FIC Injector Data

[ferocity02]

Can someone look at this tune file and see if the injector data is entered correctly (disregard the rest of the tune, its from a stock Silverado, just want to see if I'm doing the injector data correctly). My fuel trims are going max negative on decel no matter how much I reduce the MAF table. My tuner thinks I'm hitting the minimum pulse width of the injectors/data. The IBPW PID shows ~1.77-1.81ms during decel, and ~2.15 at idle. My tuner said he's never had to adjust the minimum pulse width, small pulse adjust, etc of the injectors.

It's an '01 Silverado with the stock manifold referenced FPR (around 58psi with reference line disconnected) and FIC Bosch 60# injectors at 3 bar. The data they sent they scaled for me for 4 bar.

Thanks!

[O1Z06]

I think your hitting the PCM limit B9021 which you can't adjust without the .cax.

[ferocity02]

I think your hitting the PCM limit B9021 which you can't adjust without the .cax.

I have the cax and B9021 is set to 0.896ms, which hasn't been changed from the stock value.

[O1Z06]

I used the min pulse in B9021 and fixed the rich decel.

[ferocity02]

I used the min pulse in B9021 and fixed the rich decel.

Could you tell me a little more about what you did? What is yours set to?

[O1Z06]

I set it to the min pulse width from B4003. Have a look here http://forum.efilive.com/showthread....ighlight=b9021

[ferocity02]

I set it to the min pulse width from B4003. Have a look here http://forum.efilive.com/showthread....ighlight=b9021

Thanks! Read through that earlier today and talked to injector dynamics, and decided to set B9021 to 0.12ms, same as B4003 and B4003, and it helped a little bit. My pulsewidths on decel now get down to 1.55ms, but the fuel trims are still going max negative. The logged pulsewidths are still flattening out on decel so I think I'm still hitting a lower limit. Attached log is from this afternoon with this change.

[O1Z06]

You're running a MAF? Can you try OLSD COS3/5?

[ferocity02]

You're running a MAF? Can you try OLSD COS3/5?

Yes, still using the MAF within it's limits. I think the plan is my tuner will finish up my 1 bar MAF tune and then I'll go to 2 bar COS on my own. I hear going to COS is simple.

[BLK02WS6]

So, are you cutting down the VE table in the decel area and it won't lean out?