hey everyone I have 03 evo VIII with 24,000 miles on it. i have few mods, i have this weird hesitation problem it happens no matter if im stepping on it or just half throttle. It will be fine to about 4 grand then it drops to about 3,800 and then slowing kicks up like lag. so basiclly it drops then hesitates like lag. i dont think its lagg i watch the boost gauge and it seems right it hits 19 and then drops off to about 16-17. people told me its the clutch but it doesnt feel like its slipping. another friend told me it was my coil pack or something with igniton. please help if you have any info im confused.

 

Sounds odd, read the thread "clunking noise behind the glovebox" search for this. good luck!

 

thanks

 

We will be here to help you all the way. Try what is on that thread, if it doesn't help, ask away some more questions. Good luck.

 

Do you have an aftermarket BOV?

 

how do i find that thread i searched it and it didnt come up

 

yea i do i have greddy type s

 

Click on my avatar "my car", then click: Find all posts by smokedmustang, then look for the glovebox thread, or any other misfire thread I did. Good luck again.

 

ok

 

same thing happened with my evo it would reach 4000 rpm and then drop down to 3500 rpm and then continue to go back up , got it checked out and it was my clutch. sounds like the same thing is going on with your evo I would have it checked just to make sure

 

yea a bunch of ppl are saying its clutch but it doesnt feel like its slippin and i can launch it perfectly

 

There's no way for your rpms to go down while accelerating unless your clutch is slipping, which means it's going up artificially, then when the clutch catches fully, the rpms go back to normal. A slipping clutch wouldn't affect a launch, because that's at high rpm. The clutch slips at peak torque, which is down at 3600-3800rpm.

In order to confirm that it is or is not the clutch is this:

1) Go out on the highway
2) Get to around 50mph
3) Put it in 5th gear at low rpm
4) Floor it
5) At the moment your boost hits fully (low 3000s), if your rpm shoots up artificially without you actually accelerating much, then falls back down, catches fully, then accelerates again normally, then it's your clutch.

 

thanks ill make sure i do that

 

I also had very similair issue last week and found it to be a combo. My rubber gasket on my type s bov was leaking so I swapped it out with a friends. Not much changed even though it was leaking so I changed my plugs to NGK BPR8ES's and put gap at .025. Apparently when I increased my boost past 18 lbs the NGK Iridium 7ES's were not enough. Try this and good luck.

 

yea i just put iridiums in but isnt that what come stock on the evo