idle drops and goes to normal?
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B*a*n*n*e*d
Joined: May 2004
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From: Huntington Beach / Carson, CA, USA
idle drops and goes to normal?
sometiems when i sit at a red light, i could see the idle go down to near 500 and go back up, there is a TINY TINY vibration. i checked voltage on battery and its stable, and the dizzy has been changed about 1000 miles ago. the plugs are new. what can cause this problem? and sometimes when i start my car, the rpm woulnt jump instead it would go up from 0 to normal slowly. why is this? TIA
98 ls
98 ls
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Joined: Sep 2002
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From: San Diego, CA, US of A
Re: idle drops and goes to normal? (sinfulGSR)
mine does it too... But I notice its only when I am at a light or got the stereo up loud. I believe its eletrical. If you let off the brakes when this happens, Idle should return to normal.
Re: idle drops and goes to normal? (IMMORTAL-B18)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IMMORTAL-B18 »</TD></TR><TR><TD CLASS="quote">If you let off the brakes when this happens, Idle should return to normal. </TD></TR></TABLE>
i noticed mine returns to normal when i turn on my headlights...
i noticed mine returns to normal when i turn on my headlights...
Junior Member
Joined: Apr 2004
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From: Chicagoland, IL, U.S.A.
Re: idle drops and goes to normal? (Stock_LS)
Also check to make sure you don't have any vacuum leaks at any of the hoses, and also check to make sure your PCV valve is clean and functioning. The up and down surging could be caused by just enough vacuum building up and then when it becomes overbearing on wherever it could be leaking, it comes out.
Junior Member
Joined: Apr 2004
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From: Christchurch, New Zealand
Re: idle drops and goes to normal? (C. FujiMoto)
Sitting at a red light.... do you have your breaks on? engaging the brakes drains power, therefore reducing idle. Same thing happens if your stereo is up loud etc.
Joined: Dec 2001
Posts: 781
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From: Southern, California
Re: idle drops and goes to normal? (xDA9x)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Stock_LS »</TD></TR><TR><TD CLASS="quote">wet or moisty....!!! </TD></TR></TABLE>
hehe....moisty
anyways, my em1 would do they same and i reset the base idle, and all has been good so far.
hehe....moisty
anyways, my em1 would do they same and i reset the base idle, and all has been good so far.
Honda-Tech Member
Joined: Mar 2004
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From: Rain City, Wa, usa
It says in my service manual that after you disconnect the ECU or power to make sure that you hold the motor at a constant 3k rpm for like 2 min. to reset the idle. I had to do this after i swapped my motor.....
Honda-Tech Member
Joined: Jul 2002
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From: Mrs. Sauga, Ontario, Canada
Re: idle drops and goes to normal? (C. FujiMoto)
Most likely not ignition, I would guess at a dirty throttle body. Throttle plate is not suppose to close completely, suppose to be a hair line opening around the bore and plate. If this is gummed up with carbon it will result in a low idle. Putting load on the engine (running AC or high draw device) will trigger the ECU to open the IAC valve and increase the idle. Clean the throttle plate and throttle bore with some carb/throttle body cleaner. Also clean the IAC valve while you're at it.
Thread Starter
B*a*n*n*e*d
Joined: May 2004
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From: Huntington Beach / Carson, CA, USA
Re: idle drops and goes to normal? (stumpyf4)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by stumpyf4 »</TD></TR><TR><TD CLASS="quote">Most likely not ignition, I would guess at a dirty throttle body. Throttle plate is not suppose to close completely, suppose to be a hair line opening around the bore and plate. If this is gummed up with carbon it will result in a low idle. Putting load on the engine (running AC or high draw device) will trigger the ECU to open the IAC valve and increase the idle. Clean the throttle plate and throttle bore with some carb/throttle body cleaner. Also clean the IAC valve while you're at it.</TD></TR></TABLE>
how do i clean the throttle plate and bore?
how do i clean the throttle plate and bore?
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From: ainrofilac, Anti Stickers
Re: idle drops and goes to normal? (C. FujiMoto)
same **** happens to me.. i replaced my dist cap and rotor but it looks like that wasn't it.. maybe alternator?
Thread Starter
B*a*n*n*e*d
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From: Huntington Beach / Carson, CA, USA
Re: idle drops and goes to normal? (kendogg)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kendogg »</TD></TR><TR><TD CLASS="quote">same **** happens to me.. i replaced my dist cap and rotor but it looks like that wasn't it.. maybe alternator?</TD></TR></TABLE>
i dont think it could be caused by the alternator. if it was, wouldnt the battery voltage go up and down? i put a digital voltmeter on the battery to test it, and it was stable @ 14 or was it 12?
i dont think it could be caused by the alternator. if it was, wouldnt the battery voltage go up and down? i put a digital voltmeter on the battery to test it, and it was stable @ 14 or was it 12?