High idle with clutch pedal out, normal idle when clutch pedal pushed in. - RX8Club.com



Reply
 
 
 
LinkBack Thread Tools Search this Thread Rate Thread
Old 08-10-2010, 04:48 PM   #1
Administrator
Thread Starter
 
zoom44's Avatar
 
Join Date: Jul 2002
Location: portland oregon
Posts: 21,705
High idle with clutch pedal out, normal idle when clutch pedal pushed in.

Ok so recently I have had a little bit of a hunting/surging idle while the car warms, if i push the clutch in it stops surging. Once it is at full operating temp. the idle remains high, about 1250 ON THE TACH. If I push the clutch pedal in it will drop to "normal", about 800 or so on the tach.

what do you think- should i be looking into a new clutch? or do I have a bad neutral switch?
zoom44 is offline   Reply With Quote
Old 08-11-2010, 09:45 PM   #2
I drive at Red Line.
iTrader: (1)
 
DocBeech's Avatar
 
Join Date: Jul 2010
Location: Dallas, TX
Posts: 2,137
With no engine codes? There is a lot of answers for that question. A Throttle body gasket leaking air? That wouldn't set off a code...
DocBeech is offline   Reply With Quote
Old 08-11-2010, 11:19 PM   #3
Administrator
Thread Starter
 
zoom44's Avatar
 
Join Date: Jul 2002
Location: portland oregon
Posts: 21,705
interesting.

more info. yesterday evening when i was out driving around for a bit (getting on it a bit more than usual as i was alone in the car) i didnt have the surging at all AND when i was at some lights the idle was NORMAL instead of high.

today it was half and half. the first half(ish) of driving around today it was high unless i put the clutch pedal in but later it was idling normally.
zoom44 is offline   Reply With Quote
Old 08-11-2010, 11:25 PM   #4
Grasshopper
iTrader: (1)
 
Jon316G's Avatar
 
Join Date: Dec 2006
Location: Cuyahoga Falls, OH
Posts: 6,775
Weird...
When you have these problems, can you still use Cruise Control?
This will eliminate the switch on the clutch pedal (not the interlock switch).

You can test the neutral switch if you like:
DIY: Test Neutral and Reverse Switch
Jon316G is online now   Reply With Quote
Old 08-13-2010, 02:50 AM   #5
I drive at Red Line.
iTrader: (1)
 
DocBeech's Avatar
 
Join Date: Jul 2010
Location: Dallas, TX
Posts: 2,137
Well other than a leaky throttle body gasket, there is the ecm option. Did you ever AP your ecm? There could be a computer glitch that has your idle running at warmup settings all the time.
DocBeech is offline   Reply With Quote
Old 08-13-2010, 01:57 PM   #6
The devil made me do it
iTrader: (1)
 
DeViLbOi's Avatar
 
Join Date: Jul 2007
Location: Colorado Springs, CO
Posts: 3,740
You sure you were in your 8 and not your Prius Zoom? :P
DeViLbOi is offline   Reply With Quote
Old 08-13-2010, 02:48 PM   #7
Administrator
Thread Starter
 
zoom44's Avatar
 
Join Date: Jul 2002
Location: portland oregon
Posts: 21,705
Quote:
Originally Posted by Jon316G View Post
Weird...
When you have these problems, can you still use Cruise Control?
This will eliminate the switch on the clutch pedal (not the interlock switch).

You can test the neutral switch if you like:
DIY: Test Neutral and Reverse Switch
cruise is fine

Quote:
Originally Posted by DocBeech View Post
Well other than a leaky throttle body gasket, there is the ecm option. Did you ever AP your ecm? There could be a computer glitch that has your idle running at warmup settings all the time.
no computer clitch

Quote:
Originally Posted by DeViLbOi View Post
You sure you were in your 8 and not your Prius Zoom? :P
i dont have aprius
zoom44 is offline   Reply With Quote
Old 08-13-2010, 04:27 PM   #8
Moderator Noir
iTrader: (4)
 
alnielsen's Avatar
 
Join Date: Aug 2004
Location: Buddhist Monastery, High Himalaya Mtns. of Tibet
Posts: 12,586
It sounds like the problem I have in the winter with the neutral switch. BTW, if you plan on replacing it, the size wrench is 27mm ($18 at Sears/Craftsman).
alnielsen is offline   Reply With Quote
Old 08-13-2010, 04:31 PM   #9
Administrator
Thread Starter
 
zoom44's Avatar
 
Join Date: Jul 2002
Location: portland oregon
Posts: 21,705
yeah im thinking so too. looks like ill have to borrow the neighbors jack stands
zoom44 is offline   Reply With Quote
Old 08-13-2010, 05:01 PM   #10
QUATTRO4LYFE
iTrader: (6)
 
shadycrew31's Avatar
 
Join Date: Apr 2008
Location: Burbs,PA
Posts: 6,249
I don't think the neutral switch would cause surging. That's just me though.

Page 68 in the FSM engine problem section has more info.
Measure voltages at PCM terminal 4w, 4z, 4f, 20.

If PCM terminal 4f voltage is not as specified inspect CPP switch

Page 281 of the engine details sections gives you instructions on how to test the CPP unit.

Good luck. Let us know what ya find yea?
shadycrew31 is offline   Reply With Quote
Old 08-13-2010, 05:25 PM   #11
Jedi Master
iTrader: (7)
 
Jedi54's Avatar
 
Join Date: Mar 2004
Location: The Dark Side
Posts: 20,697
neutral switch can cause surging in the idle, I had it happen and the tach kept bouncing around a few hundred rpm.

zoom: what's this about you borrowing your neighbor's jack stands. You don't have your own?! n00b.
Jedi54 is online now   Reply With Quote
Old 08-13-2010, 10:45 PM   #12
Administrator
Thread Starter
 
zoom44's Avatar
 
Join Date: Jul 2002
Location: portland oregon
Posts: 21,705
Quote:
Originally Posted by shadycrew31 View Post
I don't think the neutral switch would cause surging. That's just me though.
yeah it will. ive known it could for 4-5 year now.the pcm is basically "confused" about which map to use

Quote:
Originally Posted by Jedi54 View Post
zoom: what's this about you borrowing your neighbor's jack stands. You don't have your own?! n00b.
well he already owns them(he's rehabbing a vw bus), so.....he owns a lawn edger to ... kinda like buying wheels... i mean you already have the ones i want so.... ill just borrow yours
zoom44 is offline   Reply With Quote
Old 08-14-2010, 12:52 AM   #13
Cam
this space for rent
iTrader: (1)
 
Cam's Avatar
 
Join Date: Jan 2003
Location: Indy
Posts: 1,179
Quote:
Originally Posted by DocBeech View Post
With no engine codes? There is a lot of answers for that question. A Throttle body gasket leaking air? That wouldn't set off a code...
It would throw a lean AFR code.



Sounds like the neutral switch to me.


I had this problem you described for a few months. Sometimes would throw the code for the neutral safety switch, sometimes it wouldnt.
Cam is offline   Reply With Quote
Old 10-05-2011, 08:39 PM   #14
Phone Booth'd
iTrader: (4)
 
fuztupnz's Avatar
 
Join Date: May 2009
Location: Cincinnasty
Posts: 2,537
fuztupnz is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
REPLACE YOUR PURGE VALVE SOLENOID ASAP...Drives like new xAgyex Series I Trouble Shooting 8 03-13-2016 05:37 PM
Lots of oil/pressure in breather hose uZu New Member Forum 13 12-30-2015 01:35 PM
New Engine? Eirulisse New Member Forum 13 08-15-2015 01:34 PM
Getting hard to get into gears thewatcher101 Series I Trouble Shooting 3 08-04-2015 11:42 AM
clutch pedal engagement low yapakanichi Series I Trouble Shooting 4 07-21-2015 08:41 PM


Tags
1985, bad, clutch, gslse, high, idle, idling, mazda, normal, pedal, problems, pushed, released, rx7, surging

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Rate This Thread
Rate This Thread:

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 On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 01:17 PM.


All content Copyright 2007 by Internet Brands, Inc.