starts then shuts off

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.

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.

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.

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.

Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.

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?

Check the fuel pressure if it is within specs.

1999 Chevrolet Tahoe engine shut off while driving. Pulled over tried to turn on but will not start what can it be? Please!

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

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

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-

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.

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-

I found this for the u1000 code.

Hello again.

I will look into it and get back to you. Are you the original owner? Bought car new?
Danny-

No my best friend was original owner he gave it to me when he got cancer so this car means alot to me

Hello again.

Okay, I will check and get back to you.

Danny-

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

check fuel pressure first should be 60-66 psi auto parts rent gauge.

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!

When it dies, you need to check for spark and fuel pressure so we can figure out what it is.What you describe sounds like a fuel pump, but we need to be sure, that is an expensive part to just throw at it.

Chevy Tahoe starts up fine then dies after 1 second

Check the fuel pressure with a fuel pressure tester if its within specifications

And if it is out of specs or in specs what then?

Engine cranks up and then stalls i have 55psi on fuel pressure and i can pour fuel down the trottle body and it stays running

Your fuel pressure should be 60-66psi yours is on the low side-and also Check if the injectors are pulsing

my fuel pressure is 60 and my injectors are pulsing

Truck had been dieing while idling, while driving 70 mph on freeway, or just driving through neighborhood, but will always start back up sometimes instantlly some times about ten min. later. Codes showed a few different things it could be did a few test and found the following problems that are all now fixed. Changed spider fuel assembley, fuel pressure reg., EGR, O2 sensors, plugs, wires, distributer cap, runs great but still dieing. Running out of options, frustrated and need some help. Would make a donation, but this money pit in my driveway has left my pockets pretty bare.

had about the same problem try cleaning your trottle body. i used mass air flow sensor cleaner (its what i had) you can use alcohol just make sure its dry before you put it back together. make sure your air filter is clean to.

What were the codes that were present before you replaced everything? Have you checked the TPS (throttle position sensor) - IACV (idle air control valve) IATS (intake air temperature sensor) - CTS (coolant tempertaure sensor) What is the fuel pressure? Have the ignition module and the coil tested. Autozone or a place like that will do this for free.

Engine Performance problem
1999 Chevy Tahoe V8 Four Wheel Drive Automatic

I found TDC, Installeed cap, Marks match #1 . Starts ruff, almost stalls, engine smooth at high rpm, put in gear, wont move? . I have it floored but won't get any higher then 1500 rpm.

Take the tahoe to the dealer to have it timed..

1999 Chevy Tahoe starts but stalls. any suggestions on what could be problem?

Hi,

There could be a couple things causing this. I hate to ask this, but I need you to start a new thread. Simply copy and paste your question as a new question. Someone will answer it promptly. We are asking this simply because we are trying to keep all threads specific to one topic. I hope you understand.

Joe