Ignition problems i have a 2000 yukon 5.3l the problem is when i turn it on in the morning it runs perfectly but when i stop it for 15 or so minutes and try to start it again i wont start i have to press the gasoline pedal and then turn it on and it would start i changed the fuel filter, fuel pump, pcv valve and it continues to do the same thing so i dont know what the problem is if you can help me i would apreciated thank you

Car starts then dies in a few seconds - CarGurus

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CarGurusFeb 3, 2014 - Engine turns over fine and starts, but stops in a second or 2. ... Good fuel pressure, starts, runs for about 7 seconds, dies after a sudden drop in fuel pressure. ...starts 15 minutes later, runs fine then stumbles and dies again 3 answers ... I drove carhome shut off and next morning would not start, but will turn ...

94 camry le 4cylinder starts when cold, shuts off .

Start with an error code if any read at your favorite auto parts store. How hot does it get? Possible so hot (cooling system problems) that the block sensor feeding the ECU is telling it there's a problem. A kind of safety system. Double check all cooling system components. Is the Water pump ok, or belt slipping? Battery and electrical system ok?

My guess would be something electrical that is not working due to the temp. Like a relay.
A relay could loose magnetic power for a few tries then start working.
Or the engine temp sensor could be out of calib and telling the computer the temp is 90 degrees when it is only 50.
You could use a scanner to read the sensors and look for something not right.
Without knowing what is missing in the equation its going to be tough to diagnose it. You really need to know if you are loosing voltage to the coil or the injectors or if the fuel mixture is too lean, etc.

1. First, insert the ignition key and turn the ignition switch to the "On" position (Do not start the engine). Leave the switch on for 11 minutes. The security light may flash or be on steady during this 11 minute period. Make sure the light is no longer on or flashing before proceeding to #2 .
2. Turn the ignition switch off for 30 seconds.
3. Turn the ignition switch to the "On" position (as in step #1) for 11 minutes again.
4. Turn the ignition switch off for another 30 seconds.
5. Turn the ignition switch to the "On" position for 11 minutes a third time.
6. Turn the ignition switch off for 30 seconds one final time.
7. Turn the ignition switch to the "On" position one final time and wait 30 seconds.
8. Attempt to start the engine. If the engine starts and runs normally, the relearn is complete. If the engine does not start, Go to this link for info
http://vatspasslockpasskeysecurityhelp.yolasite.com/

Hello, it could be an injector problem, try replacing the #2 injector/.

Check the EGR (Exhaust Gas Recirculation) valve and TPS (Throttle Position Sensor) when vehicle is hot! A failure in either will cause vacuum lock and (lack of fuel flow) when malfunctioning

you have a bad ignition switch but if you turn key on for ten minutes until the light stops flashing then turn off key then try to start this should reset the security system

Theft light on indicates a problem with passlock. You have a problem with the key or ignition switch. When I worked I replaced a lot of ignition switches, so i would say that would be your problem.

Give this a try it might work for you........
When you put the key in ignition, turn it on (not to crank) dos the security light start flashing? If so, you need to either wait 15 minutes or wait with the key on until it stops flashing. Once it stops flashing, try to start again. You should get to try it 2 times before the passlock will lock up again.

check ignition module in the distributor

I have the exact some problem 01 Yukon 5.3 – Sometimes my security light also comes on for no reason? Wonder if this has something to do with the remote starter? When this does happen all I have to do is wait for 15 minutes and it fires up just fine. Pisses me off though…