so today i did my normal air filter cleaning and removed my cold air set up and throttle body to clean my throttle body after wiping it off i put it all back together problem now is my idle is staying at like 1200-1500 and not going lower and when i rev it up and the idle gos down it jumps a bit than back to 1200-1500 my car ran fine before i cleaned the throttle body today so any one have any thoughts ?


i even ripped it back apart and double checked it was all dun right and it was so i am lost for words here

 

Check your MAF sensor...

 

i did and its clean plugged in correctly and all the clamps that hold it to the intake are tight was the first thing i checked along with the rest of clamps and plug to throttle body all on correctly has me stumped

 

Try the Idle Air Volume Relearning instructions below. Unless you damaged your TB when cleaning it this should fix your issue.





Technical Articles: G35- How to:Reset ECU, Throttle Pedal Release & Idle Air Volume Learning




How to reset your ECU and perform the Throttle Pedal Release and Idle Air Volume Learning procedures on an Infiniti G35 and the Nissan 350Z.

Before attempting any of the following procedures, it is advisable that you read through the instructions thoroughly and familiarize yourself with them.

A stop watch or an analog clock with a second’s needle will be useful.
**a quick reset can be accomplished by disconnecting the negative battery terminal, and depressing the brake a few times.

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.

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 to “ON”.
3. Turn ignition switch to “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.

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. Confirm that the accelerator pedal is fully released, then 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.

 

So last night I tried the resets with the key and nothing still idling at 1500 still lost for words here lol Dam TB

 

Check any other wire harnesses and vacuum lines. Same thing happened when i had my Monte Carlo SS. Ended up being a loose vacuum line.

 

Did that like 45 min ago lol but all look great wires are good both the plugs to the air meter and the TB are tight and the breather line is good to pooped all of it back off to make sher the gasket betwean the tb and plenum were ok and it was fine and all the clamps are tight driving me nuts

 

If you can get a spare throttle body and do the reset with the new one. You may have damaged it when cleaning it which is very possible.

 

OP did you unplug your battery before you messed with your TB?

 

i did not un plug the battery before i removed the TB im thinking this is what caused what ever is making idle so dam high and i dont think i hurt the TB when cleaning it i was vary gentle with it and used a damp rag to wiped it clean was nasty

 

Did you move the throttle plate at all when you cleaned the TB? That has been known to mess them up and they can't be fixed. They're super touchy.

 

I did move it but was ever so carefull and it's not the first time I have clean it or moved it this is the 4th time I have dun it but it is the first time I have taken it out and unplugged it I'm thinking that not disconnecting
The battery before I removed the TB caused some sort of problem but what is causing the prob ???? grrrr

 

damn dude shoulda unplugged the batt before unplugging the tb. make sure ur doing all the relearn procedures correctly esp the idle relearn one cus thats the most important one and the one that will fix the issue.

on a side note when u guys did the valve closed relearn u guys hear anything? cus when i do it i dont hear $hit. but since the procedure is so dummy proof i jus assumed i did it right even thought i dont hear no "operation sound"

 

I heard it move when I did it but I had the hood open and I was in my garage

 

^wats it sound like? is the tb plate jus opening and closing? when u turned the key to on did u wait a sec or not and jus turned the key to off right after?