hey whats up we have another problem with my friends jdm b16 hatch...okay here it is.... as soon as we start the car it sounds like ur reving it back and forth to 3k meanwhile ur not even touching the throttle...and when we rev it to around 4-5k...it sounds like its bouncing off the rev limiter.... any ideas as to why its doing these 2 things???

 

check the wiring and check the sensors. Check codes too if any

 

which sensors would most likley do this

 

tps sensor might be messed up. Its in yor throtle body

 

i dun think so...because my tps and map sensor were switch and the car wouldnt rev then i realized it was switch and put both sensors in there correct place..and the car can rev but idles weird...my friend said it could be the idle air control valve...but im open to other ideas u guys have..

 

your tps sensor will make your rpms bounce eradically. if you had them plugged in wrong then it kick your cel and it might have sent your ecu into safe mode

 

that sounds exactly what my swap sounded like, it is was that the tps and map were switched. double check that you didn't switch back to the wrong way instead of the right way.

 

like what everyone said, tps, if you know you got the correct wires in place, i would try changing tps or changing throttle body...see if that help bro good luck!