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Message: <blockquote data-quote="mrspeedy69" data-source="post: 384005" data-attributes="member: 9175">Well today i ran seafoam through the car and sprayed their deep creap and cleaned the throttle body. Went and ran it all out and it seemed fine. Then i changed the plugs to NGK Platinums, the car started fine and everything so i thought it was all good. Also i was going to replace the fuel filter, and a buddy of mine and i tried to take it off but couldn't get it off for some reason. So we just hooked it back up and left it alone.Well later tonight i went and drove it and when i hit about 4k it just falls on it's face like its cutting out. Seems like if i ease into it, it will go over 4k but when i push on the gas hard it just cuts out...anybody have any clue what to check? Oh and it's a 98 Cobra.</blockquote>