New Member RX-7 Technical Post your first technical questions here, in an easy flame free environment, before jumping into the main technical sections.

Cold start up

Thread Tools
 
Search this Thread
 
Old 07-20-12, 10:37 PM
  #1  
Junior Member
Thread Starter
 
FcManny's Avatar
 
Join Date: May 2012
Location: Monctclair Ca
Posts: 28
Likes: 0
Received 0 Likes on 0 Posts
Cold start up

My fc revs up to around 4k on start up, and I know it's the cold start up system but is it necessary,? If not how would I get rid of it?
Old 07-22-12, 10:49 AM
  #2  
Engine, Not Motor

iTrader: (1)
 
Aaron Cake's Avatar
 
Join Date: Feb 2001
Location: London, Ontario, Canada
Posts: 29,789
Likes: 0
Received 108 Likes on 91 Posts
You can disable it by jumpering the cold start switch, which is located in the bottom driver side of the radiator. Just unplug, and jumper the two wires.

Or simply start the car in gear. The ECU disables the 3K startup in that case.
Old 08-02-12, 03:01 AM
  #3  
Junior Member
Thread Starter
 
FcManny's Avatar
 
Join Date: May 2012
Location: Monctclair Ca
Posts: 28
Likes: 0
Received 0 Likes on 0 Posts
I have eliminated cold start, thanks a lot buddy!
Old 08-02-12, 08:25 AM
  #4  
Junior Member

 
rx-driver's Avatar
 
Join Date: Dec 2005
Location: Denmark
Posts: 11
Likes: 0
Received 0 Likes on 0 Posts
Is it bad for the car to do this? I mean, it must be there for a reason, right?
Old 08-02-12, 08:39 AM
  #5  
Moderator

iTrader: (1)
 
satch's Avatar
 
Join Date: Jun 2005
Location: tulsa,ok.
Posts: 11,738
Received 12 Likes on 11 Posts
Originally Posted by rx-driver
Is it bad for the car to do this? I mean, it must be there for a reason, right?
It's there to warm up the cats so the car passes U.S. emissions standards. And jumpering the two wires at the plug does not disengage the cold start functionality unless I am gravely mistaken.

The sensor will create continuity inside itself when the coolant temp is above a certain threshold which is close to 60 degrees Farenheit. When this occurs the continuity in the sensor/switch will pass the ground from one wire to the other wire, which runs to the ECU. When the ECU receives the ground it thinks the coolant temp is warm enough to initiate the cold start process. So if you don't want this then you would simply remove the plug to the temp switch and leave it be.
Old 08-02-12, 10:15 AM
  #6  
Banned. I got OWNED!!!
iTrader: (2)
 
RTRY_STR's Avatar
 
Join Date: Aug 2012
Location: SoCal
Posts: 17
Likes: 0
Received 0 Likes on 0 Posts
did it to my FC (removal of cold start) just have to hold the pedal down a bit til warm... no big deal.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
whinin
Introduce yourself
17
03-30-19 07:53 PM
sherff
Adaptronic Engine Mgmt - AUS
5
09-12-15 12:22 PM
rx7shirley
2nd Generation Specific (1986-1992)
6
09-02-15 02:11 PM



Quick Reply: Cold start up



All times are GMT -5. The time now is 11:47 AM.