so im not exactly sure whats going on with my car. 99 civic si with a b18b block, and a greddy turbo kit. my problem is my car wont start with my stock ecu, but it will with a chipped p28...and when it starts with the p28 it only stays on for a few seconds and then dies. i have spark to the plugs, but we noticed that i dont have power going through the injectors. i checked all the fuses but they all look good.
i switched fuel pumps and injectors to rc 370 and walbro...they both look to be in working condition.

i cant even check my codes because it has to start before i can read it....


any help would be great....thanks alot

 

bump

 

a stock ecu and 370cc injectors would be way to much fuel.

is the chipped p28 tuned for 370cc injectors? also those might be peak and hold which means u need a resistor box.

 

lets say its peak and hold...would it start with the p28? i also am using a fmu right now, but i have blue box also

 

up

 

So... you have injectors too large for both ecus to handle - and an FMU - and a blue box? I hope like hell you aren't running ALL three types of fuel management at the same time

I'd say even if you get it running, you're headed for disaster.

Chips for Hondas are NOT like chips for mass air flow-based cars. You need to tell the ecu what size injectors are in it, as well as how much fuel to use per cell. You can usually start a car that has an air-fuel mix as lean as 16-17:1 and as rich as 7-8:1. When the o2 sensor is cold, the ecu will make NO fuel corrections, besides adding ~10% more fuel to help start the cold engine. If the chip is for 240cc's and you have 'just' 370cc's, it most likely won't start. If it doesn't, it will eventually be flooded from multiple failed starts. If you can't change injectors, can't find their size, or can't rechip it - get a v-fac and try to lean it out considerably.

As for running peak-hold injectors on a car meant for saturated injectors, you will burn out the injector circuit very quickly if you don't run a resistor box. This happened to me once: I changed injectors for someone, putting stock ones back in. I got them in, and they barely worked (only one seemed to work), even after re-chipping the ecu. After lots of wasted time, the owner remembered the old ones were peak-hold rather than saturated. Removing the resistor box didn't work, so the injectors may have gotten fucked up. I do know when I swapped in a known good set, it fired right up (after resistor box removal). Moral of the story - don't run saturated w/resistor box, and don't run peak-hold w/o resistor box.

 

im running a blue box right now...and i have a vafc2 in the car, ill try turning the fuel down

thanks for the great info

 

do u have the resistor box?

 

i dont, didnt think 370's would need it

 

its not about the size of the injectors, its the type of injectors u have. if theyre peak and hold u must use one no matter what size

 

they made 370cc in both saturated and peak and hold, so once u find out if they are or not that gets one possibility out of the way. either way 370's are to big to start the car. second u dont use an fmu with bigger injectors. its used to increase the fuel pressure when running stock injectors.

get rid of the fmu, and the vafc, chip the ecu for crome or something else for cheap. get a basemap made for 370cc injectors, or get it tuned immediately.

 

ok so we checked everything....they all look good! but we arnt getting power in the wire for the injectors....so i think its an electical problem, what could that mean?

 

bumps