Plug in o2 sensors motor stumbles help
08-30-2011, 08:55 AM
#1
Staging Lane
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Plug in o2 sensors motor stumbles help I'm just finishing up my first lq\ls motor swap here are some specs
97 s10
2002 lq4 motor 90k
Torquer V2 cam
springs pushrods
t56
everything else basically stock
My question is i finally started my truck and with the 02's unplugged sounds and idles pretty good. As soon as i plug the o2 sensors in the motor stumbles and smells real rich? Any suggestions and comments are welcome.
Thanks in advance
97 s10
2002 lq4 motor 90k
Torquer V2 cam
springs pushrods
t56
everything else basically stock
My question is i finally started my truck and with the 02's unplugged sounds and idles pretty good. As soon as i plug the o2 sensors in the motor stumbles and smells real rich? Any suggestions and comments are welcome.
Thanks in advance
08-30-2011, 10:22 AM
#2
With that cam, the engine needs a tune...
Hooking up the O2's is likely putting the system into closed loop. The PCM is then trying to correct the AFR, and has bogus input to work with...
A scan and data logs are a start.
U don't have the sensor plugs crossed, do you?
Until U have data logs, and scan info, U R pretty much pounding sand in a rat hole!
Hooking up the O2's is likely putting the system into closed loop. The PCM is then trying to correct the AFR, and has bogus input to work with...
A scan and data logs are a start.
U don't have the sensor plugs crossed, do you?
Until U have data logs, and scan info, U R pretty much pounding sand in a rat hole!
08-30-2011, 11:17 AM
#3
Staging Lane
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Ok thanks
i know the pcm needs a tune i am just getting it started.
I am not sure about the plugs i will have to check.
As far as a scan i will have to see about getting one.
thanks
i know the pcm needs a tune i am just getting it started.
I am not sure about the plugs i will have to check.
As far as a scan i will have to see about getting one.
thanks