My evo9 is completely stock..I took upper ic pipe to polish it and installed it back on..and I took it to the high way all the sudden when im on 4th and 5th gear..it reaches 4000rpm then gets little bogging then jumps to 5000.. I can't seem to find the problem..am I leaking boost? help me please

 

could you explain it a lil better? if it seems like when you punch it sits there for a second then jumps up or the rpm go up and your cars mph stays the same its you clutch slipping...when my clutch first started slipping i would punch it around 3k and at 4k it would pause for a second then jump to 5k and catch again

 

He took his uicp off now his clutch is slipping? Great advice. His car is bogging, not free reving. Sounds like you have a boost leak. You now own a turbocharged car, build yourself a home depot boost leak tester. Best $10 you could ever spend.

 

Yeah just like you said..its exactly how my car is..and I only have 20000miles not that it matters..so what did you have to do? Change the clutch?

 

that sounds clutch related dose it seem to catch itself at around 5k at start to pull again if so its probably your clutch

 

yeah i get my clutch installed thursday! i ordered the exedy twin.....i've read threads of peoples stock clutch going out at 5,000 miles and less

 

Its only on 4tg and 5th..it kinda holds the boost and rpm back for a sec and releases it..

 

i just want to make sure if its bost leak or the clutch..

 

Hmm...doesn't really seem like a boost leak, as that would probably occur in every gear. If your boost is holding fine through the first few gears, I'm sure that's not it. Definately could be the clutch, seeing as how there is more of a load on the drivetrain in the higher gears, which would cause it to slip.

 

clutch

 

it occurs when i try to push the car.. im really annoyed.. car has only 20000miles
never raced or anything..i dont even use half clutch.. i had 03 evo for 3 years
and had no problems on clutch.. im so annoyed at this point.. i think imma get rid of the evo.. i cant stand it anymore

 

Don't be a baby. Your clutch is going, replace it. 20k is not that far off for a clutch going. I did get 28k on my stock with an amazing amount of 5500-6k launches.

 

If it is in fact the clutch, 20,000 miles, especially on an unmodified EVO, is very low mileage for the clutch to start going. I know other people have blown their clutches even quicker than that, but the majority will go for longer. I've got almost 50k on my stock clutch with bolt ons and it's still holding strong (knock on wood). Just the luck of the draw

 

so is it really clutch? does the warranty covers?

 

It's not the luck of the draw. All evo clutch's go out. Mine lasted 11k with minor racing. People say they don't drive their car hard but lets be realistic, we bought this car for a reason. This definitely sounds like a clutch issue. Just coincidence that it happened to start showing signs of failure when you did this.