I HAVE THE A4 LET THAT SEEMS TO LOSE POWER WHEN ON THE ROAD WITH A LOAD. I CALLED OSHKOSH THE REP TOLD ME TO REPLACE THE FUEL FILTERS WHICH I DID AND NOW THE TRUCK ACTUALLLY PERFORMS WORSE NOW WITH OUT A LOAD IT HAS THAT SAME ISSUE EVEN AT HIGH IDLE IT SEEM LIKE ITS SUCKING IN AIR BUT WHEN I DO THE PRESSURE TEST IT CHECKS OUT FINE AS WELL AS EVERY OTHER TEST ANY IDEAS?
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