Idle Speed
#1
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Scion Evolution
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Join Date: Sep 2003
Location: Chicago, IL
Posts: 1,214
Idle Speed
Sometimes when my 5spd xB is at idle, the rpm's get a little crazy. I'll be sitting at a light, and the tach will start to drop until it shudders a little bit like it's going to stall, and then it jumps back to normal. It is really slight, but I just wanted to know if I should be concerned. My old VW used to do the same thing, especially with the AC on, but it was a piece of junk. should I be worried about the new car?
drew
drew
#3
Mine does the same thing. It has been mentioned before. It might have something to do with the AC compressor cycling on, but some report this happening even when the AC is off.
I will mention it at the first service. Toyota might issue an update on the engine software to fix it. Or they might not.
George
I will mention it at the first service. Toyota might issue an update on the engine software to fix it. Or they might not.
George
#5
My car does it all the time when I have been running it a lil harder I dont ever use the A.C. so I dont think that is it. I have also noticed it doesnt do it just when the fan is on. Must be the cam gears....jk
#8
sounds like a pulley or engine problem.
I would suggest cleaning out your throttle body, but being that the car has low milage, Im assuming here, you shouldnt need it.
What you might want to do is check your alternator. Mine died last week, on my 240SX, and the idle was rough the entire way home the night it died...
Being as these cars are all new and what not, call the dealership and ask if there are any service bulletins regarding the issue...
I would suggest cleaning out your throttle body, but being that the car has low milage, Im assuming here, you shouldnt need it.
What you might want to do is check your alternator. Mine died last week, on my 240SX, and the idle was rough the entire way home the night it died...
Being as these cars are all new and what not, call the dealership and ask if there are any service bulletins regarding the issue...
#9
I can pretty much guarantee that it is a bad (faulty from the factory probably) o2 sensor. At my garage this is the problem with 90% of the cars which come in with low idles. o2 sensors are cheap, and in most cases universal, so if you are too lazy to bring it up with your scion/toyota dealer, just go to pep boys and buy a bosch universal o2 sensor, switch it out, and be done with it. If that doesnt fix it, i'm guessing it has to do with your power current.
#10
Idle speed problems in my XA
I am also noticing a problem with my idle speed. If I driving in stop and go traffic, especially when I stop at a light, the idle always seems to dip to about 400 rpm, or so, then it goes back to normal. And the is with the AC OFF! It repeats this cycle every 20 seconds or so. I have been worrying about it so much, I've started to time the cycles
I called Scion Support, and they said they were gonna bring this issue up with Toyota for a possible Maint. Bulliten. On my next oil change, I am going to have the o2 sensors checked out. I hate, hate, hate, erratic idle speeds. They have followed me from my Accord, to my Protege, and now to my XA.
DOH!
jr
I called Scion Support, and they said they were gonna bring this issue up with Toyota for a possible Maint. Bulliten. On my next oil change, I am going to have the o2 sensors checked out. I hate, hate, hate, erratic idle speeds. They have followed me from my Accord, to my Protege, and now to my XA.
DOH!
jr
#12
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DelMarVa
Scion Tuners
DelMarVa
Scion Tuners
Join Date: Jan 2004
Location: NOVA, DC,MD,OHIO,NC,VT,NY
Posts: 184
make sure your fuel injector plugs are fully snapped in i had this problem on my other car for a while, i looked under the hood and one of the fuel injector plugs was barely pluged in , so i pluged it in and problem fixed, just check it out and see if that is the problem. it might be.
#14
mine does the dropping idle thing too, i usually notice that the radiator fan seems to go on when this happens, i'm sure it's just hte extra strain on the electrical system that causes it - maybe a ground wire kit and a stonger aftermarket batttery would solve it?
#16
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Scion Evolution
Join Date: Jul 2003
Location: www.scionevolution.org
Posts: 525
I noticed that problem also and started with a grounding kit it helped, and then I started adding ICE. I upgraded the battery to an Optima yellow top with a Hyper Ground voltage stabilizer. The lights and electronics seemed to be better but idle was slightly noticeable. I was able to get in on the K&N cold air intake sponsorship and replaced the AEM unit I ordered with the car; my idle has been stable since then. Not sure if all of the above made this work or just changing the intake. I want to say thanks again to James Yim from K&N who sponsored several of the Team Scion West cars. :D :D :D
#17
i know on some cars the computer will alter the timing on the engine so that it will run rough to check if there is any knocking. Like the car is testing itself so u do not run into a bigger prob in the future. I dunno how that helped but its just a little piece of info.
#18
Originally Posted by daverf230
i know on some cars the computer will alter the timing on the engine so that it will run rough to check if there is any knocking. Like the car is testing itself so u do not run into a bigger prob in the future. I dunno how that helped but its just a little piece of info.
Thanks for the tip. I'd love to believe that it was my car "testing itself," and not something else. But, I am going to check my Fuel injector plugs, grounding kit, and ask about synthetic oil, when I bring my car in for it's first oil change.
Like I said, it only does the idle drop, when I am in stop and go traffic.
#19
Re: Idle Speed
Originally Posted by DibujoB
Sometimes when my 5spd xB is at idle, the rpm's get a little crazy. I'll be sitting at a light, and the tach will start to drop until it shudders a little bit like it's going to stall, and then it jumps back to normal. It is really slight, but I just wanted to know if I should be concerned. My old VW used to do the same thing, especially with the AC on, but it was a piece of junk. should I be worried about the new car?
drew
drew
Hope this helps.