I have had this known problem with my Evo 9 MR. Could it be a slipping clutch??? When ever I go WOT or near WOT at anything above 3000RPM, my revs hesitate and drop about 500RPM and then continue all the way to redline w/ no problem. For example I'll go WOT at about 4,000RPM and then the revs drop to 3,500 or 3,600RPM and then climbs towards redline with no further problems? Is this a slipping clutch or am I pulling timing? DOES ANYONE KNOW the answer to how to fix this well known issue? Please.. someone assist me.

 

It shouldn't be a slipping clutch. Usually a clutch slipping causes a spike in rpm. What's your setup and when did this start?

 

You need a new clutch.

 

do you have a tephra rom flashed into the car? if so, do you run no lift to shift? and if so on that one, do you rest your foot slightly on the clutch? if yes to all of them then dont rest your foot on the clutch and it should go away

 

No, i don't rest my foot on the clutch when i'm racing my evo at WOT.
I have a AMS ecu flash. It might be the clutch...?

 

It started about a year ago... I don't drive my Evo that often. I can't figure it out. I did the boost leak test and it's all good. I have no idea....

Mods / Set up:

Stock Evo 9 MR turbo boosting at like 22-25 psi on 93 pump gas.
Megan Racing Exhaust mani
Nvidia 02 housing
Helix 3" DP
Perrin Cat Delete
Greddy Ti Cat back
AEM intake
GFB Bov
AMS Intercooler with AMS LICP
AEM Tru Boost EBC
AEM Wideband
Walbro 255 Fuel Pump
NGK IX Iridium Spark Plugs
Swift Spec R springs
Front and Rear strut bars

 

Check your maf. My friend has a 1st gen and his started doing something simular to this today and one of the wire pins had come loose where the harness bends almost 90 to plug in.

 

hmm, i will look into this.

 

Im assuming u have checked all the obvious small stuff as well like plugs, injectors, etc?