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1996 Chevy S-10 starting difficulty

Tiny
CRAPPIES
  • MEMBER
  • 1996 CHEVROLET S-10
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
Good morning,
When it's hot outside, I have to crank my engine longer to get it to start, when its cool out, it starts normal.
Any ideas?
Thanks

Russ
Wednesday, May 26th, 2010 AT 10:32 AM

8 Replies

Tiny
INTERNETMECHANIC
  • MECHANIC
  • 700 POSTS
How long since a tune-up? When the problem occurs, use a gage and check fuel pressure. Some of the national brand autostores used to loan out a fuel pressure gage, if you don't have one. The cts could cause fuel issue? Any applicable trouble codes? I need more information.
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Wednesday, May 26th, 2010 AT 1:01 PM
Tiny
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Hi, thanks for responding. Two years since the tune up.
I am more of an idiot than a mechanic. Is the fuel pressure test something I can do?
This only happens when it is hot out. I have noticed that when I release my gas cap to fill with gas there is a gust of pressure that comes out. My S10 runs pretty well but I also noticed during the heat That it'll hesitate accelleration from a dead stop once and awhile (4 times in one week. It doesn't kill though. Could it be my coolant temp sensor? What is the cts?
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Wednesday, May 26th, 2010 AT 1:09 PM
Tiny
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Yes, you can check fuel pressure, using a gage. The gage fitting screws onto the schrader valve. If there is any pressure on the system, gas will squirt everywhere when you depress the valve. After the vehicle sits overnight, there usually isn't much pressure, but, you still need to be aware. Use a shop rag around the fitting when connecting. In the diagram, #4 is the schrader valve, that diagram is for the spider fuel system. The picture came from autozone, the only one I could find.


https://www.2carpros.com/forum/automotive_pictures/512072_spider_system_schrader_valve_1.jpg

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Wednesday, May 26th, 2010 AT 2:27 PM
Tiny
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Do you want pressure when you test this?
What did you think about the coolant temp sensor idea?
Also, could the fuel pump relay be dirty or something.
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Wednesday, May 26th, 2010 AT 2:54 PM
Tiny
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I wouldn't replace anything without doing some testing. Ater you hook-up the gage, key on, no crank, there should be pressure, write it down. Engine running, check pressure. After you turn the key off, see that the pressure doesn't drop like a rock. As far as the cts, coolant temp sensor, I don't see anything definitive? If no fuel pressure, we do some more testing.
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Wednesday, May 26th, 2010 AT 4:03 PM
Tiny
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I'll see if I can do this before my surgery (back).
Thanks for your help. I will do this test.'
What is your opinion about all the pressure that gets released at the gas cap when I take it off? More when its hot out.
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Thursday, May 27th, 2010 AT 5:53 AM
Tiny
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Right now, I don't think the pressure means anything, seen it many times.
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Thursday, May 27th, 2010 AT 9:01 AM
Tiny
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So what is your thought why the hard start happens if the S10 sits in 90 degree weather for 5 hours vs the same situation in cool weather the engine starts as soon as you turn the key.
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Thursday, May 27th, 2010 AT 9:34 AM

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