 60s delay. I'd remove that and lower the enable rpm to like 3000.
i do not have the o2 sensor. i am going to get one and install it ind wire it do i need just one ore tow of them ? there is no modification on the motor except i might install hho on demand device. after i install the o2 sensor ill get back to you. thanks for your help.
I would do two so you know there aren't any issues between banks (like injector or misfire issues).