The Subaru SVX World Network   SVX Network Forums
Live Chat!
SVX or Subaru Links
Old Lockers
Photo Post
How-To Documents
Message Archive
SVX Shop Search
IRC users:

Go Back   The Subaru SVX World Network > SVX Main Forums > Technical Q & A

Reply
 
Thread Tools Display Modes
  #1  
Old 04-18-2006, 12:50 PM
Hocrest's Avatar
Hocrest Hocrest is offline
Freezepop's are Awesome!!!!
Subaru Silver Contributor
 
Join Date: Oct 2003
Location: Pittston, PA
Posts: 5,334
Send a message via AIM to Hocrest
Coolant Temp Sensor???

There's been a slight issue lately with the racer. When the engine is cold, it starts fine. And, when the engine is hot, it starts fine. But when it is warm, like after sitting for 20-30 minutes it cranks and cranks but won't start, smells real rich.

We're thinking it's the Coolant Temp Sensor?? Would the SSM verify this??? Is anyone bringing either of their two SSM's to Reading ( Tom???)
__________________
Dave
- 03 Baja - 92 SVX - 86 Brat - 08 OB 3.0
Reply With Quote
  #2  
Old 04-18-2006, 12:56 PM
TomsSVX's Avatar
TomsSVX TomsSVX is offline
Maniac modifier
 
Join Date: Dec 2003
Location: Branchburg, New Jersey
Posts: 15,489
Registered SVX Classic SVX
I'll bring an extra temp sensor 4 you guys!!!

Tom
Reply With Quote
  #3  
Old 04-18-2006, 01:07 PM
Earthworm's Avatar
Earthworm Earthworm is offline
Meow!
 
Join Date: Mar 2002
Location: Winnipeg, Manitoba
Posts: 11,957
Send a message via ICQ to Earthworm Send a message via AIM to Earthworm Send a message via MSN to Earthworm Send a message via Yahoo to Earthworm Send a message via Skype™ to Earthworm
My experience showed the sensor to only affect cold starts.

Any codes after the cranking? Possibly crank/cam sensor?
Reply With Quote
  #4  
Old 04-18-2006, 02:11 PM
Manarius's Avatar
Manarius Manarius is offline
1995 Subaru SVX LSi Polo Green
 
Join Date: Jul 2005
Location: Grantham, PA (Near Harrisburg)
Posts: 2,119
Send a message via ICQ to Manarius Send a message via AIM to Manarius Send a message via MSN to Manarius Send a message via Yahoo to Manarius Send a message via Skype™ to Manarius
Registered SVX
Coolant Temp Sensor almost always affects warm engines.
__________________
-Jason
(8/23/07-Present) 1995 Subaru SVX LSi (197k) Polo Green (#1102) 03/95
Mods: DDM Tuning 4500k 35w Low Beam HID, 100w H3 Bulbs, Extra Ground Cables, 15 minute $12.96 mod,
svxfiles designed transmission mount (), sporting a "new" tail light bar,
silver BBS rims, custom power steering cooler (one that doesn't dump ATF constantly), new negative lead cable, no more third or fourth gear
(1977-Present) 1977 Chevrolet Corvette (81k) Silver
(12/01/2011-Present) 2005 Subaru Outback 2.5i Limited 5MT (97k)
I have a bad feeling about this.
-Obi Wan Kenobi
Reply With Quote
  #5  
Old 04-18-2006, 02:25 PM
Earthworm's Avatar
Earthworm Earthworm is offline
Meow!
 
Join Date: Mar 2002
Location: Winnipeg, Manitoba
Posts: 11,957
Send a message via ICQ to Earthworm Send a message via AIM to Earthworm Send a message via MSN to Earthworm Send a message via Yahoo to Earthworm Send a message via Skype™ to Earthworm
Quote:
Originally Posted by Manarius
Coolant Temp Sensor almost always affects warm engines.
Is that from personal SVX experience?
Reply With Quote
  #6  
Old 04-18-2006, 04:26 PM
Manarius's Avatar
Manarius Manarius is offline
1995 Subaru SVX LSi Polo Green
 
Join Date: Jul 2005
Location: Grantham, PA (Near Harrisburg)
Posts: 2,119
Send a message via ICQ to Manarius Send a message via AIM to Manarius Send a message via MSN to Manarius Send a message via Yahoo to Manarius Send a message via Skype™ to Manarius
Registered SVX
Quote:
Originally Posted by Earthworm
Is that from personal SVX experience?
That's the way it is with Subaru engines. You start the car cold, and it fires right up. You drive it and head into MCD's for a Burger to go (or you eat in). You walk out and the thing starts after cranking it for 5-10 seconds (or longer). Plus, coolant temp sensors are the cheapest and easiest to replace out the the three (crank/cam are more than a CTS as I recall; CTS is only $20). When Legacy's do what is described, 9/10 times it's a CTS. Crank/Cam usually affect cold starts (the ECU doesn't know where the crank is at and misfires).
__________________
-Jason
(8/23/07-Present) 1995 Subaru SVX LSi (197k) Polo Green (#1102) 03/95
Mods: DDM Tuning 4500k 35w Low Beam HID, 100w H3 Bulbs, Extra Ground Cables, 15 minute $12.96 mod,
svxfiles designed transmission mount (), sporting a "new" tail light bar,
silver BBS rims, custom power steering cooler (one that doesn't dump ATF constantly), new negative lead cable, no more third or fourth gear
(1977-Present) 1977 Chevrolet Corvette (81k) Silver
(12/01/2011-Present) 2005 Subaru Outback 2.5i Limited 5MT (97k)
I have a bad feeling about this.
-Obi Wan Kenobi
Reply With Quote
  #7  
Old 04-18-2006, 04:28 PM
TomsSVX's Avatar
TomsSVX TomsSVX is offline
Maniac modifier
 
Join Date: Dec 2003
Location: Branchburg, New Jersey
Posts: 15,489
Registered SVX Classic SVX
he is right. The hard start when warm is usually a temp sensor.

Tom
Reply With Quote
  #8  
Old 04-19-2006, 06:12 AM
dcarrb dcarrb is offline
Registered User
 
Join Date: Nov 2003
Location: none
Posts: 3,430
Curiously, my brief episode of hard-starting happened only with a cold engine, at around 32F. Replacing the ECU temp sensor solved the problem... or it vanished coincidentally.

dcb
Reply With Quote
  #9  
Old 04-19-2006, 11:49 AM
TomsSVX's Avatar
TomsSVX TomsSVX is offline
Maniac modifier
 
Join Date: Dec 2003
Location: Branchburg, New Jersey
Posts: 15,489
Registered SVX Classic SVX
works both ways. The ECU doesn't know the coolant temp and doesn't know what is going on so it goes to default which is not always optimal. At least thats what I think

Tom
Reply With Quote
  #10  
Old 04-19-2006, 12:48 PM
Earthworm's Avatar
Earthworm Earthworm is offline
Meow!
 
Join Date: Mar 2002
Location: Winnipeg, Manitoba
Posts: 11,957
Send a message via ICQ to Earthworm Send a message via AIM to Earthworm Send a message via MSN to Earthworm Send a message via Yahoo to Earthworm Send a message via Skype™ to Earthworm
When the ECU doesn't know the engine temp it goes into limp mode (rad fans on, etc)
Reply With Quote
  #11  
Old 04-19-2006, 01:54 PM
TomsSVX's Avatar
TomsSVX TomsSVX is offline
Maniac modifier
 
Join Date: Dec 2003
Location: Branchburg, New Jersey
Posts: 15,489
Registered SVX Classic SVX
or as I like to call it, default. Same thing really, just messes with the fuel and timing tables and can cause hard starts

Tom
Reply With Quote
  #12  
Old 04-19-2006, 07:14 PM
Hocrest's Avatar
Hocrest Hocrest is offline
Freezepop's are Awesome!!!!
Subaru Silver Contributor
 
Join Date: Oct 2003
Location: Pittston, PA
Posts: 5,334
Send a message via AIM to Hocrest
Quote:
Originally Posted by Earthworm
...limp mode (rad fans on, etc)
The fans in the racer go on when we flick that little switch
__________________
Dave
- 03 Baja - 92 SVX - 86 Brat - 08 OB 3.0
Reply With Quote
  #13  
Old 04-19-2006, 07:17 PM
TomsSVX's Avatar
TomsSVX TomsSVX is offline
Maniac modifier
 
Join Date: Dec 2003
Location: Branchburg, New Jersey
Posts: 15,489
Registered SVX Classic SVX
well I will try and remember it along with the million other things I need to bring to reading

Tom
Reply With Quote
Reply

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -6. The time now is 10:37 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
© 2001-2015 SVX World Network
(208)-906-1122