2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Have to hold gas on cold start?

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Old Jan 24, 2010 | 10:22 PM
  #1  
young Dizzy's Avatar
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1987 Rx7 Turbo2
 
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From: Upper Darby
Have to hold gas on cold start?

When starting my turbo 2 i have to hold my foot on the gas to keep the car on untill it gets warm then its fine. Does any bodi eles have to do this or any bodi no where to look towards fixing this?
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Old Jan 24, 2010 | 10:26 PM
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RotaryEvolution's Avatar
Sharp Claws
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From: Central Florida
was the throttle body modified?
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Old Jan 24, 2010 | 10:26 PM
  #3  
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From: eb Jersey
it sounds like someone disabled the cold start system
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Old Jan 24, 2010 | 10:45 PM
  #4  
Amur_'s Avatar
Refined Valley Dude
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From: Kitchener, Ontario (Hamilton's armpit)
Does the car rev to 3000 rpm after it first starts?

It sounds like you're missing some or all of the thermowax. You can see pictures of it on this page:

http://fc3spro.com/TECH/HOWTO/TBM/tbm.html

It sits behind the throttle body.


Originally Posted by manslayerx9
it sounds like someone disabled the cold start system
The Cold Start Assist is just for cranking; it spits a little coolant into both chambers to lubricate them so that the rotors spin more easily in colder temps. The consensus is that after 2 decades this system probably isn't working on most of the RX-7s out there.


[edit] More info: https://www.rx7club.com/2nd-generation-specific-1986-1992-17/need-some-tutoring-cold-idle-assist-thermowax-865595/
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Old Jan 25, 2010 | 12:50 PM
  #5  
young Dizzy's Avatar
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1987 Rx7 Turbo2
 
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From: Upper Darby
Well i know my cold start not hooked up lotz of ppl told me that i didnt need it so i never bothered fixing it. The throttle body was not modded either, I get in crank the car and it starts first time every time jumps up to 2500 i guess then bogs out unless i give it gas. It keep doing this untill warm
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Old Jan 25, 2010 | 01:05 PM
  #6  
RotaryEvolution's Avatar
Sharp Claws
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From: Central Florida
referring to the thermowax, you have to list if anything else was modified such as the coolant lines to and from the throttle body.

not hooking everything up as it originally was = modified by the way.
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