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My 98 mark viii sucks gas and has no power until it hits 2500 rpm's

it starts fine and idles a little rough but when you give it gas it stutters and has no power. I had the vcrm rebuilt and it ran fine until i passed a car afterwards and wound it out to over 3000 rpm's and it runs like crap again.

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Your hard throttle use may have pulled a hose lose or a car that age has vacuum hoses that have deteriorated. Have the car checked because it won't suddenly heal.

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You can increase the power to your 98 Mark VIII by increasing the airflow and replacing the catalytic converter with a high-flow unit. You should also think about replacing the spark plugs to improve fuel ignition.

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The car needs to be put back the way it was manufactured. Removing emissions controls won't cure the underling defects. And it's in violation of federal and state laws.
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