how to adjust idle speed on 2007 toyota corolla

45

Asked by Oct 07, 2015 at 10:09 AM about the 2007 Toyota Corolla CE

Question type: Maintenance & Repair

Idle speed too high 1100-1200 rpms

5 Answers

143,285

You can't. The idle speed is sent to throttle body from the ECU from several inputs, the MAF, Etc. Some sensor is sending a false signal to ECU or has failed. You need an OBDII scan, no matter if the Check Engine Light is lit up or not, that hopefully point you to what sensor is fooling the ECU. Your car has drive-by-wire, or electronic throttle control so there is no adjustment as on a cable. My Corolla idles at about 900 to 1000 warm, 1200 cold, so it's not that bad. Needs attention yes but not critical OR--- You have a vacuum leak somewhere. If you are a DIY guy use an UNLIT propane torch and wave it around the intake and see if it idles even higher... and look for any vacuum hoses disconnected or broken

6 out of 6 people think this is helpful.
143,285

You can try cleaning the IAC and throttle body. Just might work https://www.youtube.com/watch?v=mfauGoGXCmo https://www.youtube.com/watch?v=mGs0j5FT220

4 out of 4 people think this is helpful.
45

I've been toying with this problem for a few months with all previous and current answers: Check engine mounts; Check vacuum hoses and air manifold for leaks; Clean throttle body; Clean and test idle air control. No change to idle speed or engine vibration. No ECU problems indicated. By the many member entries with the same or similar problems, I am beginning to believe that this is a cronic and non-adjusting or reversing problem, and "normal behavior" of Toyota cars. A friend with a 2004 Camry has been battling the same problem (high idle and engine vibration) for a few years with no solution from a local Toyota dealer or local repair shop. My question now is, "Can the accelerator pedal sensor positioning be adjusted to lower/raise the idle speed?" Anybody?

3 out of 3 people think this is helpful.
143,285

No. It can not. I highly wish somebody else will chime in on this thread and either agree or say I am wrong and explain. But the 'drive by-wire' electronic throttle is a rheostat. Non adjustable But as stated. my '06 Corolla, which is identical except trim same engine idles at 900 to 1000 warm. Is your car warming up to middle of gauge? I am beginning to think it's stuck in open loop, when the 02 signals are ignored by ECU for cold start, but not going to closed loop when warm - IF- If that is the case would explain it - the ECU 'thinks' the car is cold

3 out of 3 people think this is helpful.
56,825

Sounds like all the usual bases have been covered here. I can think of one more though. Reflash the computer with more current software. It's possible that, since this sounds like a reoccurring problem with some Toyotas, a sensor has shifted value. But not enough to trigger the check engine light. Another thought that comes to mind is the battery. Has it recently been replaced or disconnected for some reason. On my '08 Grand Marquis (different car, I know) if the battery is disconnected a first time start up procedure must be followed or the idle can be excessively high due to the mispositioning of the IAC (Idle Air Control) valve. Excessive output of the alternator can result in a high idle speed as well. But you'd have overcharging of the battery as evidenced by gassing (foul odor near the battery) and excessive water usage. Frequent light bulb burn outs are a sign of overcharging as well. HTH. -Jim

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

Corolla

Looking for a Used Corolla in your area?

CarGurus has 68,394 nationwide Corolla listings starting at $988.

ZIP:

Search Toyota Corolla Questions

Toyota Corolla Experts

#1 FordNut
FordNut
Reputation 15,440
#2 Tom Demyan
Tom Demyan
Reputation 2,110
#3 tenspeed
tenspeed
Reputation 1,780
View All

Related Models For Sale

Used Toyota Camry
1,495 Great Deals out of 100,431 listings starting at $700
Used Honda Civic
1,155 Great Deals out of 66,086 listings starting at $1,500
Used Honda Accord
1,228 Great Deals out of 77,867 listings starting at $969
Used Toyota RAV4
1,106 Great Deals out of 54,819 listings starting at $1,999
Used Nissan Altima
1,126 Great Deals out of 84,825 listings starting at $695
Used Nissan Sentra
729 Great Deals out of 52,674 listings starting at $2,000
Used Toyota Tacoma
789 Great Deals out of 33,560 listings starting at $2,988
Used Hyundai Elantra
905 Great Deals out of 53,073 listings starting at $1,799
Used Mazda MAZDA3
474 Great Deals out of 27,572 listings starting at $1,995
Used Toyota Yaris
103 Great Deals out of 10,307 listings starting at $1,745
Used Honda CR-V
1,295 Great Deals out of 73,892 listings starting at $1,650
Used Toyota Prius
502 Great Deals out of 24,134 listings starting at $1,950
Used Hyundai Sonata
965 Great Deals out of 49,865 listings starting at $700
Used Toyota 4Runner
389 Great Deals out of 20,275 listings starting at $2,995
Used Ford Focus
1,230 Great Deals out of 59,542 listings starting at $1,395

Used Cars For Sale

2017 Toyota Corolla For Sale
34,305 listings starting at $15,596
2016 Toyota Corolla For Sale
131 Great Deals out of 8,171 listings starting at $10,977
2015 Toyota Corolla For Sale
379 Great Deals out of 6,944 listings starting at $9,500
2014 Toyota Corolla For Sale
271 Great Deals out of 5,633 listings starting at $7,962
2013 Toyota Corolla For Sale
206 Great Deals out of 3,092 listings starting at $6,490