HIGH Injector Duty Cycle is WAY too high

[RMeadows]

I have FIC 850's and am seeing 96% duty cycles at 23 pounds on my EVO3 @ 6500rpms...obviously not possible. I also noticed that from 4500RPM and up my MAFS is pinned at 1599hz. Boost leak, or could it be something else? I have a tester but don't have access to a compressor right now. any suggestions? I used the tester with a bike pump and got it up to about 10psi, didn't find any leaks

maybe pop off the intake pipe at a gas station and use the tire air thingy there to pressure test it real quick and at least locate the leaks?

 

[just2asian]

what are you using to log or tune it? If your using DSM Link did you make sure to set the dead and global time to a base number to begin with?

 

[kspharris]

He is using DSMchips and a maft. Did you just use the DSMchip to get your tune or have you been using the maft? Did you just install the maft? Let us know.

 

[RMeadows]

He is using DSMchips and a maft. Did you just use the DSMchip to get your tune or have you been using the maft? Did you just install the maft? Let us know.

no i've always had the MAFT. the chip is setup for the 850s and i've done the fine tuning with the MAFT. all my fuel trims are in line and good and have been for many weeks aside from my low trim which for some reason is either maxed all the way lean or all the way rich depending on whenever i happen to glance at my logger to take a look at it, still haven't figured that lil gremlin out yet

 

[JayRolla]

Boost leak, and the 1g logger only reads up to 1600hz.

 

[RMeadows]

Boost leak, and the 1g logger only reads up to 1600hz.

1606, or so i thought. but that's besides the point. i was just stating that the hz shouldn't be that high that early. that's a lot of flow.

 

[JayRolla]

You running 23psi, thats way more than 1600hz. 1600hz is nothing.

 

[CanadianTSi]

Your probablem would be a combination of a boost leak and your MAF-T being out of calibration like they all are...