My 1995 Yukon 5.7 liter 4 wheel drive starts you can rev it up then the rpm drops down to nothing it almost like it gets gas but only in spurts we have changed the fuel filter idle air temp control distributor coil pack swapped out the fuel regulator from another truck ran good for about an hour then it went right back to what it was doing before PLEASE HELP running out of ideas

 

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Figured it out after about $800 later it was the fuel pump solenoid