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Old 10-21-2012, 12:30 AM
Fryguy Fryguy is offline
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Default 5.2 dies when cold and idles high when warm

I have a 2001 5.2 liter 4 wheel drive that after sitting will not idle until it is warm. then after it is warm it will idle ok until i shut it off and start it again, then it will idle high. the only code is 0455 which is some kind of emissions leak.any ideas?
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Old 10-23-2012, 12:26 PM
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This sounds like a throttle positioning sensor(TPS) to me, or Idle air control(IAC). I have had a different car(totally different brand even,Lincoln) that acted same way. I am just throwing out an idea
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Old 10-23-2012, 07:37 PM
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I still say this section should be deleted, as there were never 318's in 3rd gens.
That being said, check all the tubing under the hood that runs everywhere relating to the emissions system, could be you've split a hose somewhere. The code may be totally unrelated to your symptom. See if cleaning your TB helps at all.
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