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1996 GMC Sierra No Cold Start

Tiny
BERNDOG5
  • MEMBER
  • 1996 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 170,000 MILES
I have a problem with a no cold start on my truck. When the engine temp is below freezing it will not start it will just turn over. I may get the occasional engine fire and a short ignition but it will stop immediately then just crank. When the temp is warm no problems starting. I believe it may the the coolant temp sensor that is faulty. Can you give me any input or suggestions if I am heading in the right direction?
Thank much apprediated and fantastic site.
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Wednesday, November 12th, 2008 AT 11:41 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The coolant temperature sensor jobs is to tell the computer that the engine is cold and need more fuel-replace it and see what happens-its like the choke on a Carb system-that gives fuel during initial cold starts-
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Thursday, November 13th, 2008 AT 4:04 AM
Tiny
BERNDOG5
  • MEMBER
  • 1 POST
I replaced the sensor and still the same problem. I tested the line running into the sensor with a circuit tester and could get no sign of anything on either connector. When should the power start running through this line? Any further advice?
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Sunday, November 16th, 2008 AT 11:32 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Turn ignition switch to run then check the 5volts reference on the yelow and black wire


http://www.2carpros.com/forum/automotive_pictures/12900_cts_20.jpg




http://www.2carpros.com/forum/automotive_pictures/12900_cts1_4.jpg

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Monday, November 17th, 2008 AT 1:29 AM

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