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No boost leak = car is still slow ?

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Old Aug 22, 2006, 11:21 PM
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No boost leak = car is still slow ?

Well i did a leak test and came up with no leaks . Car is running funny , seems to not pull all that hard anymore, and when i rev it up in neutral 3 out of 5 times it will stick , i did have the same problem prior to putting on the AMS UICP with the Tial BOV VTA , at first i thought it might be the new BOV setup but after driving it a few times more the tial seems to be working great . Any ideas as to whats wrong ? Is my turbo going out ? it only has 24,000 miles on my 2005 evo 8
Old Aug 22, 2006, 11:24 PM
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when is the last time you changed your plugs?
Old Aug 22, 2006, 11:24 PM
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i know exactly why.

Last edited by vboy425; Aug 23, 2006 at 09:56 AM.
Old Aug 22, 2006, 11:26 PM
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Maybe the heat.....







or what Vboy said. LMAO
Old Aug 22, 2006, 11:26 PM
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Check plugs, also are you tuned for the UIC? If you give it the gas in 5th around 2500 rpm does it slip? Could be many things.

When you say stick the throttle stays on?

PM warrtalon he may have a better idea.
Old Aug 22, 2006, 11:26 PM
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No the dynoflash was excellent , and from what i know it doesnt wear off lol ... My car became slow at some point and i cant remember how or when
I changed the plugs a few months back about 6,000 miles ago , and it was a nice cool night in vegas tonight so heat wasnt the issue . No my tune isnt for the UICP but its not gonna make that big of difference is it ?

Last edited by EVOIX4me; Aug 22, 2006 at 11:29 PM.
Old Aug 22, 2006, 11:28 PM
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could be the start of a bad clutch?
Old Aug 22, 2006, 11:30 PM
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Originally Posted by precisi0n
could be the start of a bad clutch?

And thats what i orginally thought but after speaking with wartalon he said i didnt describe any symptoms of a slipping clutch , but maybe he is wrong and i do need a new clutch ?
Old Aug 22, 2006, 11:37 PM
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If you give it the gas in 5th around 2500 rpm does it slip? If so the clutch is going out.
Old Aug 22, 2006, 11:38 PM
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I will let you know in the morning if it slips at 2500 in 5th when i puch it
Old Aug 22, 2006, 11:40 PM
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Were you having the issue before the UIP?

Did you do a compression /leak down test yet? I would do one and see if it is ok. Are you running low on coolant?

Also which plugs (and gap)are you running?

Do you have an AF gage and BG?
Old Aug 22, 2006, 11:48 PM
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Yes i was having the issue before the UICP , coolant reserve tank is fine , i have never had a compression test done on my evo , maybe its time ? Spark plugs are NGK BR7ES , gapped at .024 , i dont have a af guage but do have a boost guage i am peaking at 21 psi and tapering down to 20 or 19.8 by redline or so . Hope we can get my evo fixed im tired of the service advisor at my work flying past me in his stock STI
Old Aug 22, 2006, 11:53 PM
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Originally Posted by EVOIX4me
Yes i was having the issue before the UICP , coolant reserve tank is fine , i have never had a compression test done on my evo , maybe its time ? Spark plugs are NGK BR7ES , gapped at .024 , i dont have a af guage but do have a boost guage i am peaking at 21 psi and tapering down to 20 or 19.8 by redline or so . Hope we can get my evo fixed im tired of the service advisor at my work flying past me in his stock STI


Pull the plugs to see if you are running rich, replce them they only cost a few bucks. Get a few sets of plugs and keep them in the trunk, makes it easy to swap them out.

Check the radiator to see if it is full (when cold).

I just mentioned the compression test because it is easy.

Also PM Al about your issue (I dont feel it is a bad tune) see what he says.
Old Aug 23, 2006, 03:59 AM
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Did you start getting gas somewhere else?

Think about buying a tactrix cable and getting evoscan, for 100 bucks you'll be able to log your car with your laptop and provide me (us) with a lot more data.

Also....IEXCELR8 you realize that an UICP requires like no tuning right? It doesnt change airflow enough to warrant changing any fuel or timing.
Old Aug 23, 2006, 07:04 AM
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Take it to a dyno?


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