Abysmal perfromance of 2005 Vitz RS

[SirDigby]

it might be the issue of switching from a cable driven throttle body to a drive-by-wire system. I was disappointed with this too when I first purchased my car. do some reading on "1zz-fe throttle body swap." it makes a huge improvement in response and top end flow. it is very simple to do if you own a drill and have access to some 5mm bolts and nuts. (and a junk yard)

why are you using 0w30?

also, look inside of the air box lid. (the top) idk how they do it in NZ, but in the US there is a built in, non-serviceable charcoal filter plastic riveted to the top. take a screwdriver and pop that turd out to increase flow. there is also some good DIY's on box trimming!

[SlowVitzRS]

Originally Posted by SirDigby

it might be the issue of switching from a cable driven throttle body to a drive-by-wire system. I was disappointed with this too when I first purchased my car. do some reading on "1zz-fe throttle body swap." it makes a huge improvement in response and top end flow. it is very simple to do if you own a drill and have access to some 5mm bolts and nuts. (and a junk yard)

why are you using 0w30?

also, look inside of the air box lid. (the top) idk how they do it in NZ, but in the US there is a built in, non-serviceable charcoal filter plastic riveted to the top. take a screwdriver and pop that turd out to increase flow. there is also some good DIY's on box trimming!

Thanks for that, I will look into 1ZZFE throttle body and gutting out the airbox. My NCP61 IST definitely has louder induction noise, and is more responsive.

What is wrong with using 0w30? Most likely the car was filled with 15W40 mineral oil before hand (whatever was in the barrel at the shop that serviced it). I use 5w30 in my STI without issues (and sometimes 0w40).

I cleared out the MAF sensor (it had little bit of fluff, but nothing excessive) and went for spirited drive, which seemed better (but nothing to write home about).

BTW Vitz RS is a JDM import, in NZ they were sold as Echo (1st gen) and Yaris.

[Bluevitz-rs]

Originally Posted by SirDigby

it might be the issue of switching from a cable driven throttle body to a drive-by-wire system. I was disappointed with this too when I first purchased my car. do some reading on "1zz-fe throttle body swap." it makes a huge improvement in response and top end flow. it is very simple to do if you own a drill and have access to some 5mm bolts and nuts. (and a junk yard)

why are you using 0w30?

also, look inside of the air box lid. (the top) idk how they do it in NZ, but in the US there is a built in, non-serviceable charcoal filter plastic riveted to the top. take a screwdriver and pop that turd out to increase flow. there is also some good DIY's on box trimming!

You're mixing up your facts.

'05 was the last year for cable throttle. It wasn't until the new model in '06 that brought about all the changes to engine management including throttle by wire and emission related stuff like the charcoal filter inside the airbox.

A cold air intake frees up a LOT of power on the first gens. But you can tap a few by removing the induction pipe from the airbox. It has a small inlet restriction at the end to limit noise.

[SlowVitzRS]

Originally Posted by Bluevitz-rs

You're mixing up your facts.

'05 was the last year for cable throttle. It wasn't until the new model in '06 that brought about all the changes to engine management including throttle by wire and emission related stuff like the charcoal filter inside the airbox.

A cold air intake frees up a LOT of power on the first gens. But you can tap a few by removing the induction pipe from the airbox. It has a small inlet restriction at the end to limit noise.

Regarding fly-by-wire or not, it is definitely fly-by-wire.
Last 1st gen was made in Jan 2005 and first of 2nd gen was made in Feb 2005.
I have 2nd gen (NCP91).

As comparison between fly by wire systems, my STI is also fly-by-wire, but I have no problems with throttle response (even though it is turbo).