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#9: 10-14-2004, 01:04 PM
 Whitestar Pilot
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Location: American Empire
Car: Old Toyota Avalon/LS1 Trans Am
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I've noticed it a few times while entering expressway ramps.

One time I floored the gas pedal to see if it would stop but the studder continued, I let off at 4500rpm in 3rd because I only had 500 miles on the car.

Lately, approaching 1,000 miles on the car, I've begun to run it a little harder, and most of the time there is no studder.

I wonder if it is an ignition/electrical problem, it makes the car feel like it needs a tune-up, but since this is a new car, obviously it does not.

I also wonder if gutting the up-pipe will solve the issue.