Low Idle after warm up
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Junior Member
Joined: Jul 2006
Posts: 151
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From: San Jose, CA, USA
Low Idle after warm up
1999 prelude base model.
After warm up the idle seem to be around 400 rpm. I tried to adjust the idle screw still nothing.
No check engine light.
It would stall on me whenever I'm making a turn and not pressing the gas. Drives perfectly fine but it wont idle low after warm up. Like it wants to stall.
Anyone has any idea what this could be?
After warm up the idle seem to be around 400 rpm. I tried to adjust the idle screw still nothing.
No check engine light.
It would stall on me whenever I'm making a turn and not pressing the gas. Drives perfectly fine but it wont idle low after warm up. Like it wants to stall.
Anyone has any idea what this could be?
Junior Member
Joined: Nov 2008
Posts: 38
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Re: Low Idle after warm up
**edit**
The ELD is built into the under hood fuse box sadly, I will try to find the flowchart for diagnosing the ELD is to verify if it is faulty or not but make no promises as of now...
The ELD is built into the under hood fuse box sadly, I will try to find the flowchart for diagnosing the ELD is to verify if it is faulty or not but make no promises as of now...
Last edited by Rice Petrol; Apr 23, 2009 at 04:23 PM.
Thread Starter
Junior Member
Joined: Jul 2006
Posts: 151
Likes: 0
From: San Jose, CA, USA
Re: Low Idle after warm up
Car isn't throw any kind of engine code. I cleaned the IAC today, still does the same thing.
Not exactly sure what a ELD is. More information on this?
Not exactly sure what a ELD is. More information on this?
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Honda-Tech Member
Joined: Nov 2008
Posts: 209
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From: Independence, KS, USA
Re: Low Idle after warm up
The idle system is relatively simple in operation. The basic idea is just to bypass the throttle plate and let more air in. The ECU and fuel injection system will automatically adjust the fuel mixture so that the end result is an increase in engine speed.
1. Let engine warm up completely.
2. Unplug the IAC. This is a two wire gadget on the drivers side front of the throttle chamber and pointing slightly down. If the IAC is functioning, you should get a drop in rpm. In a short period of time, you will also get a check engine light.
3. Make sure that the throttle cable allows the throttle plate to close completely. There should be a small amount of slack in the cable.
4. Adjust the RPM to about 500 rpm with the idle screw. (Inset screw on the top, passenger's side of the throttle body and facing the passenger wheel.
5. Plug the IAC back in. RPM should rise to about 830 for Auto tranny and 870 for Manual.
If the screw has no effect, it may be plugged with gunk. Same with the IAV and CAV. They all have little screens in them or they are small holes that build up with oil and dirt over time. I have heard that you can remove the idle screw and clean the passage way with a pipe cleaner.
1. Let engine warm up completely.
2. Unplug the IAC. This is a two wire gadget on the drivers side front of the throttle chamber and pointing slightly down. If the IAC is functioning, you should get a drop in rpm. In a short period of time, you will also get a check engine light.
3. Make sure that the throttle cable allows the throttle plate to close completely. There should be a small amount of slack in the cable.
4. Adjust the RPM to about 500 rpm with the idle screw. (Inset screw on the top, passenger's side of the throttle body and facing the passenger wheel.
5. Plug the IAC back in. RPM should rise to about 830 for Auto tranny and 870 for Manual.
If the screw has no effect, it may be plugged with gunk. Same with the IAV and CAV. They all have little screens in them or they are small holes that build up with oil and dirt over time. I have heard that you can remove the idle screw and clean the passage way with a pipe cleaner.
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