i have a 93 gmc sierra 4 wheel drive with a 305?

[remeyn mechura]

and at first it only ran without idling, but now it will only idle and not run. what could be wrong with it?

 

[Molson02536]

and at first it only ran without idling, but now it will only idle and not run. what could be wrong with it?

Your fuel pressure is sensitive to changes in the TBI system. Start with the simple and replace your fuel filter. The filter is located on the inside frame rail under the drivers door. Good luck and keep us posted, #6 is your fuel filter.

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