Why does my RPM jump up and down? - Honda-Tech


Why does my RPM jump up and down?

Reply
 
 
 
Thread Tools Search this Thread
Old 01-14-2010, 12:36 AM   #1
Honda-Tech Member
Thread Starter
 
niwisball3r's Avatar
 
Join Date: Jan 2009
Location: SoCal
Posts: 32
Icon6 Why does my RPM jump up and down?

Hi. So I recently got my first car and noticed as I'm in neutral going down hill the RPM would jump up and down and seems to stop as I'm braking and stop. What should I do? Oh I forgot to mention I have a 93 Civic HB VX D15Z1.

Thanks.
niwisball3r is offline   Reply With Quote
Old 01-14-2010, 12:56 AM   #2
Honda-Tech Member
 
97ej6dx's Avatar
 
Join Date: May 2008
Location: Mars Duuuuuude
Posts: 861
Default Re: Why does my RPM jump up and down?

it sounds like an IACV issue are there any check engine lights??
97ej6dx is offline   Reply With Quote
Old 01-14-2010, 01:19 AM   #3
Honda-Tech Member
 
iangon's Avatar
 
Join Date: Jul 2006
Location: Corralitos, ca, usa
Posts: 13
Default Re: Why does my RPM jump up and down?

yes I had this same problem when at idle on a d16 - it turned out to be the idle air control valve.
iangon is offline   Reply With Quote
Old 01-14-2010, 03:54 AM   #4
Honda-Tech Member
Thread Starter
 
niwisball3r's Avatar
 
Join Date: Jan 2009
Location: SoCal
Posts: 32
Default Re: Why does my RPM jump up and down?

No engine check light.

I'm very new to this so will this be an easy quick fix? What do I need to do to fix my IACV?

Thanks for the quick response.
niwisball3r is offline   Reply With Quote
Old 01-14-2010, 06:26 AM   #5
Honda-Tech Member
 
95_Civic_4dr's Avatar
 
Join Date: Jan 2009
Location: Cali
Posts: 273
Default Re: Why does my RPM jump up and down?

If it is the IACV, you can try cleaning it before replacing. Just follow this guide: http://www.honda-tech.com/showthread...+control+valve
Had to do this for my eg.
95_Civic_4dr is offline   Reply With Quote
Old 01-14-2010, 07:37 AM   #6
Honda-Tech Member
 
VI Boost's Avatar
 
Join Date: Jul 2004
Location: I Love Lamp, NJ, United States
Posts: 614
Default Re: Why does my RPM jump up and down?

IACV most likely, and on rare occasions it could also be the TPS but most likely your IACV needs to be cleaned.
VI Boost is offline   Reply With Quote
Old 01-14-2010, 07:41 AM   #7
Honda-Tech Member
 
Join Date: Feb 2008
Posts: 45,260
Default Re: Why does my RPM jump up and down?

Quote:
Originally Posted by niwisball3r View Post
No engine check light.
Does the CEL work?
Former User is offline   Reply With Quote
Old 01-14-2010, 08:12 AM   #8
Junior Member
 
Join Date: Sep 2008
Location: miami, fl, US
Posts: 47
Default Re: Why does my RPM jump up and down?

This happened to me too. But it was the speed sensor.
JDM_Dream is offline   Reply With Quote
Old 01-14-2010, 09:07 AM   #9
Honda-Tech Member
 
Join Date: Dec 2009
Posts: 67
Default Re: Why does my RPM jump up and down?

Quote:
Originally Posted by VI Boost View Post
IACV most likely, and on rare occasions it could also be the TPS but most likely your IACV needs to be cleaned.
bingo....
ultraplayer26 is offline   Reply With Quote
Old 01-14-2010, 12:14 PM   #10
Honda-Tech Member
Thread Starter
 
niwisball3r's Avatar
 
Join Date: Jan 2009
Location: SoCal
Posts: 32
Default Re: Why does my RPM jump up and down?

Quote:
Originally Posted by 95_Civic_4dr View Post
If it is the IACV, you can try cleaning it before replacing. Just follow this guide: http://www.honda-tech.com/showthread...+control+valve
Had to do this for my eg.
I'll give this a shot today and let you know how it goes. Once I clean the IACV and doesn't seem to do the job, does that mean I need to replace it?

Quote:
Originally Posted by VI Boost View Post
IACV most likely, and on rare occasions it could also be the TPS but most likely your IACV needs to be cleaned.
I'm very new to all this, so what is a TPS?

Quote:
Originally Posted by RonJ@HT View Post
Does the CEL work?
Yea. My wording was a little off to make it sound like the light wasn't working, but would the CEL turn on with my RPM problem?

Quote:
Originally Posted by JDM_Dream View Post
This happened to me too. But it was the speed sensor.
How'd you know it was your speed sensor?
niwisball3r is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
RPM needle bouncing up when accelerating lostsonta Acura Integra 18 09-03-2012 04:39 PM
RPM jumps at shifts akouznet Tech / Misc 8 06-15-2009 05:30 PM
idle problem....rpm jumps when engage on clutch sevenfc Honda Civic / Del Sol (1992 - 2000) 5 02-28-2009 12:55 PM
RPM needle jumping around Draven_Von Honda Prelude 4 08-01-2004 02:02 PM
jumping rpm need heelllppppp!! gsr urgonnalearn2 Tech / Misc 6 01-17-2004 10:42 PM


Tags
93, accord, brakes, car, civic, del, down, honda, idle, jump, jumping, jumps, move, rmps, rpm, rpms, sol

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -8. The time now is 02:40 PM.