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Rapid bursts of air. Usually followed by jumpy boost gauge (tho mine didn't when surging) and lack of power. Feels to me like the truck doesn't wanna go any faster until it changes gears.
It's NOT the whoosh that comes out as the trans shifts or you let off the pedal. That's stall.
Basically, if you feel like your power is limited when that rapid sound comes in, it's surge.
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Jerry
My PSD X
2000 Excursion 7.3L PSD 4X4
DP-Tuner F5 : no start, stock, 40T, 80T, 80E - AutoMeter A pillar w/ 3 Phantom gauges - DIY Tymar intake w/ serviceable S&B filter - Zoodad mod - B&M HD Trans rebuild w/ TransGo Shift kit & Amsoil Fluid- BD Triple Disc Billet Torque Converter - Exhaust : 4" Turbo Back (w/ 4" down pipe) Stainless Steel Magnaflow - ATS housing and 4" intake sleeve - Turbo Master Wastegate Controller - Dieselsite HX Oil Crossover - Morse Ceramic brake pads - Monroe Reflex Shocks - Energy Suspension Bushings - IC foil wrap delete - Fumoto Oil Valve - 08' Aluminum Rear Differential Cover - White Night reverse light system - Garmin StreetPilot c340 GPS - 6.o tranny cooler - Dieselsite Coolant Filter - Amsoil Single Bypass Oil Filter w/ Rotella 5W40 synthetic oil - APC white gauge face - Dual in-dash DVD
TOWING:
1996 30' KIT travel trailer - 7000lbs
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Linear Mode
