Weird sr20det lean out issue at start up and cruising.

[4x4le]

Originally Posted by ryder2101

Put in new tps, check voltage. Getting 0.45/0.46 close so that's fine.

You would think...... But that isnt always the case. I have seen cars with unmodified ecus that take various tps voltages in order to get the ecu to realize the tps is closed. This is in fact the only thing "self learn" (at least that my observations have proven to reset) is.

I dont know if there is a series of things you can do to clear the self learn or if just leaving the battery unhooked for a while will do it (it may not, I dont know what clears it but I have seen cars with it triggered at voltages not specified by the fsm).

Everyone seems to think that the voltage specified in the fsm is the "end all, set it there and forget it" voltage but that is not the case. If the self learn memory was cleared for whatever reason, however it gets cleared (dunno), and the next time you turn your key on you better hope your tps isnt set wierd or your throttle isnt depressed or you will have a crappy running car.

With data scan, there is a simple button to clear the self learn, and as long as your foot isnt on the throttle and your tps is set close to right, it will take that as your closed throttle voltage even if it isnt per the fsm.



With all that said, it does not seem like what your problem is, however you are diagnosing this aspect of your problem wrong and you cannot quite check it off your list just yet.