My car started surging today when I am in drive at speeds between 50 and 60-65, once over that or under acceleration, the car does not do it. The surging is very light and goes away with even light throttle, I replaced the TPS just a few months ago.

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2001 Black Bonneville SSEI with the following mods:
3.4 pulley, autolite 104's, 8.8mm wire set, FWI, throttle body spacer

could possibly ber egr ports getting carboned up

Doesn't really sound like it in your case but my surging was caused by a faulty MAF sensor.

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2000 SE: 17" Chrome Grand Prix GTP wheels, Pirelli P-Zero Nero Rubber.
180,000 miles and running smooth

sounds like ignition to me... how are your coils, plugs and wires?

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Andrew - owner/operator of Bonnevilles Unlimited

2004 Bonneville GXP | 60k | White Gold Tricoat | custom built supercharged 3800 hot rod | garage queen
1997 Corvette | 55k | Silver Metallic | Z06 wheels | Date-night Hauler/Parts runner
2014 Town & Country Limited | Cashmere Pearl | 95k | Family Hauler
2002 Ram 1500 Quad Cab Sport | Black| 260k | Official Bonneville Hauler

Sorry everyone, been really busy. Had the car scanned and came up with 4 trouble codes, 2 for the EGR, 1 for misfire and 1 stored for converter slip. The reading for the EGR was 7% at key on, so the egr was totally trashed, replaced that today, and doing my plugs and wires tomorrow. 1 plug wire was burned or arcing, and one or more plugs may have fouled from the egr. Good news is NO KR!!!!!

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2001 Black Bonneville SSEI with the following mods:
3.4 pulley, autolite 104's, 8.8mm wire set, FWI, throttle body spacer

could my spark plugs be part of my surging with no CEL on..? my throttle body plate doesnt click when i let the lever go...the plate closes but the lever kinda bounces back...i dont want to waste money and change my TCC solenoid when it could be somthing i could tackle...but every time i throttle up to 30-35 mph the car jumps to the 1500 rpm range...could it be MAF without CEL..? it stops this one i release the gas pedal or tap the brake while still throttling...please help

Please start a new thread if you haven't already.

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WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser, 3.45 diff and various Camaro suspension bits, LED Taillights