Starts then shuts off

Tiny
DISGUY
  • MEMBER
  • 1999 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
I have changed the fuel pump, spark plugs, mass air flow, fuel filter. Tested the fuel pressure and it is good. Also, tested spark. It was a bit weak, but sparking. Any suggestions why it would start up then then stall immediately?
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Tuesday, October 27th, 2009 AT 1:04 PM

34 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
My first thought was the theft system? Is the theft/security light on or flashing, anything? If not I would replace the crankshaft angle sensor which sound like it is having a problem. This guide will help you step by step.

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

Here is the video

https://youtu.be/sKo7xRWVNqY

Please run down these guides and report back.
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Tuesday, October 27th, 2009 AT 1:30 PM
Tiny
DISGUY
  • MEMBER
  • 3 POSTS
I checked for codes, but none popped. The security light would flash as I start it, but then disappears arfter it starts, then dies. Also, the igition is still on the "on" position with no security light. Im not sure if the security light should keep flashing. Flustered.
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Tuesday, October 27th, 2009 AT 3:10 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If it was the security system, the light should have stayed on or flashing, plus codes. Does it die without putting it in gear? Without something to point us in some direction?? When the engine stalls do you hear the fuel pump in the tank running?

This guide will help as well

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please run down this guide and report back.

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Tuesday, October 27th, 2009 AT 4:15 PM
Tiny
DISGUY
  • MEMBER
  • 3 POSTS
Yes.I just came back from iraq and it wont start. But yes, I would start it, run for a few seconds then die with no time to get it in drive. As for the fuel pressure, when I crank it, pressure builds to. I want to say 65 and it holds. My neighbor helped me change out the crankshaft sensor and the problem is fixed! Thanks for helping me I love this site.
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Tuesday, October 27th, 2009 AT 5:11 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.
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Tuesday, October 27th, 2009 AT 9:29 PM
Tiny
JAMES1970
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET TAHOE
  • 218 MILES
Shut off while I was driving and now it will not start. I checked the fuel pump and my fuel filter and my spark plugs are getting a spark. I have not hooked it up to a computer because I had it towed to my home. What should I look at next for the it ran for a second then cut back off?
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Tuesday, February 19th, 2019 AT 11:00 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,990 POSTS
Check the fuel pressure if it is within specs.
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-3
Tuesday, February 19th, 2019 AT 11:00 AM (Merged)
Tiny
JO MORALES
  • MEMBER
  • 7 POSTS
1999 Chevrolet Tahoe engine shut off while driving. Pulled over tried to turn on but will not start what can it be? Please!
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Tuesday, February 19th, 2019 AT 11:00 AM (Merged)
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I am Danny.

Have you tested the fuel pressure? I have attached a link on how to steps. If you do not have one most auto part stores (Pep Boys, O'Reilly's, Autozone) have a free tool loaner program. Your car should have 60-66 P.S.I. Hope this helps and feel free to ask any other questions if needed.Thanks for using 2CarPros.
Danny-

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Tuesday, February 19th, 2019 AT 11:00 AM (Merged)
Tiny
JO MORALES
  • MEMBER
  • 7 POSTS
I have not checked it. I will as soon as I figure out why my 2005 Maxima suddenly turned off. I swear if it is not one thing it is another. I checked the Maxima and it is giving me codes related to throttle body but I just replaced it for new throttle body. Ugh
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Tuesday, February 19th, 2019 AT 11:00 AM (Merged)
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again
Sorry to hear about your luck! If you tell us the code numbers we can help. Get back to us when you can and we will help. Let me know when you check the Tahoe's fuel pressure when you have a chance and we will go from there. Hope this helps and thanks again for using 2CarPros.
Danny-
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Tuesday, February 19th, 2019 AT 11:00 AM (Merged)
Tiny
JO MORALES
  • MEMBER
  • 7 POSTS
P0726 p1726 u1000 this are the codes it has right now. Last week it had a cylinder one misfire so I replaced the spark plug in that cylinder because it would loose power while at the stop light. Felt like it wanted to turn off. But did not. After I replaced the spark plug code was gone and did not come back. Felt good up until two days ago after driving it long periods it began doing it again but felt slighting different and longer time. And today while it was on, but still was on park. It suddenly turned off now it will not start.
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Tuesday, February 19th, 2019 AT 11:00 AM (Merged)
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

The u1000 code is the ECM not being able to communicate with any other systems. The P0726 code is Engine Speed Input Circuit Performance. The P1726 code is Electric Throttle Control System. I will do some research and get back to you on those.
Danny-
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Tuesday, February 19th, 2019 AT 11:00 AM (Merged)
Tiny
JO MORALES
  • MEMBER
  • 7 POSTS
I found this for the u1000 code.
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Tuesday, February 19th, 2019 AT 11:00 AM (Merged)
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

I will look into it and get back to you. Are you the original owner? Bought car new?
Danny-
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Tuesday, February 19th, 2019 AT 11:00 AM (Merged)
Tiny
JO MORALES
  • MEMBER
  • 7 POSTS
No my best friend was original owner he gave it to me when he got cancer so this car means alot to me
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Tuesday, February 19th, 2019 AT 11:00 AM (Merged)
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Okay, I will check and get back to you.

Danny-
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-1
Tuesday, February 19th, 2019 AT 11:00 AM (Merged)
Tiny
FIRE788
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET TAHOE
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 254,000 MILES
Truck died going down road it will turn over but won't start I have checked fuses no codes in computer checked coil pack and distributor they are both firing, when I turn the key on I can hear the fuel pump turn on. Not sure what else to check
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Tuesday, February 19th, 2019 AT 11:01 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,606 POSTS
Check fuel pressure first should be 60-66 psi auto parts rent gauge.
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Tuesday, February 19th, 2019 AT 11:01 AM (Merged)
Tiny
HGRIER40212
  • MEMBER
  • 3 POSTS
  • 1999 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 185,000 MILES
My 1999 Thaoe will just stall then eventually die. I can drive the truck for about 10 to 15 minutes then it will just cut off on me. Before it cuts off it will begin to stall then it will just die. I can statr it again then it will do the same thing after traveling about 5-10 yards. I just got the spak plugs changed and I got a new water pump this past weekend because it was leaking antifreeze. I do not have a lot of money and I am a single mother on the verge of being fired from work. What could my problem be!
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Tuesday, February 19th, 2019 AT 11:01 AM (Merged)

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