will a throttle body spacer work with a k and n intake system on a 1997 2.7 liter

 

I dont see any reason it wouldnt, I only found a throttle body spacer for the 3.4 though.

 

would a throttle body spacer and intake cause a code for too lean bank 1? I got that code immediately after I installed my intake and throttle body spacer.

 

What engine code you are getting and year of your 4runner? Do you hear whistle?
A close buddy here got good deals on K&N from 4WheelOnline.com and got the same code, we removed the TBS, put the stock back with decent seal and clear code, it works perfectly now.