When I'm accelerating quickly, but not WOT, I'm shifting anywhere between 3500 and 4500 rpms. When I push the clutch in the rpms jump up 500 to 1000 rpms and then drop. I'm not leaving my foot on the gas, so thats not it.

Is this something everyone experiences? I have a MBC, and APS BOV.

How can I tell if I have a boost leak with a boost gauge? Someone told me that the APS bov's are known to leak.

You find a boost leak with a boost leak tester - the gauge has nothing to do with it. No, APS BOV's are not "known to leak," so that "someone" should become a "no one."

There's no reason for your RPMs to go up that high, and I frankly don't see how they could even have time to shoot up that much unless you take 5 seconds to shift each time. You should probably check your throttle cable if the RPMs go up when NOT touching the gas and when NOT IN GEAR, because that shouldn't happen. If the RPMs shoot up when accelerating in that area, then it's the clutch, but that isn't how you described the situation.

No, I don't take 5 secs. to shift, but I don't quickly throw it gear either. Its only when I shift while accelerating quickly. If I'm in say 2nd gear, I can hold it steady at 4000 for a few secs. and then shift, it won't do it. Only while accelerating.

Sounds like momentum of the flywheel from letting your foot off the gas a split second after depressing the clutch.

Ok, I just took it out for a few tests. When the rpms jump like that, there is no blow off sound. When it doesn't jump, the blow off is a quick snap or sneeze.

rpm jump = no bov snap or sound is low
no rpm jump = quick bov snap

Out of curiousity, what is this bov flutter.

My friend has a stock 8 dv laying around. I might ask him if I could use it for a few days to see if this jump stops with it in. BTW I bought the car with the APS in it.

Listen to this man, he is smart, or your still depressing the gas pedal for a split second after you release the clutch.

I think Warr is on to somthing here mine VIII used to keep rpm or slightly raise between shifts onlywhen getting on it hard. It has not done it since I replaced the clutch and flywheel

Ok. Thanks guys. Its not a big deal or anything. It's just annoying. I'm not leaving my foot on the gas for a split second. I tested that theory last night.

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Clutch pedal sensor disconnected? I know that causes the symptoms you are describing.

Would that be located down around the clutch pedal under the dash?

My problem is the like the one discussed in this thread: https://www.evolutionm.net/forums/sh...d.php?t=217084

I had the same problem and i swore i was not still touching the gas for a split second...but guess what i was my foot did not leave the pedal completely in time. befor i depressed the clutch....It was all about the timeing...you will get it.... it just takes time, you will then become one with the EVO!!!!!

Well I was more asking if you removed it knowingly and didn't know it could cause the issue you're seeing. I doubt it just fell off. =)

I think there's a how-to for disconnecting it, but yes, the plug is under the dash near the pedal.

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