i usually run an hks downpipe to an open 3" cutout or bolt up the restrictor plate so its hks dp-->UR Test pipe-->stock exhaust...well with the exhaust shut it makes a strange rattling on decceleration...and a wierd vibration after like 3k ...i thought the balancer was maybe 180* out, the shop looked at it and said it was fine...they put the car on the lift and the sound was coming from where the cat and dp meet...i opeded the exhaut and the sound went away...could the extra exhaust pressure be somehow making this noise or is the shop screwing me and the balance shaft is really off?


I also have a CEL now, and ive never had one before

 

Ttt

 

noise continued after the exhaust was open...brought it back and made him redo the balance shaft... FIXED!!! i love these 264s and there not even tuned yet

 

I had HKS 264s and had a P0300 light and lots of valvetrain noise. For whatever reason, when installed GSC cams (272/264) the valvetrain noise and P0300 are gone! I am still not tuned for them, but they feel strong.

 

thats good evotexas...i have a set of GSC 264s for sale... I was going to install them but i got last minute fears and bought a set of HKS...im happy with the hks, but maybe i shoulve just put in the gsc's...i dont have any sort of tuning yet either but the cams still make the car pull alot harder around 5~6k...very happy

 

I am beginning to wonder if it was the valvetrain noise that was tripping the nkock sensor.....

 

are you 100% sure it was valvetrain noise...did you or the installers bleed the lifters...my car didnt need it, but i kno some do

 

that's messed up

 

Yup that makes me wonder. Either I have to bleed my lifters, or get GSC cams.

 

That's just stupid. The hks and gsc cams are EXACTLY the same. same lift and duration. The 4g63 is noisy and always has been. How can one cam, with the same lift and duration, make more noise than another?

 

They are not EXACLTY the same just because the lift and duration are the same. There are other specs to cams you know.

 

My engine used to make noises when it's cold outside, but it's stopped recently since the weather is warming up.

 

be careful...the balance shaft noise heard under loud exhaust could definitly be mistaken as a lifter noise...loud quick rattling under decceleration...I KNO for a fact that front balance shaft/ oil pump gear has a trick to align it and unless u or the installer arent experienced mith mitsu then it can easily be messed up and even still look aligned at TDC... i thought mine was a lifter noise too until one of my friends with alot of dsm exper. took a ride...then again, if you only installed cams that shouldnt have been touched, but i had my timing/ balance belts done too...