5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Vibration at highway speeds and Idle ?'s

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Old 08-16-2006, 12:39 AM
  #1  
00limited7
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Default Vibration at highway speeds and Idle ?'s

I only live 8 miles from work so I never get the LX out on the highway and let her legs run. So I've taken it out a few times and I get a bad vibration in 5th gear only on acceleration. As soon as I let off the gas it goes away. Could it be u joints, rearend, tranny?

Also I've just put on a new IAC and a new TPS. I'm trying to fix an dieing problem coming to a stop. Well now the last two times I have started it up I get a flickering CEL and I can here the fuel pump relay click in time with the Check engine light. After a little coaxing it straightens out and drives fine.Does anyone have any ideas? Is it taking the ECM a little while to adjust to the new parts?

Thanks for the replys in advance!

Roger
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Old 08-16-2006, 12:42 AM
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93 LX FiveO
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Default RE: Vibration at highway speeds and Idle ?'s

could be tires, driveshaft, bearings.. tons of other things. if the tires are even slightly worn it will vibrate like crazy on the highway
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