Truck runs terrible when it is warm

2001 CHEVROLET SILVERADO
237,712 MILES • 4.8L • V8 • 2WD • AUTOMATIC
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LEONARD AKERMAN
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My truck seems to run terrible but runs better when it's cold. Acts like it's not getting gas. had the fuel line pressure they told me it was good. changed fuel filter and spark plugs. 2 o2 sensors and Mass air flow sensor and EGR valve.
Nov 5, 2019 at 12:20 AM
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LEONARD AKERMAN
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Just as a update: I also had my exhaust system check and they said it was good also.
Nov 5, 2019 at 4:42 AM
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LEONARD AKERMAN
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I'm just curious what you think it could be? if I could I would pick it up and throw it as far as could.
Nov 5, 2019 at 10:56 AM
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JACOBANDNICKOLAS
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Hi:

Has anyone checked the engine coolant temperature sensor (ECT)? This sensor tells the computer how rich or lean to make the fuel mixture based on temperature.

Using a live data scanner, see what the ECT indicates and if it seem correct.

I attached a picture of sensor location. Check to make sure there are no issues with the connector or wiring.

Let me know what you find.

Joe
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Nov 5, 2019 at 11:16 AM
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LEONARD AKERMAN
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Yes, I told that it was bad and they also said that it would not cause my problem.
Nov 5, 2019 at 11:23 AM
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JACOBANDNICKOLAS
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Hi:

You didn't mention the ECT. I rechecked. And, yes it can cause this problem. Reconfirm that it was replaced.

Nov 5, 2019 at 12:57 PM
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LEONARD AKERMAN
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No, I have not replaced it yet. probably try it tomorrow.
Nov 5, 2019 at 1:29 PM
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LEONARD AKERMAN
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Thank you.
Nov 5, 2019 at 1:31 PM
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LEONARD AKERMAN
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I also have another problem with the same truck this problem. I was told about before I bought the truck about three years ago. every so often my brake light and and light comes on the first problem that I told you about just started Wednesday night.
Nov 5, 2019 at 2:13 PM
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RENEE L
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Hello, I am the site's editor. I was reading through your question and I noticed you are asking about two different issues. In order for the site to properly index/categorize questions they need to about one issue. Please post a new question for the brake light issue.

For your convenience here is the link:
https://www.2carpros.com/questions/new
Make sure you are logged into the site before clicking on the link.

Thank you and have a great rest of your day!
Nov 6, 2019 at 6:47 AM
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LEONARD AKERMAN
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Okay, thank you.
Nov 6, 2019 at 6:49 AM
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JACOBANDNICKOLAS
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I would recommend using a live data scanner to determine if the ECT is sending the information correctly. I don't want you to purchase a part for no reason.

Let me know if it helps with the driveability issues.

Joe
Nov 6, 2019 at 10:56 AM
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LEONARD AKERMAN
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I want to thank you all for your help. just put engine coolant temperature sensor on my truck and it's a lot better.
Nov 7, 2019 at 7:26 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
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Wonderful. I'm glad to hear it helped. Let us know if we can help in the future.

Take care,.

Joe
Nov 7, 2019 at 12:11 PM
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