1zz injectors suit the S/C just fine

[LtNoogie]

Today I installed a set of 1.8L 1zz injectors that I bought off of eBay because the tC injectors that I have been using are causing CELs for a rich condition every time I start the car.

The next picture is of the blue 1zz injectors (PN 23250-0D050) going into the fuel rail to replace the grey tC injectors. The stock injectors are PN 23250-21040. There's got to be a way find the specs on these two injectors.



Previously, when I was on the freeway and at WOT, my wideband gauge bottomed out at an AFR reading of 10 because it could not go lower. With the 1zz injectors, the AFR at WOT now reads 11.3 on the wideband.

The following picture is of the data I logged. At WOT, ignition timing remained nicely in the double digits (here showing 16 degrees). AFR on the data logger bottoms out at 12.03. When I was running lean, I was getting an AFR reading of 14.9 on the wideband and ignition timing was down in the single digits around 8. Perhaps a little water/meth injection to cool the mixture and I'll get ignition timing up in the 20's again, which is what is is when boost is turned off.

Isn't tuning fun?




BTW, If you're going to do this, you can save yourself some future headaches by sawing off that nub that blocks the fuel rail from coming off. Taking off the valve cover to change the fuel injectors is not difficult but a PITA. With the nub off, it took a half hour from start to finish.




Here are the injectors I bought.