kyral
01-10-2016, 08:43 PM
I just bought an Sr20det redtop (it uses coilpacks, i didnt think anything pre obd2 used coilpacks but w/e)
I went to change my plugs and noticed that cylinders 1 and 2 use red injectors (Guessing ka24de) and cylinders 3 and 4 were using a light purple injector (stock oem 370cc sr injectors)
Spark plug 1 and 2 had light carbon build up (looked good and healthy) and cylinders 3 and 4 had excessive carbon build up that left everything black on the tip of the plugs
So im thinking maybe the upgraded fuel pump is causing fuel rail pressures to exceed 3 bar. Causing the stock injectors to dump excess fuel, and making the lower flow injectors dump a seemingly more correct ammount of fuel because of the elevated fuel pressure?
Also the car kinda bogs at first if you push the gas to the floor, thats the only time it bogs is if you floor it, once its bogs though it picks up and goes (im wondering if this is caused by the ecu adding fuel thinking the engine is under boost when the turbo hasnt built up any pressure yet)
If you ease the gas on itll rev smoothly.
Any ideas what might cause the bogging
This is what ive gathered from lots of googling anyone know if this is all correct, wrong or have anything to add maybe?
http://s23.postimg.org/aquwwkvcn/syrtjtyjtjt.jpg (http://postimg.org/image/aquwwkvcn/)
http://s29.postimg.org/yiieu179f/jrtyjtyjtyjtyj.jpg (http://postimg.org/image/yiieu179f/)
I went to change my plugs and noticed that cylinders 1 and 2 use red injectors (Guessing ka24de) and cylinders 3 and 4 were using a light purple injector (stock oem 370cc sr injectors)
Spark plug 1 and 2 had light carbon build up (looked good and healthy) and cylinders 3 and 4 had excessive carbon build up that left everything black on the tip of the plugs
So im thinking maybe the upgraded fuel pump is causing fuel rail pressures to exceed 3 bar. Causing the stock injectors to dump excess fuel, and making the lower flow injectors dump a seemingly more correct ammount of fuel because of the elevated fuel pressure?
Also the car kinda bogs at first if you push the gas to the floor, thats the only time it bogs is if you floor it, once its bogs though it picks up and goes (im wondering if this is caused by the ecu adding fuel thinking the engine is under boost when the turbo hasnt built up any pressure yet)
If you ease the gas on itll rev smoothly.
Any ideas what might cause the bogging
This is what ive gathered from lots of googling anyone know if this is all correct, wrong or have anything to add maybe?
http://s23.postimg.org/aquwwkvcn/syrtjtyjtjt.jpg (http://postimg.org/image/aquwwkvcn/)
http://s29.postimg.org/yiieu179f/jrtyjtyjtyjtyj.jpg (http://postimg.org/image/yiieu179f/)