Hello all,
I have a 1st gen 1uz I rebuilt that I recently swapped into my 1992 Toyota pickup and I am having some issues now keeping the engine running and not holding an idle. I have purchased wiring instructions from gloverman and wired it up properly and for the time being have the engine running. As far as I can tell here is everything I have checked
- verified o2 sensors are plugged in and working
-verified MAF is working
- good fuel (walbro pump hardwired for key on while testing)
- all new cap/rotors/plugs/dizzy
- all timing and tension components are correct and brand new (running just fine on the test bench)
- verified TPS position via multimeter
- checked and no codes are present, just the flashing bulb to indicate no codes found
- ECU was professionally rebuild by a UZ specialized company
The engine starts for about 2 seconds and dies immediately unless you keep your foot on the throttle, when you do force it by doing so it runs quite rough and occasionally misses. I did pull a plug today and it was very very sooted which I think may account for the misfiring? I believe with the 02s were out it went into a closed safety loop and ran rich to avoid leaning. I am going to clean the plugs today but was wondering if anyone had any idea on the no idle? really a head scratcher for me
The only things electrically aren't plugged in on the engine sensor is the EGR plug and there others that I have attached feel free to let me know if thats what I am missing. Im open to ideas because at this point im a bit more then even puzzled
is there a NSS in the trans harness that maybe I need to bridge? would a completely stuck IACV do this maybe? Do I need to adjust the throttle stop?
Thanks again,
Sam
I have a 1st gen 1uz I rebuilt that I recently swapped into my 1992 Toyota pickup and I am having some issues now keeping the engine running and not holding an idle. I have purchased wiring instructions from gloverman and wired it up properly and for the time being have the engine running. As far as I can tell here is everything I have checked
- verified o2 sensors are plugged in and working
-verified MAF is working
- good fuel (walbro pump hardwired for key on while testing)
- all new cap/rotors/plugs/dizzy
- all timing and tension components are correct and brand new (running just fine on the test bench)
- verified TPS position via multimeter
- checked and no codes are present, just the flashing bulb to indicate no codes found
- ECU was professionally rebuild by a UZ specialized company
The engine starts for about 2 seconds and dies immediately unless you keep your foot on the throttle, when you do force it by doing so it runs quite rough and occasionally misses. I did pull a plug today and it was very very sooted which I think may account for the misfiring? I believe with the 02s were out it went into a closed safety loop and ran rich to avoid leaning. I am going to clean the plugs today but was wondering if anyone had any idea on the no idle? really a head scratcher for me
The only things electrically aren't plugged in on the engine sensor is the EGR plug and there others that I have attached feel free to let me know if thats what I am missing. Im open to ideas because at this point im a bit more then even puzzled
is there a NSS in the trans harness that maybe I need to bridge? would a completely stuck IACV do this maybe? Do I need to adjust the throttle stop?
Thanks again,
Sam