Long story short, I was cleaning the TB a few weeks back and touched the butterfly plate. I received the infamous p0507 (high idle) code. I've read thread after thread, post after post regarding this. I've performed the Idle Air Relearn and ECU reset, which did bring the engine speed below 1000rpm, however the engine is still surging to 1500 frequently. This is f'n ridiculous.

I've had one person provide helpful info on the other .org; he's telling me I need a new TB. Before I go drop hundreds on this.... there has to be more info. There is a ton of discussion regarding this in the 5th gen section, but everyone seems to do something different. Some ppl are having success, some not. WTF?

Who here has experience with these procedures or problems?? I'm about to give in and take this bucket into the dealership where, no doubt, they will charge me an outrageous amount for running Consult II. Maybe thats my best bet...

Question, is there a Idle Air Control Valve (IACV) on our cars? If so, where the hell this thing? I read that some 5th gens don't have it... and cannot find anything about it on 6th gens. Maybe that should be a clue?

Again, there are a ton of posts in the 5th gen section, but very little here. Can we get some solid info/discussion regarding this and similar issues for our 6th gens??

 

i don't see how simply replacing the tb would change anything so i'd have to disagree and say that that is not the problem. i also can't say for sure but i do believe that your car did not come with a iacv but only solenoids to control the idle. there are ways of testing the solenoids to make sure that they are working properly so that's where i'd start.

 

what about the throttle relearn? If your doin 1 do'em all.


ECU Resetting Procedures
Timing is extremely critical. If it is NOT DONE within the specify time, the ECU will not reset and the Check Engine Light (CEL) will continue to remain ON.
A stop watch or an analog clock with a second’s needle will be useful.
Operations Procedures
1. Confirm that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
2. Repeat the following steps (2a and 2b) procedures quickly five times within 5 seconds.
2a. fully depress the accelerator pedal (HARD).
2b. fully release the accelerator pedal.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the CEL starts blinking.
4. Fully release the accelerator pedal (while the CEL is still blinking
5. Wait about 10 second.
6. Fully depress the accelerator pedal and keep it for more than 10 seconds.
7. Fully release the accelerator pedal (The CEL light will continue to blink).
8. Turn ignition switch to “OFF” position and now you can start the car. The CEL light should be gone.
If the CEL light continues to remain ON, repeat the above steps. Timing is EXTREMELY critical to resetting the ECU.

Accelerator Pedal Release Position Learning
Operation Procedure
1. Make sure that the accelerator pedal is fully released.
2. Turn ignition switch “ON” and wait at least 2 seconds.
3. Turn ignition switch “OFF” wait at least 10 seconds.
4. Turn ignition switch “ON” and wait at least 2 seconds.
5. Turn ignition switch “OFF” wait at least 10 seconds.


Throttle Valve Closed Position Learning
Operation Procedures

1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch is “ON”.
3. Turn ignition switch is “OFF” wait at least 10 seconds.
Make sure that the throttle valve moves during above 10 seconds by confirming the operating sound.

Idle Air Volume Learning (Throttle Position Learning)
It is better to count the time accurately with a clock.
Operation Procedures

1. Perform “Accelerator Pedal Released Position Learning”.
2. Perform “Throttle Valve Closed Position Learning”.
3. Start engine and warm it up to normal operating temperature.
4. Turn ignition switch “OFF” and wait at least 10 seconds.
5. Conform that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
6. Repeat the following (steps 7a, 7b) procedures quickly five times within 5 seconds.
7a. Fully depress the accelerator pedal (HARD)
7b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the Check Engine Light (CEL) stops blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the CEL is ON.
10. Start engine and let it idle.
11. Wait 20 seconds.
12. Rev up the engine two or three times and make sure the idle speed and ignition timing are within the specifications

 

I read somewhere in the 5th gen forum that if you physically touch the butterfly valve in the TB, even the slightest movement can throw off its position causing a code.

 

So apparently I'm the only one here who has attempted to clean the TB and had issues afterwards? I find that hard to believe...

I did perform all procedures... again, there was a change but there is still a surging idle when shifting and the CEL is on.

 

I had this issue. I was going out of town so i disconnected the battery while i was gone. Did the trick. I've heard that you have to leave it disconnected for 72hrs

 

72hrs? That's wild man! Did you also have the associated surging rpm when shifting? If so, after the 72hrs everything was back to normal?
Thanks for the input

 

Yea man, that p0507 never came back

 

Good advice guys. I've tried every relearning procedure and once car was shut off and restarted later on, code came right back. Now all I gotta do is go outta town for a few days. I'll let you know all know how it goes.