FIC 850 Injectors marked wrong?

[SleepingTsi94]

I purchased FIC 850s a while back and have never been able to get them dialed in. When using v3 ecmlink with gm maf the maf comp table was always negative and never stayed the same from drive to drive. So I switched to Speed Density and was dialing them in again and it still went negative -26 on the fuel trim. So I changed the global to -55 and 275 deadtime which would assume they are 1000cc injectors. Everything began to clear up. I'm running base 1g fuel pressure and I tested my resistor box and tested fine. So has anyone else ran into this problem? Possible they are marked wrong?

 

[SBR Joe]

I purchased FIC 850s a while back and have never been able to get them dialed in. When using v3 ecmlink with gm maf the maf comp table was always negative and never stayed the same from drive to drive. So I switched to Speed Density and was dialing them in again and it still went negative -26 on the fuel trim. So I changed the global to -55 and 275 deadtime which would assume they are 1000cc injectors. Everything began to clear up. I'm running base 1g fuel pressure and I tested my resistor box and tested fine. So has anyone else ran into this problem? Possible they are marked wrong?

It may lie in the fact that youre running base 1g FP. FIC injectors are flow tested at 43.5psi so if youre running less than that, theyre not flowing the full 850cc's.

 

[SleepingTsi94]

So then why would it always want to take fuel away it would be delivering less.

 

[SBR Joe]

Actually my bad for not noticing this.

Your global fuel maps should be -47% for 850s.

450/850= .5294

.5294-1= .47


Is that what it was before you went to -55? I was thinking backwards, if the BFP were the case, you would have had to been adding fuel to compensate, taking it out would have just made it even worse.

Also, are these the STFT's youre logging? Or the Long term lows/mids? Ever try to add some airflow on the airflow tables to bring these back? If this isnt the STFT that youre speaking of, have you logged the short term fuel trims and raw airflow in HZ to see where its dipping down so low at?

 

[SleepingTsi94]

Combined fuel trims. my maf comp sliders never went positive

 

[SBR Joe]

Combined fuel trims. my maf comp sliders never went positive

Hmm, it is possible i suppose, youll never know unless you get them flow tested though.

As long as your air fuels are OK with pulling that much fuel out, then id say just do what you need for it to work mang.

 

[dsmvenge]

So I know this is old but Im having the same issue did you figure it out

 

[Geier]

Boost/intake leaks?