5.7, Second Gen. Normal Idle Speed?

New to me 2007, 5.7. runs good except for fast idle after warming up. Outside temps. are about 80 deg in FL. After start up the RPM is about 1.8K, (I think this is normal from what I have read.) after warm up out of gear it idles at about 1.2K. In gear with brakes on it idles at 900 RPM. In gear with no throttle it will travel at about 25-30 MPH. I am constantly having to ride the brakes. I did disconnected/reconnected the battery about a week ago, made several short trips and two 20 mi trips. I was told the computer had to relearn the idle settings. After a week nothing has changed. Another note, after getting the truck I changed the water pump and cleaned the MAS and throttle body while I had things pulled apart. I would think a 600-700 RPM would be normal. Any tricks to slow the idle on this 2007.

 

my 2010 idles at around 600 after it warms up.its a little cooler here in
NC.

 

Check throttle body to make sure nothing out of ordinary. Could be sticking

 

2007 5.7L Truck

This was logged about a week ago. 70F outside temp. On startup jumps to about 1,200 and levels out about 670 ish RPM after 10 mins, fully warmed up. When I kicked the AC on near the end RPM jumped to about 750.

Do you know if a previous owner has installed a tune. That would be my first thought as to why yours is so high. You said you cleaned the MAF already, that would have been my first step. Second would be resetting computer which you have done. I would start looking into if it could be "Tuned"

 

Yeah mine idles between 650-750 rpm's after warming up. I think there are many reasons of higher idles. You need to hook up Techstream or OBD2 port scanner and verify some of your sensor settings, IAT, MAF, TPS. look for any vacuum leaks. Cleaning the Throttle body, MAF. Do a before cleaning and after cleaning value check of these pegs. Look for the FSM and the idle relearning/resetting procedure. Hope that helps you.

Look at the last post here - https://www.youtube.com/embed/jHMb83A3wZ4
https://www.tundratalk.net/threads/rough-idle-after-battery-disconnect.377857/

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And this procedure after the engine's warmed up.

I hate getting answers that don't relate to the particular vehicle I'm dealing with, but for what it's worth:

In our FRS (uses Toyota ECM and has drive by wire like Tundra) there is a throttle position reset procedure to follow in order to fix a stumbling gas pedal.


Turn the ignition to on, but don't start the motor
press the gas pedal all the way to the floor slowly and steadily - take about 3 seconds to get to the floor
slowly and steadily release the gas pedal back up - again, about 3 seconds
repeat the press and release for a total of 5 complete down-up cycles
turn the ignition off
start the truck like normal and enjoy the new throttle response


The logic behind this move is that the throttle position sensor needs to know where 0% and 100% throttle are. Since you probably don't go 100% throttle very often while driving, it can take a very long time for the ECM to relearn the throttle values and related throttle plate opening angles.

I'd love to hear how this works for you on the Tundra since I'm about to need to do the same thing after our exhaust and intake install...

 

Like OP I to am a new owner of a used 07, 5.7 and was a little concerned of the high idle. Start up was about 1500 in 40 deg Indiana after and would drop progressively as it would warmed up. RPM would drop to about 1000 warmed and 850 in drive. In drive with no throttle it would travel about 20-25 MPH.

I seen this threat and was glad I wasn't alone in this conundrum and later on I seen this video was posted so I checked the throttle body and did see there was quite a bit of carbon build up!

I fallowed this guys steps, used a little bit of scotch bright and cleaned up the buildup and did as dude said in the video to see if that would help with idle speeds.
Welp! Now when its warmed up it idles at 1200 in park, 900-1000 in drive.
Normal? Sorry to Hijack your Thread @ecl

Updated!
Well it's not normal because it is the incorrect procedure for ECM idle speed relearning after cleaning or replacement of the throttle body.

This thing was was warming up at 1800 rpms in the morning!

What did work and what I did is once the truck is fully warmed up I turned off all accessories anything that could put a load on the alternator then turned the truck off. Cycling the ignition key to on 2x and starting it on the 3rd cycle. Engage the E-brake and set it in drive for 5-7 minutes.
Apparently my E-brake doesn't work either so I had to use a curb down the street at the park. After several attempts the truck is now idling 700ish in park and 600ish in drive.

https://youtu.be/61lLTJJMAB0?t=694