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Message: <blockquote data-quote="Kraest" data-source="post: 1019827" data-attributes="member: 17206">Hey, guys. I have a 98 GT and have replaced almost everything on the car... There are no codes present, but the car runs fine at part throttle, but bogs like it's starving for fuel at 50% throttle when cold and down to 25% throttle when warm... .I'm at my wits end... Any ideas?I've replaced:Fuel PumpFuel FilterFuel InjectorsSpark PlugsO2 sensorsTested the MAF and it appears to be ok with a couple little voltage differences (1.3v idle, goes dead during the bogging situation)Also tested the TPS and it works fine.The only thing I can think of is maybe a MAF problem or Fuel Pressure Regulator problem.</blockquote>