Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

prelude rpms drop when I tap throttle

Thread Tools
 
Search this Thread
 
Old Feb 9, 2009 | 04:20 PM
  #1  
butter99's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Dec 2005
Posts: 467
Likes: 0
From: Nor-Cal, CA, USA
Default prelude rpms drop when I tap throttle

Why would my prelude rpms drop when I tap the throttle?
Reply
Old Feb 9, 2009 | 05:09 PM
  #2  
butter99's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Dec 2005
Posts: 467
Likes: 0
From: Nor-Cal, CA, USA
Default Re: prelude rpms drop when I tap throttle

bump
Reply
Old Feb 9, 2009 | 05:12 PM
  #3  
JKov240's Avatar
Honda-Tech Member
 
Joined: May 2006
Posts: 1,783
Likes: 1
From: TX, USA
Default Re: prelude rpms drop when I tap throttle

You'd probably have better luck in the Prelude section...unless of course you're saying you have a H22 in your Civic, but details help.
Reply
Old Feb 9, 2009 | 05:27 PM
  #4  
97D16Y7's Avatar
Junior Member
 
Joined: Feb 2009
Posts: 32
Likes: 0
From: Havertown, PA 2 mins from Philly son.
Default Re: prelude rpms drop when I tap throttle

my works 96 ford van does that...got any codes thrown your way? we had 2 but i dont think it what is making it do that. maybe we have the same problem lol
Reply
Old Feb 9, 2009 | 06:21 PM
  #5  
butter99's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Dec 2005
Posts: 467
Likes: 0
From: Nor-Cal, CA, USA
Default Re: prelude rpms drop when I tap throttle

95 civic H22a. Its like I run lean when I tap the gas peddle. The rpms will drop and its just wrong. No codes at the moment, but I have a jdm ecu in right now. I'll stick a domestic ecu in and look for a code too.

It revs perfect all the way to 7k., but rpms drop when I tap on gas from idle.

still looking for ideas..
Reply
Old Feb 9, 2009 | 06:30 PM
  #6  
bossm's Avatar
Honda-Tech Member
 
Joined: Jun 2007
Posts: 629
Likes: 0
From: tampa, fl, usa
Default Re: prelude rpms drop when I tap throttle

i have the same problem in my em1 whe i tap the gas my idle will drop to 500-600 and then raise again to 900-950
Reply
Old Feb 9, 2009 | 06:42 PM
  #7  
butter99's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Dec 2005
Posts: 467
Likes: 0
From: Nor-Cal, CA, USA
Default Re: prelude rpms drop when I tap throttle

really? hmm and you have been driving it that way? I really want to take care of it this week. Maybe my tps sensor needs to be adjusted or not.

Have you checked/replaced anything yet?

I just put my cylinder head back on after having the seats fixed. I took the intake and exhaust manifolds off. Now I'm having this problem So Its there somewheres.
Reply
Old Feb 9, 2009 | 06:46 PM
  #8  
bossm's Avatar
Honda-Tech Member
 
Joined: Jun 2007
Posts: 629
Likes: 0
From: tampa, fl, usa
Default Re: prelude rpms drop when I tap throttle

yes i mean the car runs better than new i never have any problems with it really but when i just tap it for a quick millisecond it drops rpms for a sec and then go right back to perfect idle
Reply
Old Feb 9, 2009 | 06:48 PM
  #9  
butter99's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Dec 2005
Posts: 467
Likes: 0
From: Nor-Cal, CA, USA
Default Re: prelude rpms drop when I tap throttle

Ya thats my problem too
Reply
Old Feb 9, 2009 | 06:49 PM
  #10  
bossm's Avatar
Honda-Tech Member
 
Joined: Jun 2007
Posts: 629
Likes: 0
From: tampa, fl, usa
Default Re: prelude rpms drop when I tap throttle

well come on someone that fixed it before let us know the answer
Reply
Old Feb 9, 2009 | 06:59 PM
  #11  
butter99's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Dec 2005
Posts: 467
Likes: 0
From: Nor-Cal, CA, USA
Default Re: prelude rpms drop when I tap throttle

bump for ideas
Reply
Old Feb 9, 2009 | 07:20 PM
  #12  
butter99's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Dec 2005
Posts: 467
Likes: 0
From: Nor-Cal, CA, USA
Default Re: prelude rpms drop when I tap throttle

bump
Reply
Old Feb 9, 2009 | 07:28 PM
  #13  
butter99's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Dec 2005
Posts: 467
Likes: 0
From: Nor-Cal, CA, USA
Default Re: prelude rpms drop when I tap throttle

bump
Reply
Old Feb 9, 2009 | 07:41 PM
  #14  
butter99's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Dec 2005
Posts: 467
Likes: 0
From: Nor-Cal, CA, USA
Default Re: prelude rpms drop when I tap throttle

bump
Reply
Old Feb 9, 2009 | 07:51 PM
  #15  
butter99's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Dec 2005
Posts: 467
Likes: 0
From: Nor-Cal, CA, USA
Default Re: prelude rpms drop when I tap throttle

bump for ideas
Reply
Old Feb 9, 2009 | 08:04 PM
  #16  
TheJGB3's Avatar
Honda-Tech Member
 
Joined: Nov 2007
Posts: 982
Likes: 1
From: Lake Wylie, SC, USA
Default Re: prelude rpms drop when I tap throttle

I wouldn't worry about it.
Reply
Old Feb 9, 2009 | 08:44 PM
  #17  
butter99's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Dec 2005
Posts: 467
Likes: 0
From: Nor-Cal, CA, USA
Default Re: prelude rpms drop when I tap throttle

I think I will play with the screw on the throttle cable. Other then that I have no idea. I'll look extra hard for a vacuum leak or what not. I'm gonna put my air boost valve plate back on.
Reply
Old Feb 10, 2009 | 01:24 AM
  #18  
Louie's Avatar
What would Chente do?
 
Joined: Nov 2000
Posts: 2,934
Likes: 0
From: socali
Default Re: prelude rpms drop when I tap throttle

might be normal...

my ITR would do the same thing. You're at idle and you give the throttle a quick stab, no to the floor, just enough to make a difference and the rpm needle dips then raises?

if so it's due to the large t-body/plenum volume and i wouldn't worry about it.
Reply
Old Feb 10, 2009 | 08:43 PM
  #19  
butter99's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Dec 2005
Posts: 467
Likes: 0
From: Nor-Cal, CA, USA
Default Re: prelude rpms drop when I tap throttle

Ya I think its just an ineficient old engine. I had a really bad dip. But I messed with somthing and it stopped.. I had a Tiny vacuum leak or messed with the cable or somthing.

I did turn the screws on the cable to raise the idle rpm. So when I was idling at about 1800-2200 I had no dip in the rpm/power. I belive its too quick for the computer to compensate for... I'm not worried anymore.

thx for the ideas.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jgouds
Honda Prelude
12
Jun 24, 2013 12:47 PM
avargas28
Honda Prelude
4
May 27, 2009 12:22 PM
robbieshonda
Honda Prelude
3
Feb 2, 2007 02:55 PM
Turck
Honda Prelude
5
Oct 31, 2004 08:18 AM




All times are GMT -8. The time now is 05:43 AM.