1st Gen General Discussion The place for non-technical discussion about 1st Gen RX-7s or if there's no better place for your topic

84 Rx7 GSLSE

Thread Tools
 
Search this Thread
 
Old Aug 16, 2018 | 06:26 PM
  #1  
cronoz78's Avatar
Thread Starter
Junior Member
 
Joined: Aug 2018
Posts: 8
Likes: 0
From: Ontario
84 Rx7 GSLSE

New to the forum.
I have a problem of a bouncing idle. Watch the video .
Basically once it warms up it drops and bounces until you put your foot on the clutch, then it goes up to 1100 rpm

This seems to happened after replacement of the clutch master and slave. I also was messing around and cleaning under the hood. Everything seems to be intact. The BAC has been removed and cleaned and it works . The butterflys are clean and free gunk. I checked for vacuum lines they all seem ok . Opened connectors and cleaned them...

Any ideas?
Attached Files
File Type: wmv
20180816_181104_1.wmv (966.7 KB, 24 views)
Reply
Old Aug 16, 2018 | 06:37 PM
  #2  
Richard Miller's Avatar
Damn, it did start!
Tenured Member: 25 Years
Liked
Loved
Community Favorite
 
Joined: Feb 2001
Posts: 2,771
Likes: 470
From: washington
a .wmv file?
Reply
Old Aug 16, 2018 | 06:39 PM
  #3  
cronoz78's Avatar
Thread Starter
Junior Member
 
Joined: Aug 2018
Posts: 8
Likes: 0
From: Ontario
Windows media player file, yes.
Reply
Old Aug 16, 2018 | 07:01 PM
  #4  
cronoz78's Avatar
Thread Starter
Junior Member
 
Joined: Aug 2018
Posts: 8
Likes: 0
From: Ontario
Update:
unplugged the clutch pedal switch and now pushing the clutch does nothing to hold the idle steady. Rpm just bounce continuously
Reply
Old Aug 16, 2018 | 07:57 PM
  #5  
GSLSEforme's Avatar
ancient wizard...
Tenured Member 05 Years
 
Joined: Sep 2014
Posts: 2,335
Likes: 262
From: Maryland
For testing purposes,unplug BAC solenoid(black plug) while idling and post back what happens.
Reply
Old Aug 17, 2018 | 05:35 AM
  #6  
mazdaverx713b's Avatar
Have RX-7, will restore
Veteran: Army
Tenured Member: 20 Years
Loved
Community Favorite
iTrader: (91)
 
Joined: Oct 2003
Posts: 22,581
Likes: 1,273
From: Ohio
Have you adjusted the throttle position sensor to make sure it was in spec? The clutch switch that you unplugged is a cruise control cancel switch. Have you checked to make sure the cruise control cable is not binding or holding the throttle open slightly? Its one more thing to look into.
Reply
Old Aug 17, 2018 | 10:51 AM
  #7  
cronoz78's Avatar
Thread Starter
Junior Member
 
Joined: Aug 2018
Posts: 8
Likes: 0
From: Ontario
GSLSEforme
No change still bouncing
Reply
Old Aug 17, 2018 | 10:53 AM
  #8  
cronoz78's Avatar
Thread Starter
Junior Member
 
Joined: Aug 2018
Posts: 8
Likes: 0
From: Ontario
Originally Posted by mazdaverx713b
Have you adjusted the throttle position sensor to make sure it was in spec? The clutch switch that you unplugged is a cruise control cancel switch. Have you checked to make sure the cruise control cable is not binding or holding the throttle open slightly? Its one more thing to look into.
I haven't adjusted any sensors yet as the car was running fine before.
Reply
Old Aug 20, 2018 | 05:41 AM
  #9  
mazdaverx713b's Avatar
Have RX-7, will restore
Veteran: Army
Tenured Member: 20 Years
Loved
Community Favorite
iTrader: (91)
 
Joined: Oct 2003
Posts: 22,581
Likes: 1,273
From: Ohio
I would at least check the tps to ensure its in spec. I've had to adjust it in previous GSL-SE's that I've owned on occasion. Are you positive that there are not any vacuum lines that were knocked loose or any connectors that are not seated properly? Did you check to make sure the throttle cable and cruise control cables are seated properly?
Reply
Old Aug 20, 2018 | 11:32 AM
  #10  
cronoz78's Avatar
Thread Starter
Junior Member
 
Joined: Aug 2018
Posts: 8
Likes: 0
From: Ontario
I will check the tps and cables once I get back from NYC in a few days. I need a break from this lol.
Reply
Old Aug 20, 2018 | 11:13 PM
  #11  
Boriquaguerrero's Avatar
Retired First Sergeant
Veteran: Army
Tenured Member: 15 Years
Liked
Loved
iTrader: (18)
 
Joined: Jul 2007
Posts: 1,087
Likes: 69
From: Fort Stewart, GA
Reply
Old Aug 27, 2018 | 04:15 PM
  #12  
cronoz78's Avatar
Thread Starter
Junior Member
 
Joined: Aug 2018
Posts: 8
Likes: 0
From: Ontario
Back.
Boriquaguerrero: Yes I have this and following it.
mazdaverx713b: Yes TPS checks out. Im looking for hoses cracked or loose or not connected. Although I found the air pump belt is loose but this would have been loose when the car was ok as well so I dont see this as the problem.

Drove the car today on the highway with no problems or hesitation. Drives ok. Only occurs when at idle, I had to verify.
Reply
Old Aug 28, 2018 | 08:53 PM
  #13  
cronoz78's Avatar
Thread Starter
Junior Member
 
Joined: Aug 2018
Posts: 8
Likes: 0
From: Ontario
Good news
I was reading this post and it made sense since everything was working before. I remember the PO had said something about having to adjust idle but I never paid attention .
​​​​​​I did clean the butterflys. Anyways I lowered the idle down to 875. No more bounce. So what he must have done was raise idle but NOT cleaned the butterflys. Anyways I appreciate the help ! Tks.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Gregs
1st Generation Specific (1979-1985)
20
Mar 24, 2005 09:39 PM
rxgen1
1st Generation Specific (1979-1985)
8
Jun 1, 2004 10:32 PM
gev09
1st Generation Specific (1979-1985)
8
Apr 10, 2002 05:45 PM




All times are GMT -5. The time now is 02:09 PM.