Celica Forums General Discussion General engine question

hey guys, question, last night while i was sitting in traffic, my gear stick was set to neutral and my engine kept reaving up from 0-2 back and forth... it did this until i moved ahead in traffic... what's up with that?? thanks!

Were you tapping your foot to some music?

clean your MAF sensors

nope, i wasn't tapping anything.. okay thanks for your help... :-) I'll try that..

you should also clean the throttle body

yeah and the IAC valve. If you have CAI it could of been bogging.

wouldnt be bogging. bogging is when you try to go but your power drops lol

I'd suggest the maf and clean the tb & iac also.

god damn you man! fuck! oh well, learn something new everyday.

THis happens on my Celi too when I first turn it on. It usually stops after a minute to me. My Car revs around 1k-2.5k back and forth. It only started since it got really cold around here.

Mine does that too. Does anyone have a "how to" for cleaning the MAFS?

I'm not 100% sure, but I believe the small increases in rpm's is an electronic choke. It's totally different than older cars, and probably to complex for me to understand, but I think that's what it is.

here's the "how to"

https://celicahobby.com/ubbthreads/thread.f0_1862388016_0_collapsed_5__1.html#1862388016

yes i just took my car to the dealer for this and they wouldnt even look at because the rd test went fine. it only hapend to me twice after it started getting cold here.--also does anyone's reverse gear make weird noises when backing up sometimes???

well it hasn't done this since.. should i worry about it right now or can i wait until it starts happening on a basis... i'm kinda poor right now..

i dont know mine only did it twice and has been good for like 2 weeks so see if it keeps happening

well, back when I had my lexus, it started doing the reving between 1-3K RPM, it didnt have anything to do with sensors, it was the alternator going bad, but it wasnt shot yet, it was just laboring and putting pressure on the pulley system when it tried to activate at idle. maybe your alternator is bad

The alternator is a pretty good answer actually. If your sensors and tb are cleaned and now in check, and you still have that problem, it could very well be the alternator. Steal someones OBD reader and see if any codes pop up

i wouldve never guessed it would be an alternator- i am only running a 300 watt rms system is our alternator thAt weak?

so check the sensors first, then the alternator??

this always happends to me but it goes away, then comes back months later, weird, maybe i need a new alternator

Mine does it too, an '04 GTS with the electronic throttle. I've got less than 8K miles on the car. It could be a dirty MAF, but with this few miles, I'm having a hard time believing it. So, maybe its the electronic throttle.

well my 2002 doesnt have that and on thursday it happend to me for the 3rd time in a month and only throwing it in nuetral then back to drive works to fix it