OK GUYS

WE JUST PUT A NEW ENGINE IN MY BROTHER IN LAWS TRUCK AND IT WONT START UNLESS WE PUT GAS IN THE INTAKE MANIFOLD THEN IT STARTS AND IT STAYS ON BUT WHEN WE SHUT IT OFF AND TRY TO START IT AGAIN IT WILL ONLY TURN OVER.... WHAT COULD BE THE PROBLEM.

THANKS
SPRCHRGDGM

 

What year?

 

ITS A 96 SIERRA

 

By replacing the engine you might have to do the computer relearn procedure as follows:[/align][/align]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, check for trouble codes and address them before attempting the relearn procedure again.
[/align]Make sure you wait the full 11 minutes, this should allow you to start the vehicle and run normal. Also make sure the lights are off and the battery is fully charged as if it is not you will have to start all over. Hope this helps let us know if it does not and good luck.[/align]

 

Or check the fuel pressure...

 

HI
DID YOU FIND OUT THE PROBLEM WHY YOUR TRUCK DIDNT START MINE HAS A HARD TIME STARTING

STEVE