idle is faster than normal. Why?
Thread Starter
Melting Slicks
Joined: May 2005
Posts: 3,394
Likes: 12
From: Leon Iowa
St. Jude Donor '06-'07-'08-'09
idle is faster than normal. Why?
I have no codes. I noticed that when I came up to a stop I had to push on the brakes a little harder. I have an A4. After I set at a stop light for just a bit the idle will go down to normal but for a while it will high idle. It just started doing this. If I put it in park it doesn't seem to do it. Any ideas what this could be?
Burning Brakes
Joined: Nov 2006
Posts: 1,125
Likes: 4
From: Flower Mound TX.
MY 98 dose the same thing ( it has 68,000 miles ). But the idle comes down fast after a sec when i'm stoped. It dose it the worse when I have the air on. It's been that way for some time now. I thought it might me a vacum leak... but checked out car and all is fine. Then I had read some were that this some times happen when the TB is dirty. So I took if off and yes it was dirty ( so I cleaned it ). But it still did the same thing. So I just live with it. I too would like to see what our CF members say on this one.
I too have no codes.
I too have no codes.
Le Mans Master
Joined: May 2006
Posts: 5,987
Likes: 18
From: DuBois PA
St. Jude Donor '11-'12-'13-'14-'15
Hey Guys,
Not sure if this will help, but it couldn't hurt!
Idle Learn Procedure
Anytime the powertrain control module (PCM) or the battery is disconnected, the PCM loses power, or the PCM is reprogrammed, the PCMs learned idle position is lost. The engine idle is unstable when the learned idle position is lost.
Perform the following procedure in order to return the learned idle to the correct position:
Automatic Transmission
Turn OFF the ignition.
Restore the PCM battery feed.
Turn OFF the A/C controls.
Set the parking brake and block the drive wheels.
Start the engine.
Ensure that the engine coolant temperature is more than 80°C (176°F).
Shift the transmission into Drive.
Allow the engine to idle for 5 minutes.
Shift the transmission into Park.
Allow the engine to idle for 5 minutes.
Turn OFF the engine for 30 seconds.
Manual Transmission
Turn OFF the ignition.
Restore the PCM battery feed.
Turn OFF the A/C controls.
Set the parking brake and block the drive wheels.
Place the transmission in Neutral.
Start the engine.
Ensure that the engine coolant temperature is more than 80°C (176°F).
Allow the engine to idle for 5 minutes.
Turn OFF the engine for 30 seconds
Not sure if this will help, but it couldn't hurt!
Idle Learn Procedure
Anytime the powertrain control module (PCM) or the battery is disconnected, the PCM loses power, or the PCM is reprogrammed, the PCMs learned idle position is lost. The engine idle is unstable when the learned idle position is lost.
Perform the following procedure in order to return the learned idle to the correct position:
Automatic Transmission
Turn OFF the ignition.
Restore the PCM battery feed.
Turn OFF the A/C controls.
Set the parking brake and block the drive wheels.
Start the engine.
Ensure that the engine coolant temperature is more than 80°C (176°F).
Shift the transmission into Drive.
Allow the engine to idle for 5 minutes.
Shift the transmission into Park.
Allow the engine to idle for 5 minutes.
Turn OFF the engine for 30 seconds.
Manual Transmission
Turn OFF the ignition.
Restore the PCM battery feed.
Turn OFF the A/C controls.
Set the parking brake and block the drive wheels.
Place the transmission in Neutral.
Start the engine.
Ensure that the engine coolant temperature is more than 80°C (176°F).
Allow the engine to idle for 5 minutes.
Turn OFF the engine for 30 seconds
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
I find that with my stick, if I am rolling and push in the clutch it will do this but once stopped the idle comes down. Not sure why either, but it may be the PCM programming and could also be weather related (colder weather). Might want to re-post in the tuning section and see if anyone there has any input.
Instructor
Joined: Oct 2006
Posts: 115
Likes: 0
From: Dallas TX
I find that with my stick, if I am rolling and push in the clutch it will do this but once stopped the idle comes down. Not sure why either, but it may be the PCM programming and could also be weather related (colder weather). Might want to re-post in the tuning section and see if anyone there has any input.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Take a look at the PCV valve and rubber connection to the intake. Mine developed a hole on the bottom of the line that wasn't obvious at all. Caused high idle speeds and rough take offs from a stop.
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Thread Starter
Melting Slicks
Joined: May 2005
Posts: 3,394
Likes: 12
From: Leon Iowa
St. Jude Donor '06-'07-'08-'09
Instructor
Joined: Jan 2006
Posts: 114
Likes: 0
From: Sachse Texas
Funny you should ask..well I know u port throttle bodies(cause I just bought 1 from ya). I was just at LG this morning and asked Sean if I needed to do any tuning when I install your ported TB and he said probably not, but sometimes the idle could get erratic in which case he would tune out some air I think is what he said.
Thread Starter
Melting Slicks
Joined: May 2005
Posts: 3,394
Likes: 12
From: Leon Iowa
St. Jude Donor '06-'07-'08-'09
Funny you should ask..well I know u port throttle bodies(cause I just bought 1 from ya). I was just at LG this morning and asked Sean if I needed to do any tuning when I install your ported TB and he said probably not, but sometimes the idle could get erratic in which case he would tune out some air I think is what he said.