Honda Civic Performance - JDM Discussion Engine tech, forced induction, springs, shocks, brakes, tires, etc.

Civic Wont Start

Old 23-Apr-2007, 08:10 PM
  #1  
Registered User
Thread Starter
 
Join Date: Apr 2007
Posts: 25
Civic Wont Start

Hey, I have a 1991 Civic cx Hatch. In the summer time when its hot and its really sunny, or when i shut the car off to get gas or to go into a store, ill come out and try and start it and it will just rull over and wont start. It doesnt do it in the winter, just sunner, and doesnt do it EVERY time, just sometimes. When i baught the car it did it with the stock motor and i have installed a B16a and still does it. Iv talked to a Honda Tech and numerous mechanics and some say its the Fuel Driver Moduel. (Main Relay). If anyone has had the same problem and fixed it, or knows what im talking about and knows what the problem is, please let me know.

Thanks

e-mail/msn: [email protected]
cheesy is offline  
Old 23-Apr-2007, 09:40 PM
  #2  
Registered User
 
Join Date: Apr 2007
Posts: 954
Yup sounds like the main relay to me. If you are mechanically inclined you can attempt to fix it yourself, but I'd just purchase a new one.. or one from a wreckers
imported_chris_v2 is offline  
Old 23-Apr-2007, 09:48 PM
  #3  
Registered User
 
Join Date: Mar 2007
Posts: 532
just buy the relay from honda and save some time.. its an easy install!
imported_Kingjames1983 is offline  
Old 24-Apr-2007, 06:52 PM
  #4  
Senior Member
 
Join Date: May 2006
Location: Stoney Creek/Hamilton
Posts: 684
Coolant tem p sensor.


Car thinks its cold when its actually hot.

Floods the engine.
imported_rhd_ef is offline  
Old 24-Apr-2007, 06:53 PM
  #5  
Senior Member
 
Join Date: May 2006
Location: Stoney Creek/Hamilton
Posts: 684
I have a nice main relay, $20 installed
btw. They are like 100 at dealer
imported_rhd_ef is offline  
Old 24-Apr-2007, 10:44 PM
  #6  
Registered User
 
Join Date: Apr 2007
Posts: 954
if its the coolant temp sensor why you gona sell him a main relay?

I personally think its a mix of the o2 sensor and the rad fan. so replace the o2 sensor and wire the rad fan to always be on
imported_chris_v2 is offline  
Old 24-Apr-2007, 11:01 PM
  #7  
Registered User
Thread Starter
 
Join Date: Apr 2007
Posts: 25
i replaced the o2 sencers when i did the motor swap with brand new o2 sencers and it still did it. im leaning toward the main relay being the issue here. the fan kicks on when it is getting hot so y bother run the fan all the time and burn out when it works fine now. i also run cooland additive so there is no reason for the engine to be getting rediculasly hot.
cheesy is offline  
Old 25-Apr-2007, 05:25 PM
  #8  
Registered User
 
Join Date: Apr 2007
Posts: 954
i came room in a bad mood cause i got brake fluid all over me. And your post made me laugh. Thank you.

It is your main relay, take her out
imported_chris_v2 is offline  
Old 26-Apr-2007, 02:41 AM
  #9  
-- site donator --
iTrader: (2)
 
bbarbulo's Avatar
 
Join Date: Aug 2002
Location: not Toronto
Posts: 27,687
main relay - I've had the same issue in the past.
bbarbulo is offline  
Old 31-May-2007, 11:15 PM
  #10  
Registered User
Thread Starter
 
Join Date: Apr 2007
Posts: 25
where is the main relay located. whats inside the relay that would make my car not start?
cheesy is offline  
Old 01-Jun-2007, 12:22 AM
  #11  
-- site donator --
iTrader: (1)
 
Join Date: Mar 2004
Location: the hammer
Posts: 7,038
the main relay is near the in-car fuse panel, up under the dash there.
Its a very common problem with civics, the solder joints on the main relay are weak and all it usually takes is a hot day to make one not want to work. When this happens the main relay isn't giving power to the fuel pump, so the car won't run.
zeeman is offline  
Old 01-Jun-2007, 02:11 AM
  #12  
Registered User
 
imported_mikepasini's Avatar
 
Join Date: Apr 2005
Location: mississauga
Posts: 1,607
hahaha, my car just started again recently with this damn heat. it starts on like 2 cylinders then works its way up. only when its hot and the engine is still warm i would say.

everyones told me main relay, then it stopped in the fall... now its back, so time to do it...



20 installed you say?
imported_mikepasini is offline  
Old 01-Jun-2007, 04:52 PM
  #13  
Registered User
Thread Starter
 
Join Date: Apr 2007
Posts: 25
thanks for the help. when i install a new one, should i solder them to the relay. also will my car not start in the heat when its hot out or will it start up every time?
cheesy is offline  
Old 01-Jun-2007, 05:36 PM
  #14  
Registered User
 
Join Date: Mar 2007
Posts: 532
it should start up everytime when you put a new one in... and if you buy it from the dealer there is no soldering involved
imported_Kingjames1983 is offline  
Old 02-Jun-2007, 08:10 PM
  #15  
Registered User
 
imported_mikepasini's Avatar
 
Join Date: Apr 2005
Location: mississauga
Posts: 1,607
Originally posted by zeeman
the main relay is near the in-car fuse panel, up under the dash there.
Its a very common problem with civics, the solder joints on the main relay are weak and all it usually takes is a hot day to make one not want to work. When this happens the main relay isn't giving power to the fuel pump, so the car won't run.

i swear, sometimes when i go to start it, i swear i still hear the fuel pump prime and it must be getting a little gas, cause it kinda starts, seems like just not enough. will it sometimes prime?

im just trying to sort of if it might be from another problem or something.
imported_mikepasini is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jonny_sauce
Honda Civic Performance - JDM Discussion
12
30-Dec-2009 10:45 PM
bengali548
CFz Discussion
4
23-Feb-2009 06:02 AM
Phyreangel
Honda Civic Performance - JDM Discussion
22
16-Feb-2007 05:40 PM
Dominik
Honda Civic Performance - JDM Discussion
1
20-Jul-2006 12:53 PM
89 z6 civc
Honda Civic Performance - JDM Discussion
0
24-Mar-2006 12:33 AM


Thread Tools
Search this Thread
Quick Reply: Civic Wont Start


Contact Us - Sitemap - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.