What percent should throttle position be at idle?

At idle is should be zero or a couple of degrees. Press down on the gas pedal very S-L-O-W-L-Y until the throttle is all the way open. You should see the percentage of throttle opening gradually increase to 100 percent at wide open throttle.

Why does the idle go up after cleaning the throttle body?

The idle is going to be high at first until the computer relearns the idle again. Cleaning the throttle body allowed more air to enter the engine, and the computer is compensating by adding more fuel.

How to do throttle body re-Learn Chevy Malibu?

1) Start the engine and let it idle in park for 3 minutes. During that period the idle may be higher idle than normal. 2) After 3 minutes, turn the engine off and leave it off for 60- seconds. 3) Start the engine again and let it idle in park for 3 minutes one more time. During these run periods you may see a check engine light.

How long does it take for GM throttle body to relearn?

If you don’t do a relearn procedure, the PCM will “hunt” for a new baseline idle. It will eventually learn it on its own, but it may take over a week of driving, during which time you will experience high and low idle speeds and possibly rough idle. 1) Start the engine and let it idle in park for 3 minutes.

What should the idle time be on a Chevy Malibu?

1. Start and idle the engine in PARK for 3 minutes. 2. With a scan tool, monitor desired and actual RPM. 3. The ECM will start to learn the new idle cells and Desired RPM should start to decrease. 4. Ignition OFF for 60 seconds. 5. Start and idle the engine in PARK for 3 minutes. 6. After the 3 minute run time the engine should be idling normal.

Can a bad throttle position sensor cause idle surging?

Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges. 3) Check Engine Light

Why did my Sierra 5.3L throttle body change?

You said the throttle body was really dirty. The ECM made an adjustment due to the carbon build up on the throttle body. When you cleaned it, you caused a sudden change to the throttle body function and confused the ECM. It should readjust after about 200 miles or so and be back to normal. You need to take a road trip.

What happens when you change the throttle body?

The ECM made an adjustment due to the carbon build up on the throttle body. When you cleaned it, you caused a sudden change to the throttle body function and confused the ECM. It should readjust after about 200 miles or so and be back to normal. You need to take a road trip. Wondering if the stepper motor on the throttle body is messed up.