1996 GMC Sierra No Cold Start

1996 GMC SIERRA
170,000 MILES • V8 • 4WD • AUTOMATIC
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BERNDOG5
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  • 1 POST
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.
Nov 12, 2008 at 3:41 PM
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RASMATAZ
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  • 75,988 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-
Nov 12, 2008 at 8:04 PM
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BERNDOG5
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  • 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?
Nov 16, 2008 at 3:32 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Turn ignition switch to run then check the 5volts reference on the yelow and black wire


https://images.2carpros.com/forum/automotive_pictures/12900_cts_20.jpg


https://images.2carpros.com/forum/automotive_pictures/12900_cts1_4.jpg

Nov 16, 2008 at 5:29 PM
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