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		Toyota Nation Forum : Toyota Car and Truck Forums > Toyota Passenger and Sports Car Forums > Supra Forum
Causes of surging

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10-23-2009, 09:53 PM	#1 (permalink)
Mark Moore New TN User Join Date: Oct 2009 Location: N.C. Posts: 2 Gameroom cash: $1500 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Score: 0 reviews	Causes of surging Rebuilt a 87 7mg in my son's supra. Fired up fine, but surges at anything over 800 rpms. It is really bad. It will throttle up and then its like the fuel is cut off and then it will ramp back up to the same rpm and then cut off. Got any ideas?

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10-23-2009, 11:02 PM	#2 (permalink)
*bgrieger* one turbo is one too few Join Date: May 2002 Location: Toronto Posts: 2,866 Gameroom cash: $309150 Thanks: 7 Thanked 31 Times in 28 Posts iTrader Score: 1 reviews	any codes? A wide variety of airflow sensor, throttle position sensor, idle air controller or other issues could be at play.

10-26-2009, 10:50 AM	#3 (permalink)
Mark Moore New TN User Join Date: Oct 2009 Location: N.C. Posts: 2 Gameroom cash: $1500 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Score: 0 reviews	There were no codes. I, or my son had incorectly instaled the TPS. Put it back on right and the whole thing got well. Thanks for your reply and look forward to learning lots more about T's on the forums!!!! Thanks again!

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