Changed injectors and pump = NO Start (EMS)

[TurboTJ]

I just finished installing my new FIC 1050's, dual pump setup, FPR and -8, -6 line. Before I start it, I have the pressure set to 43.5PSI at the rail. It cranks but doesn't start.

To recalibrate the EMS, I entered the following.

OLD injectors
450 @ 43.5PSI <<(I assumed that they were rated at base fuel pressure)

New injectors
1050 @ 43.5PSI

Any ideas? I am showing -2.45PSIg load which makes since for the altitude. I am running a speed density setup.

Are there any good write ups on setting fuel pressure?

Thanks for all the help!

 

[alex1090]

The pumps are running? Making good pressure and all that good stuff??

 

[TurboTJ]

Yes, I am showing 43ish at the rail. I pulled a plug after cranking it and it was wet, so I am confident that the fuel system is working.

 

[alex1090]

I would have to say check over all the basics first. Check spark, pulse width etc..... Does it pop at all or just nothing?

 

[TurboTJ]

pretty much no signs of life. I am thinking that it might be running to rich. I just installed the EMS to make sure that it works on a stock setup and then I installed the fuel system. So it never ran well on stock settings and even then took quite a bit of cranking to start. Guess I should have tuned it perfect there before installing the new fuel system.

Thanks for the help!

 

[Kevin Jewer]

Is this an AEM? Start by cutting the initial crank pulse in half, and see if it starts. It may take some cranking, give it a little time. If that helps, adjust from there. If there is no change, cut your crank inject time in half, and go from there. Tuning the start parameters can be a pain in the ass, but to make it easier, just go for the least amount of fuel that will quickly and reliably start the motor. You can play with a big initial shot or higher cranking fuel.