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Surging on Deceleration 700 1989

posted by  pbonsalb on  Tue Jun 17 03:45 CST 2003
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last visit: Fri May 9 09:43 CST 2008
[RELATED]

My 89 745T with LH 2.2 is surging on deceleration. This occurs when my foot is off the gas and the automatic trans is in drive, such as when coasting down a hill or even on the level, after having used some throttle. The surge is from about 1500 to 2000 rpm down to 1000 to 1500 rpm and bounces up and down in that range. I have checked the TPS/switch, idle speed, ignition timing, and AMM. Could it be that the fuel cut on decel is not working? How does one test this? Any other ideas?

Thanks,

Philip






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