Non starting 1999 tahoe 2 door 4wd

[exp500]

At the stage you are at, I would put a spark tester in coil, then in dist cap. to verify SOLID spark every time to eliminate ICM or coil issues.

 

[exp500]

I keep forgetting so much- PNWVietvet likes to check the wires inside the dist for rub thru. Been a few occurances of that.
A failing crank sensor is possible, as is a cam sensor. Very Rare without a code.

 

[bigfootchiro]

I keep forgetting so much- PNWVietvet likes to check the wires inside the dist for rub thru. Been a few occurances of that.
A failing crank sensor is possible, as is a cam sensor. Very Rare without a code.

I was going to say cam or crank sensor. I had a crank sensor go bad without a code. Also ICM is possible

 

[exp500]

And last one I have for now. Check ground wire to firewall stud.

 

[bigfootchiro]

And last one I have for now. Check ground wire to firewall stud.

I was going to say the same thing hahaha

 

[exp500]

Heres another link for Crank sensor test. Explains the Systems some.
https://troubleshootmyvehicle.com/gm/4.3L-5.0L-5.7L/how-to-test-the-crank-sensor-1
https://troubleshootmyvehicle.com/gm/4.3L-5.0L-5.7L/how-to-troubleshoot-a-no-start-1
Keep posting your results.

 

[east302]

Ok, so I got a different fuel gauge and am reading 62 psi on the fuel gauge when the key is first turned on. The truck won't start. if I pour gas into the throttle body it will start and run for 2 0r 3 seconds.. Are there any other checks I can make at this point to find the cause of the problem?

If it runs on starter fluid then it has spark and no fuel. The pressure reading is hard to reconcile.

Did you check for spark on all eight?

Is the ‘Security’ light flashing?

Similar to the links that exp500 posted, here’s another one with nice step by step pictures.

https://easyautodiagnostics.com/gm/4.3L-5.0L-5.7L/ignition-misfire-diagnostic-tests-1


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[Terry Deason]

If it runs on starter fluid then it has spark and no fuel. The pressure reading is hard to reconcile.

Did you check for spark on all eight?

Is the ‘Security’ light flashing?

Similar to the links that exp500 posted, here’s another one with nice step by step pictures.

https://easyautodiagnostics.com/gm/4.3L-5.0L-5.7L/ignition-misfire-diagnostic-tests-1


Sent from my iPhone using Tapatalk

Multiple times I have said I have spark at all eight plugs.

 

[exp500]

Anti Theft Light Solid on? Flashing? That shuts off injectors.

 

[Terry Deason]

Anti Theft Light Solid on? Flashing? That shuts off injectors.

No anti theft light and no codes.