ProFlo 4 small issue

[Johnnyb]

I love my proflo 4. It started the first time I turned the key and has run great since.
The only issue that I experience is the long ft is constantly maxed out.
I've run this up the flagpole on the proflo 4 forms and not gotten much good information.
Right now I've used fuel modifiers to remove quite a bit at idle and cruise and I seem to run close to my set point but still the long ft is maxed out almost all the time.
One symptom I have noticed is that on warm starts I have to push the accelerator pedal down quite a bit to avoid excessive cranking. Leaking injector maybe? How would I diagnose which one?

Thanks,
JB

 

[nvrstuk]

Can I ask what the "long ft" is? I don't run Edelbrock

 

[Johnnyb]

Can I ask what the "long ft" is? I don't run Edelbrock

Long Term Fuel Trim

 

[Shimmy]

have you tried resetting adaptations after the fuel modifier?

 

[Johnnyb]

have you tried resetting adaptations after the fuel modifier?

I am going to go back to zero, turn off auto-learn and reset fuel modifiers. Then I will turn auto-learn back on.

THX,
-JB

 

[EPB72]

Yeah i saw that on your CAT thread ,, so its trying to pull fuel away with your air fuel ratio being rich,, do you have the same thing happen at Idle, .. generally +- 6% would be Ideal fuel control,, reset and how fast does return to those #S......do you have O2 sensor voltage output data,, Id also eairlier then later would Like to know actual fuel rail pressure and make sure it compares with the data .

 

[Johnnyb]

Yeah i saw that on your CAT thread ,, so its trying to pull fuel away with your air fuel ratio being rich,, do you have the same thing happen at Idle, .. generally +- 6% would be Ideal fuel control,, reset and how fast does return to those #S......do you have O2 sensor voltage output data,, Id also eairlier then later would Like to know actual fuel rail pressure and make sure it compares with the data .

Yes same issue at idle the only time the long ft seems to be normal is under hard acceleration.

I don't have O2 sensor voltage at the moment, and I don't think that's available in the Edelbrock app. I suppose I could rig up some sort of a pigtail and monitor that data while driving.

I have a mechanical gauge on the fuel pressure regulator which is vacuum referenced and it matches up pretty exactly with what's shown in the application. 34 to 36 PSI at high vacuum and 44 to 45 PSI at low vacuum.

-JB

 

[EPB72]

Yes same issue at idle the only time the long ft seems to be normal is under hard acceleration.

I don't have O2 sensor voltage at the moment, and I don't think that's available in the Edelbrock app. I suppose I could rig up some sort of a pigtail and monitor that data while driving.

I have a mechanical gauge on the fuel pressure regulator which is vacuum referenced and it matches up pretty exactly with what's shown in the application. 34 to 36 PSI at high vacuum and 44 to 45 PSI at low vacuum.

-JB

pull the vaccum hose off regulator is there any fuel there a leaky diaphram happens not to common,, ,, only played with pro flow 4 a couple times so not to familur but OE stuff all makes work on everyday,,So the map sensor is your engine load indicator? does data have engine load PID,