problem with injectors

[bucknasty88]

OK i just installed some 36 pound injectors to my car and started it up and it just wont run. it wont even idle...that is the only thing fuel wise thats been upgraded..### help what is up with it?

 

[cs82685]

OK i just installed some 36 pound injectors to my car and started it up and it just wont run. it wont even idle...that is the only thing fuel wise thats been upgraded..### help what is up with it?

well if that's the only thing fuel wise, then you are drowning the car with fuel and that's why it won't run, with injectors that size your gonna want an idle fuel pressure of about 18psi, stock is 47, so if you can't adjust the fuel pressure then your car's not gonna run

I'd say it's time to invest in a fuel setup, sfmu, portfueler, MSnS, it's decision time

 

[bucknasty88]

ok thanks...thats what i figered..if i get a regulator would i be able to run them then or what else do i need?

 

[cs82685]

ok thanks...thats what i figered..if i get a regulator would i be able to run them then or what else do i need?

minimum you're going to need is

walbro 255

vortech sfmu (not a regular 1:1 regulator like the 4g63 guys)

check these two pages out

http://www.2gnt.com/index.php?d=SFMU Installation Diagram
http://www.2gnt.com/index.php?d=About the SFMU

 

[bryanwheat]

the vortec, and a walbro 255 wil not let him run these injectors.

The fmu is for taking advantage of the stock injectors, by upping the fuel pressure 12:1. IT isn't in any way going to make it so that he can run his larger injectors. You need some form of fuel control, like a way to change injector deadtime.

 

[BigRand]

the vortec, and a walbro 255 wil not let him run these injectors.

The fmu is for taking advantage of the stock injectors, by upping the fuel pressure 12:1. IT isn't in any way going to make it so that he can run his larger injectors. You need some form of fuel control, like a way to change injector deadtime.

He's talking about the SFMU (S= super) that allows the user to control his idle fuel pressure as well. As raise it up under boost just as a regular fmu would depending upon what size disc is in ther. Its well documented that it will work.


With a 36# injector setup, he might be able to run a regular 1:1, and get the car to idle correctly, its a matte of him having enough fuel at the top end.

My suggestion to you is, if you don't plan on boosting over 9psi, go back to stock injectors and go with a 12:1 fmu, and walbro 255. For simplicity.

No matter what you do, a walbro 255 fuel pump should be next on the list if it hasn't already been bought.

 

[VelocitàPaola]

By the way, this may not have anything directly to do with your problem, but I recall you PMing me a few times about an FCD. Did you ever get one? Running without one on your boosted N/T is a bad idea...