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1996 Chevy Blazer Engine turns over but will not start.

Tiny
BLAZER96
  • MEMBER
  • 1996 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 158,000 MILES
I have a 96 Chevy S-10 Blazer that has a starting issue. When the engine is cold (in the morning) it just cranks over and doesn't try to start. However, when I spray starting fluid into the throttle body it fires right up no problem and it continues to run until I turn it off. The engine will then start again while it is still hot. When I did get it to start, I took it for a drive and it has a very slight stumble at the start of acceleration. I have replaced the coolant temp sensor, throttle position sensor, and fuel pressure regulator. The fuel pump and fuel filter have roughly 16,000 miles on them and I have the proper fuel pressure. I also did a check to make sure I have a spark at the coil and plugs and I have the proper spark. I have no engine light on. It also has a new timing chain that is only 3 months old(don't know if that means anything). What could be the problem? Thanks in advance for your help.
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Tuesday, July 27th, 2010 AT 11:23 AM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi blazer96,

Thank you for the donation.

From the symptoms description, either the engine is not getting enough fuel for cold starts or the compression is low. Get a compression test done to check if they are within specs.
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Tuesday, July 27th, 2010 AT 2:33 PM
Tiny
BLAZER96
  • MEMBER
  • 3 POSTS
If I do have the proper amount of compression, what could be limiting the amount of fuel that is entering the engine?
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Tuesday, July 27th, 2010 AT 2:46 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
If compression is good, then you need to check the injectors, PCM ( engine computer) and sensors such as te Engine Coolant Temperature sensor.

Injectors are controlled by the PCM which acts according to signals received from sensors.
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Wednesday, July 28th, 2010 AT 10:24 AM

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