New Evo VIII owner..help with rough idle.
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New Evo VIII owner..help with rough idle.
Hello first post here. Picked up an unmodified 2003 Evo VII a few months back. Car has 74k miles and not a hint that it was ever modded. The issue I am having is the idle is rough. It does not seek or die out. It stays consistent at 950 rpms and feels slightly lumpy almost as if there is a miss. When the AC is turned on however you can feel the vibes much stronger.
What I have done -
Cleaned MAF
Changed spark plugs
Cleaned IACV and checked function.
Checked TB for carbon buildup and function.
Checked for boost leaks (did not test with a leak tester).
Where should I go from here? Car runs fine otherwise. Pulls hard and keeps up with cars it should. Seems like no power loss. Just a lumpy idle that is a little high.
What I have done -
Cleaned MAF
Changed spark plugs
Cleaned IACV and checked function.
Checked TB for carbon buildup and function.
Checked for boost leaks (did not test with a leak tester).
Where should I go from here? Car runs fine otherwise. Pulls hard and keeps up with cars it should. Seems like no power loss. Just a lumpy idle that is a little high.
#7
^^Agree with everyone else, check for after market cams
Any noises? like air leaking?
I had a rough idle a lil while ago and it ended up being a torn o ring from the injectors
Any noises? like air leaking?
I had a rough idle a lil while ago and it ended up being a torn o ring from the injectors
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Also the car showed 145 psi across all cylinders so its likely not a head issue.
#12
#13
my car does the exact same, it runs awesome doesnt lack performance or anything but at a stop light it has a slight hesitation like its cammed when its not, took it to my tuner and he said theres nothing wrong with it n that some cars just act like that. So unless its totally unbarable or its lacking performance i wouldnt worry too much about it
#15
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good luck