constant high idle problem... - HondaClub.com

805EG9 · 07-09-2008, 01:10 PM

I have an 89 crx hf, and the other day I got bored and decided to clean the throttle body. So, I disconnected everything and pulled the throttle body off, I sprayed it off with some STP throttle body cleaner, wiped it down, and let it dry. I put it back on, and connected everything, when I was done I started the car and it was Idling at about 2100 RPMs, I let it warm up and it went down to about 1800 RPMs... and it hasn't gone down any more since then. I thought it might have been that the throttle body was stuck open, but it's not. It still revs up and all, it just doesn't idle at what it should... before I cleaned it, it had a slightly higher than normal idle, but now it's ridiculous. I can't figure out what it is. I've even been consulting the chilton's manual for the car and I still can't figure it out... Am I just an idiot? Is it possible the answers right in front of my face, and I'm just looking right past it? Did I maybe get a vacuum line backwards or something? I can't figure this one out

. Any possible help is greatly appreciated. If you guy's have any other questions feel free to ask...

**PrimeTimeV6** · 07-09-2008, 01:25 PM

By you cleaning it its actually idleing correctly. When you had a higher idle before was b/c the gunk build up was holding the butterfly open more. Don't worry about it bro. You actually made it better

**8695Beaters** · 07-09-2008, 01:27 PM

I agree. You might try resetting the ECU to help it relearn how much air is coming in (disconnect the bayttery fro 10 minutes and then drive around for a few blocks normally to update the settings).

**splink48** · 07-09-2008, 03:07 PM

Yup, it normally takes 30-45 drive cycles for the ecu to relearn itself. Try looking up the "ECU resetting" article on this forum. That will tell you how to manually reset your ecu and save some time. Keep in mind that when you do this, you will still have some funky settings for a while until the ecu relearns everything.

marcos · 07-09-2008, 06:27 PM

ecu resetting is something that is done over night to be easy
just disconnect the battery and leave it off for up to 9 hours I think thats how long

and then connect the battery back
and yea a lot of hours
thats why I say just leave it over night

**PrimeTimeV6** · 07-09-2008, 07:34 PM

To do it in 15 seconds disconnect your negative cable and hold it against the positive.

marcos · 07-09-2008, 10:46 PM

wouldn't that make a whole bunch of sparks?
or do you mean with the battery off

**PrimeTimeV6** · 07-10-2008, 12:30 AM

no, b/c you remove the negative terminal and touch it to the positive. So basically the battery is totally disconnected and then both terminals will be touching the positive. It clears your ECU rather quickly without sparks.

805EG9 · 07-10-2008, 10:55 AM

Hmm... aight, thanks guys. I'm gonna go try to reset my ECU in a minute then... I'll let you know if anything catastrophic happens j/k... kind of.

marcos · 07-10-2008, 12:04 PM

thanks prime I didnt know that

07-09-2008, 01:10 PM	#1 (permalink)
805EG9 Member Join Date: May 2007 Location: So Cal, California United States Posts: 39	constant high idle problem... I have an 89 crx hf, and the other day I got bored and decided to clean the throttle body. So, I disconnected everything and pulled the throttle body off, I sprayed it off with some STP throttle body cleaner, wiped it down, and let it dry. I put it back on, and connected everything, when I was done I started the car and it was Idling at about 2100 RPMs, I let it warm up and it went down to about 1800 RPMs... and it hasn't gone down any more since then. I thought it might have been that the throttle body was stuck open, but it's not. It still revs up and all, it just doesn't idle at what it should... before I cleaned it, it had a slightly higher than normal idle, but now it's ridiculous. I can't figure out what it is. I've even been consulting the chilton's manual for the car and I still can't figure it out... Am I just an idiot? Is it possible the answers right in front of my face, and I'm just looking right past it? Did I maybe get a vacuum line backwards or something? I can't figure this one out. Any possible help is greatly appreciated. If you guy's have any other questions feel free to ask...

07-09-2008, 01:25 PM	#2 (permalink)
PrimeTimeV6 Built Not Bought! Join Date: Oct 2007 Location: New Iberia, Louisiana United States Posts: 2,484	By you cleaning it its actually idleing correctly. When you had a higher idle before was b/c the gunk build up was holding the butterfly open more. Don't worry about it bro. You actually made it better __________________ Personal....www.myspace.com/brandonkupihea HondaClub....www.myspace.com/hondaclubdotcom PrimeTimePerformance....www.myspace.com/primetimeperformance

07-09-2008, 01:27 PM	#3 (permalink)
8695Beaters LaY1n D0wN s1K BeATz Join Date: Sep 2007 Location: Wilmington, Delaware United States Posts: 2,976	I agree. You might try resetting the ECU to help it relearn how much air is coming in (disconnect the bayttery fro 10 minutes and then drive around for a few blocks normally to update the settings). __________________ Project Sil-E: The New Black If you give a man a fish, you feed him for a day. If you teach a man to fish, you feed him for life. If you're asking questions, make sure the first is "Have I used Google yet?" Hondaclub Facebook: http://www.facebook.com/group.php?gid=30849013673

07-09-2008, 03:07 PM	#4 (permalink)
splink48 The Sky Was Gold....... Join Date: Jun 2008 Location: The dirty durty, Georgia United States Posts: 1,392	Yup, it normally takes 30-45 drive cycles for the ecu to relearn itself. Try looking up the "ECU resetting" article on this forum. That will tell you how to manually reset your ecu and save some time. Keep in mind that when you do this, you will still have some funky settings for a while until the ecu relearns everything. __________________ 2004 Civic EX Coupe ATX 1985 CRX HF MTX Jeep is for SALE!!!! $6900 obo PM Me!

07-09-2008, 07:34 PM	#6 (permalink)
PrimeTimeV6 Built Not Bought! Join Date: Oct 2007 Location: New Iberia, Louisiana United States Posts: 2,484	To do it in 15 seconds disconnect your negative cable and hold it against the positive. __________________ Personal....www.myspace.com/brandonkupihea HondaClub....www.myspace.com/hondaclubdotcom PrimeTimePerformance....www.myspace.com/primetimeperformance

07-09-2008, 06:27 PM	#5 (permalink)
marcos oh **** honda!! Join Date: Oct 2007 Location: lincoln, Nebraska United States Posts: 572	ecu resetting is something that is done over night to be easy just disconnect the battery and leave it off for up to 9 hours I think thats how long and then connect the battery back and yea a lot of hours thats why I say just leave it over night

07-09-2008, 10:46 PM	#7 (permalink)
marcos oh **** honda!! Join Date: Oct 2007 Location: lincoln, Nebraska United States Posts: 572	wouldn't that make a whole bunch of sparks? or do you mean with the battery off

07-10-2008, 12:30 AM	#8 (permalink)
PrimeTimeV6 Built Not Bought! Join Date: Oct 2007 Location: New Iberia, Louisiana United States Posts: 2,484	no, b/c you remove the negative terminal and touch it to the positive. So basically the battery is totally disconnected and then both terminals will be touching the positive. It clears your ECU rather quickly without sparks. __________________ Personal....www.myspace.com/brandonkupihea HondaClub....www.myspace.com/hondaclubdotcom PrimeTimePerformance....www.myspace.com/primetimeperformance

07-10-2008, 10:55 AM	#9 (permalink)
805EG9 Member Join Date: May 2007 Location: So Cal, California United States Posts: 39	Hmm... aight, thanks guys. I'm gonna go try to reset my ECU in a minute then... I'll let you know if anything catastrophic happens j/k... kind of.

07-10-2008, 12:04 PM	#10 (permalink)
marcos oh **** honda!! Join Date: Oct 2007 Location: lincoln, Nebraska United States Posts: 572	thanks prime I didnt know that

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