When the vehicle is hot it does not start properly?

Tiny
PRRYPERRYS
  • MEMBER
  • 2006 CHEVROLET EQUINOX
  • 3.4L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 95,000 MILES
When the car is cold first start turns the key fires up instantly. When car is hot, turn the key and it will not start unless I give it gas.
Tuesday, January 17th, 2023 AT 10:51 AM

15 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
Yep, this sounds like a vacuum leak or a dirty throttle body. Here are three guides to help us fix the problem with instructions below to show you how on your car. Please follow this guide with the engine cold only.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/throttle-actuator-service

and

https://www.2carpros.com/articles/engine-cranks-excessively-before-starting

Please go over these guides and report back.
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Tuesday, January 17th, 2023 AT 4:25 PM
Tiny
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Hey, my friend, thank you. I looked under the hood today and I did see the PVC valve has never been changed, it has a rivet to hold it in. So, I purchased a new one in the holes on it was so much air could come around the PVC valve it was one, so I purchased a new one I'm going to put it on tomorrow and then I'll give you guys an update and thank you hit it right on the button. With the PVC because I already changed the MAF, and the MAP, air filter, purge sensor, in the car runs great it's only at idle that I have this problem only a stop signs when in park and neutral I don't have the problem. I think it's the PCV valve like you said I'll give you update tomorrow. Thank you. Kenny
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Tuesday, January 17th, 2023 AT 7:31 PM
Tiny
KEN L
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Good find, please let me know if that fixed the problem, also I would service the throttle body as well.
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Wednesday, January 18th, 2023 AT 10:25 AM
Tiny
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Hey Ken, that was part of the problem. Thank you, my friend. I changed the PVC valve that got rid of the oxygen sensor code. Now I have two City inspection codes left EVAP system mon incomplete EGR system mon incomplete. Things I have changed. Due to air intake that I know. EGR valve, MAF sensor, MAP sensor, PVC valve and hose the hose was definitely no good. Today I went to the dealer in bought a new gas cap for $44.00 because I know some time that aftermarket gas caps will throw your vehicle off. I'm not an automobile technician, I'm a chef. So, I don't know too much, that's why I Google what's wrong with the vehicle and ask questions with you guys and Friends.
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Thursday, January 19th, 2023 AT 11:24 AM
Tiny
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Do you guys have an enlargement of a vacuum hose diagram for this car it could be a vacuum hose I don't know I don't know where they all are. Or are there any more components that have to do with the air and gas mixture that I haven't changed? When I'm driving more than 10 mph it runs like a brand-new car, this is unbelievable. It also runs good when it's in park or in neutral only when I have my foot on the brake at a stoplight, I get the issue.
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Thursday, January 19th, 2023 AT 11:49 AM
Tiny
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Oh and of course starting it will not start unless I pressed the gas when engine hot. We engines cold I turn the key one to two seconds it fires right up.
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Thursday, January 19th, 2023 AT 11:53 AM
Tiny
KEN L
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Did you find anything when using the vacuum leak guide? Here is a vacuum line diagram. Also, let's run the codes to see what comes up.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Check out the images (below). Please let us know what happens.
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Friday, January 20th, 2023 AT 9:49 AM
Tiny
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Good morning, Ken, hope all is well, I didn't find anything. It's still doing the same thing I've been Googling some stuff. Says it could be the throttle body think is called the TPS or TCP on the side of the throttle body whatever that's called the electrical part. What do you think?
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Monday, January 23rd, 2023 AT 6:04 AM
Tiny
KEN L
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Yep, the throttle body can be bad and the TPS is internal and not serviceable. Here is the location of the throttle body. But it can be the throttle pedal sensor problem as well, have you run the codes? Check out the images (below). Please let us know what happens.
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Monday, January 23rd, 2023 AT 12:17 PM
Tiny
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Hey, my friend, I ordered the throttle body. I'm going to put it on and reset it. With a video I seen online I hope it's correct is there anything special I need to do after I put the throttle body on I know it said disconnect the negative post and install the throttle body then then connect battery and turn the key on for a two seconds then off then on for 10 more seconds something like that I have it is that correct. I may have to Google the instructions again on resetting it. I know it was something like that, it should be here tomorrow.
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Monday, January 23rd, 2023 AT 7:03 PM
Tiny
KEN L
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The instructions are in the images above, so I think you are good there. Let me know what happens.
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Tuesday, January 24th, 2023 AT 12:19 PM
Tiny
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Thank you, Ken, going to try to work on it today if I can beat the snow, I'll keep you informed thank you.
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Tuesday, January 24th, 2023 AT 10:04 PM
Tiny
PRRYPERRYS
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Good morning, Ken, hope all is well. I think I found the problem thanks to you guys. Brake booster garment was so loose I changed it yesterday I drove the car about 20 miles. It's running so much better absolutely no shaking I think I need to drive it a little more which I'm going to do today but I think that was the issue. Based on the way the car drove yesterday. Thank you, you guys are awesome. Kenny
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Monday, January 30th, 2023 AT 7:15 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Thanks for letting us know, we are here to help, please use 2CarPros anytime.
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Monday, January 30th, 2023 AT 11:28 AM
Tiny
PRRYPERRYS
  • MEMBER
  • 143 POSTS
Hey Ken, hope all is well, the car is running great. Thanks to you guys for helping me out. There were a number of things, the biggest issue was that Gourmet on the brake cylinder and the elbow on the PVC valve, I was coming everywhere but it is running awesome now like a brand-new car. And I also change the purge Central and the MAF, end it MAP sensors. Now I will be sending you something about my Jaguar it has a cold p1647 I'll talk to you soon have a blessed and wonderful day. Thank you, you guys are the greatest.
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Wednesday, February 8th, 2023 AT 12:29 PM

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