this is a 6speed transmission 2.5L sentra specv.the idling was a bit high and i check for vac leak,did not find any.cleaned throttle body and problem started, idling started to move from 1200 to 1700 RPM,sometimes stay steady at 1200.i did many times the learning thing with the keys turn and accelerator with no luck,also did the disconnect electric plug from throttle body and plug back and still the same.erased code P0507 with by obdII scanner and same.i think it may be the throttle body,but i want to make sure before i start to spend money on part with no benefit. if any one has suggestion please let me know.is there a way to test the throttle body electric part?
one thing i noticed is the the throttle door do not move when i turn the ignition switch on,and it does open and closed when i turn the switch off.
thanks for any suggestion.
sounds like the throttle body
thanks for reply....i found an A-1 cardone at rockauto for 79.00 returning the core.is this a good one.? and is there a way to test to make sure?
Cel (check engine light) is it on?
Warm the car up
Shut car off
Unplug electrical connection to the throttle body
Turn car back on and itlf it runs the same way its for sure.
But when you did unplug the TB before did you make.sure to unplug the battery before hand?
i did as the instruction says from a old post in this forum.warm the car,then unplug with car running,wait 3 sec then plug back.did not unplug battery
will do as u says sunday and see what comes..thanks.will pot result
ok,got a new throttle body.installed.warm the car did the relearning.still RPM is high.at first was moving from 1200 to1800rpm.no code showing.any suggestion
You got to make sure to disconnect the battery with anything electrical. It resets your ecu ..
Since your idle.is still high, it maybe a vacuum leak, so you hear any air whistling or sucking?
thanks for the suggestions.the problems were,the PVC valve and my son buddy own a car shop and has one of those professional snap on diagnostic machine and was able to do the 3 relearning with his machine.car now run very fine.some how we could not do the relearn manually. thanks much