jordan88

hi, i have a 98 civic ex coupe, with apexi catback, and it is secure with a heavy duty mount by the muffler to hold it in place. So the exhast can barely move. When I rev up to around 3500rpm, and shift, i heard this high pitch sound and if i let the clutch out faster, it would make a weird sound. Could these sounds be coming out of my exhast system?

thx

4-banging

1st at 3500rpm you hear a high pitch sound, correct? Do you have a CAI?
2nd what makes a weird sound? the clutch, at 3500rpm?
please elaborate more.

NOPD

exhaust leak?

jordan88

i checked the exhast and there is no leaks. when i let the clutch out too fast, there is some 'gron' sound.

And yes i have an aem cai with bypass valve!!

thx

DarkInfluence

It does the same thing as well with mine and I have the same car as you 98 ex. I force myself to drive like an old lady to perserve the life of my engine and tranny and I dont switch gears fast. I guess your problem is standard.

jordan88

could it be the torgue when shifting that made the heavy duty exhast mount vibrating or move?

thx

4-banging

Your funny

...but seriously, the hissing sound is prolly your CAI sucking air. If your A/C is on, the sound is more definate.

as for the 'gron' sound from your clutch :dunno:
I assuming it's a std tranny so why don't change the tranny fluid, check your clutch fluid and check your shift linkages.

jordan88

but the sound sounds like something is vibrating tho.

I changed the tranny fluid when i did my major service from hodna, and how do i check the shift linkages. by the way, i have a dc short shifter.