Martin220d

Going ordering a K&N Typhoon cold air intake tomorow for my 2006 IS250.. I'm sure the ECU is self learning when it comes down to this so my question is to stop it running sloppy, idling oddly, am I best to disconnect the battery at time of intake replacement and leave it for a while and then drive to help it relearn the new system?

Reason I ask I did a temporary test to mimic an intake upgrade by removing the air filter in the box and ran it for about 10 miles to see how it deals with upgrades and it ran quite sloppy.. This was only an experiment, so this leads me to believe the ECU should relearn itself once battery is disconnected and a new unit plumbed in..

Any input to this? Does it really free up any lowdown torque, does anyone feel much improvement and coupled with a custom exhaust system with deleted resonators, revised pipe work and rearboxes, is there much gains to be had?

It's a well looked after motor as-is for a 2006 with a full Lex/Toyota service history and 74k miles on the clock.

Aspect

Yeah resetting the ecu via the battery is recommended with the intake install, whether it gains any real power gains is negligible. My car after the F Sport intake was definitely louder with induction noise but wasn't any faster, was to be expected since it was only rated for ~5hp. Intake mods for the 2IS barely get you any gains until you move onto the ISF

Martin220d

Figured as much. an ISF would be a nicer motor alright but considering the price of a 2008 ISF over here in Ireland, ones for sale at 22,000 euro which is equivalent to 27,000usd it is quite expensive.. and running costs yearly road tax is 1,800euro (2,215 usd) (or quarterly per 3 month of 511 euro / 630usd) its nuts. and the IS350 didn't make it here.. only 2 options, an IS220d turbo diesel which I own one of these to, that give alot of injector/dpf trouble)

Was thinking the Fsport one but to be honest they both look very similar setups.. Probably sounds alot better than a stock airbox setup and frees up that V6 grunt..

Aspect

The K&N typhoon intake is definitely a great sounding intake, prob the loudest for the 2IS. I only mentioned the ISF because RR racing actually developed an aftermarket MAF air box which apparently puts on 10-15 hp additional with a tune which is the largest I've heard of for this platform

jr4div2

One question related to your "running sloppy" and "idling oddly". Have you ever had your intake valves cleaned. If you're having idling problems on your 2006 IS250, I'm thinking you got to have some serious carbon build-up.

Martin220d

Oh I don't have any at all.. just did that when I whipped out the air filter and cover to mimic an upgrade.

Car runs A1..