2.5 " cat back install problem

SON240sx Automotive
1

i installed a apexi n1 turbo muffler cat back on my s13 today with 2.5 " piping and a magnaflow hi flow cat. . everytime i start the car i need to put my pedal to the floor … why is this?? no back pressure?? how do i fix the problem?/

2

is the hi-flow CAT directional? if so, is it possible that it is backwards?

3

it was also doing this yesterday when i had a hollow stock cat. .

i also have 370 cc injectors , walboro fuel pump and a safc corrected to - 27

if that helps

4

normally from what I have read/been told that when you hold the gas to the floor while trying to start the car that the ECU sees this as the engine being “Flooded” does not send fuel to the motor and only spark to try and get rid of the extra fuel.

Does this happen everytime you try to start the car or just after it has been sitting for a while?

5

I dont think your starting problem is related to the cat-back. 2.5 inch piping is’nt going to cause back-pressure issues. More likely something to do with the fuel and your new injectors/pump.

6

yea clearly its the safc/370cc injectors

7

Are you turbo or n/a? If you are n/a, why do you have a SAFC and larger injectors?

8

-27 correction at idle rpms? try putting it back to 0

What kind of setup do you have?

9

i have the injectors fuel pump and safc installed b/c i am doing a ka-t set up/

and yes its everytime i start the car … i have to hold down the pedal . … if i set the safc back to 0 it will allow too much fuel in the engine

how can i fix this??

10

also… this problem just occured yesterday … why would it do that now?? the injectors safc and fuel pump was installed month and a half ago … it was working fine up to now …

11

Why did you install it before installing the rest of the turbo kit? Just put the injectors back to stock, and hold onto the 370’s until you put ALL the stuff in.

12

dude, i have a turbo on my car and i run -32 to -27 correction

if your n/a i would give a lot less fuel.

13

ok but it was running fine for almost 2 months now… why would it be doing this now…

i tried unplugging the battery for the whole nite too see if it resets and still does this…

is it still ok to run if i have to start the car like this everytime???

when im driving its perfectly fine … runs strong and everything

14

this sounds like a job for…

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