Question about 1998 Chevrolet Astro

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Have a1998 astro van that wont start until I spray starting fluid in the throttle body, then starts up and runs fine until about two hours later I go to start it back up and it wont start again.PLEASE HELP ME!!

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  • Chevrolet Master
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The first thing you need to check is fuel pressure. This type of fuel system requires a minimum fuel pressure of 56 psi to start. Anything less, even as little as 1psi. And it will not start. It starts and runs when you add the starting fluid because the poppets (the mechanical injectors located at each cylinders intake runner) require less fuel pressure to operate when the intake is under vacuum.

This is a classic symptom of low fuel pressure. A new fuel pump is the typical fix for this problem. Don't skimp on quality if you do need a new fuel pump. They are not all the same.

Posted on May 24, 2011

  • nicnlinz May 24, 2011

    Dear airjer995, thank you for you suggestion and I thought that might be that but just wanted to make sure there was no throttle body or primer injector problems.THANK YOU and GOD BLESS YOU!!

  • Jeremy W.
    Jeremy W. May 24, 2011

    There is no fuel primer injector. The 98 uses a CPI unit that consists of six electronic injectors that feed fuel to sic mechanical injectors. Itshe mechanical injectors that require the higher fuel pressure in order to overcome there mechanical resistance and open up.

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SOURCE: Have a1998 astro van that wont start until I spray

IM SURE YOUR PROBLEM IS ABOUT GAS,COUSE IF IT START WHEN YOU SPRAY START FLUID IT MEAN THERE NO GAS AT ALL,SO WHEN YOU TURN THE KEY SWITCH FORWARD THE SENDING UNIT HAVE SEND GAS TO THE CAR TO START,ITS NOT DOING IT BUT ONCE IT START WITH THE FLUID IT KEEP SENDING GAS , FIRST TAKE THE GAS LINE OUT BY THE ENGINE THEN TURN THE CAR SWITCH TO ON POSITION LIKE TRYING TO START THE CAR BUT DO NOT ALLOW TO DO SO,IS JUST LIKE MAKE THE CAR CRANCK TO SEE IF WHEN YOU TURN THE SWITCH THE SENDING UNIT ITS WORKING IF WHEN YOU DO THAT NO GAS COMING OUT OF THE GAS LINE ,SENDING UNIT IS NOT GOOD ,HAVE TO CHANGE IT,IF IT WORK PROCEED TO THE UNIT FALLOW THE GAS LINE

Posted on May 24, 2011

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Have a1998 astro van that wont start until I spray starting fluid in the throttle body, then starts up and runs fine until about two hours later I go to start it back up and it wont start again.PLEASE HELP...


IM SURE YOUR PROBLEM IS ABOUT GAS,COUSE IF IT START WHEN YOU SPRAY START FLUID IT MEAN THERE NO GAS AT ALL,SO WHEN YOU TURN THE KEY SWITCH FORWARD THE SENDING UNIT HAVE SEND GAS TO THE CAR TO START,ITS NOT DOING IT BUT ONCE IT START WITH THE FLUID IT KEEP SENDING GAS , FIRST TAKE THE GAS LINE OUT BY THE ENGINE THEN TURN THE CAR SWITCH TO ON POSITION LIKE TRYING TO START THE CAR BUT DO NOT ALLOW TO DO SO,IS JUST LIKE MAKE THE CAR CRANCK TO SEE IF WHEN YOU TURN THE SWITCH THE SENDING UNIT ITS WORKING IF WHEN YOU DO THAT NO GAS COMING OUT OF THE GAS LINE ,SENDING UNIT IS NOT GOOD ,HAVE TO CHANGE IT,IF IT WORK PROCEED TO THE UNIT FALLOW THE GAS LINE

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