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evo 8 infamously bad idle.

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Old Sep 11, 2012, 12:48 PM
  #16  
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Yes stock flywheel
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Old Sep 11, 2012, 12:59 PM
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My friend had a similar issue when he bought his evo. It would die sometimes up hills or going to a stop. Turns out someone screwed the biss all the way in and broke it. Once we change it out, it fixed the issue. Its worth a look. Be extremely careful, its made of very weak plastic.
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Old Sep 11, 2012, 01:06 PM
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Check for a Vacuum leak to the EGR plumbing at the back of the IM. Also wouldnt hurt to check and see if you have a leaky throttle body while youre at it.
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Old Sep 11, 2012, 01:19 PM
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How do you check to see if you have a leaky throttle body?
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Old Sep 11, 2012, 02:06 PM
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Look behind the glovebox and see what brand is the ECU.
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Old Sep 11, 2012, 03:11 PM
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Im not by my car so i cant look but im pretty sure its stock.
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Old Sep 11, 2012, 07:40 PM
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Mine was solved by doing an egr delete. Idle is as smooth as ever now
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Old Sep 11, 2012, 09:15 PM
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Originally Posted by smoothjazz
When im in n at a good operating temp if will idol fine but randomly my rpms will drop from idol 1800 to like 200 almost die then idol fine again and almoat every time i cluch in when coming to a stop it happens. I dont know what my speed
density is
Im gonna say this AGAIN! Are you on speed density or maf ? If you already replaced the IAC and its still doing that, its most likely to be the bov that you have vta. Then again if you still have the maf with a leaky bov.
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Old Sep 11, 2012, 09:17 PM
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Another thing what kind of bov do you have ? If you can recirculate it, do it and see if it fixes the idle..
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Old Sep 11, 2012, 09:52 PM
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I run speed density no maf and it was running fine before vta so i dont think it could be that. I appreciate all the feedback too guys. Good stuff.
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Old Sep 12, 2012, 08:46 AM
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Originally Posted by sternevo8
Mine was solved by doing an egr delete. Idle is as smooth as ever now
what kind of peoblems did your evo have before you added the egr delete and what is it?
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Old Sep 12, 2012, 08:52 AM
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mine had a pvc hose lose. something really simple. i was doing catch can install and it popped off.
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Old Sep 12, 2012, 09:28 AM
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Originally Posted by smoothjazz
I run speed density no maf and it was running fine before vta so i dont think it could be that.
Could you please clarify?
Your sentence implied that you ran "Speed Density" BEFORE "Vent-To-Atmosphere".
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Old Sep 12, 2012, 09:43 AM
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Oh i meant my car was running fine like a month ago. I currently vta and have been this whole time. This leads me to believe that my bov is not the problem.
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Old Sep 12, 2012, 09:45 AM
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I think it could be a loose hose or a vacuum line or something like that. How can i check those?
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