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High Evo 8 high idle problem / surge

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Old Apr 17, 2022 | 05:28 PM
  #1  
esad678's Avatar
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High Evo 8 high idle problem / surge

having trouble with my idle, just randomly started idling high after a drive
idles around 2-3k with surges up and down
cant find any vacuum leaks
replaced the idle air control valve and TPS with cheap ones off of ebay just to see if it would make a difference ( nothing changed)
video below for reference
anyone ever run into this issue before?
car was running and driving fine prior
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Old Apr 19, 2022 | 11:24 AM
  #2  
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kaj
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It's usually a vacuum line. They may all look fine but one could still be bad. Especially if it stopped working after a drive. That's when one will pop off or develop a crack.
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Old Apr 22, 2022 | 12:03 PM
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I had a surge and it was the aftermarket manifold pressure sensor. Good luck. I bought a used one off ebay for cheap and it worked. Also just spend the $400 on the oem air idle valve if thats it. the ebay ones didnt work for me.cant speak for the tps.
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