Lean full throttle

[Mopar493]

Update! My fuel delivery problem is solved. I switch to a new pump, change the regulations to after the fuel rails and put the 10 micron filter closer to the fuel rail inlet. Now it hold pressure at wot and when i hit the throttle Afr go right away to 12-12,5. It feels in the seat it get what it wants now. Running really good allower with map 5037 and i have not give it much learn time yet.

[Mopar493]

Is that with modifiers at 0?

also fuel pressure @ 58 psi ?

Yes modifier at 0 and fuel pressure at 58psi, vacuum at idle brings pressure down to 54psi

[Mopar493]

I ran out of gas at a fuel station once.......it sputtered as I turned into it.
Put gas in it, and the fuel pump died at the pump....$250.00 tow bill, $187.00 fuel pump.

When I put the new fuel pump in the tank
I tweaked the sender unit so empty on the gauge actually means I have a little more 6 gallons in the tank.

The time I ran out of gas in the middle of the street, and at the same time the starter decided to pack in is a different story.

Im sorry that happened to you.
That could be it, i ran out of gas in the middle of the road due to the level gauge show i had enough but the tank was empty, before i realized the tank was empty i try to start and the pump prime dry and so on. It could have been a bit damaged of that and can not keep up at accelerating.

[2700 Cast]

Short ft at idle -1

Is that with modifiers at 0?

also fuel pressure @ 58 psi ?

[Mopar493]

What is the Short fuel trim at idle with MAP 5037?

Short ft at idle -1

[BITE_ME]

I ran out of gas at a fuel station once.......it sputtered as I turned into it.
Put gas in it, and the fuel pump died at the pump....$250.00 tow bill, $187.00 fuel pump.

When I put the new fuel pump in the tank
I tweaked the sender unit so empty on the gauge actually means I have a little more 6 gallons in the tank.

The time I ran out of gas in the middle of the street, and at the same time the starter decided to pack in is a different story.

[2700 Cast]

What is the Short fuel trim at idle with MAP 5037?

[Mopar493]

Go back to 5029 MAP after you repair your Fuel delivery issue.

Take a 1 min or less video at idle/accelerating.

15 min videos , are too distracting.

Ok, do you see something wrong with 5037 map? Otherwise 5037 suppose to match my size of engine and the vacuum the system reading, 14-15 hg/inch. I know i had 18hg/inch hot idle with carb and stock distributor 18 initial timing and full manifold vacuum bring the timing up to 30 at idle. This setup is something different but i have not check hot idle vacuum with a gauge on Pro flo 4.
Im going to try what fleet man sugested and regulate the pressure after the fuel rails, feed and return hoses should not be a restriction, AN 8 both. The pump is a Walbro dscc 39/50 400lph and should keep up well, i have be very meticulous with all the wiring and im using 10 gauge wires to the pump and its wired like instructions say with a internal diod 40 amp Bosch style relay and the voltage not go under 13,9 even during acceratate and 6,5 feet 10 gauge wires should not take away much voltage. Maybe something strange fault with the pump but i try regulate after fuel rail and put a new high flow 10 micron filter close the rails and maybe switch the pump to a new Walbro gst 450 pump, if this not help i dont know what to do.

[2700 Cast]

Go back to 5029 MAP after you repair your Fuel delivery issue.

Take a 1 min or less video at idle/accelerating.

15 min videos , are too distracting.

[fleet man]

Thanks fleet man!

your welcome and good luck

[Mopar493]

thank you . this system is based on the gm t p i witch used a fixed fuel pressure regulator so you have full pressure and regulated on the return 17400 and 17401 one is 58 p s i check summit

Thanks fleet man!

[fleet man]

Ok, yes its maybe the regulator, only loose pressure at accel. I thinking of the pump first, i run out of fuel one time on the road bec of a wrong showing fuel level gauge that show that i had fuel but doesnt, the tank was empty and i run/prime the pump dry once. But its running great otherwise, normal driving. By the way you had right about 5037 map, thank you.

thank you . this system is based on the gm t p i witch used a fixed fuel pressure regulator so you have full pressure and regulated on the return 17400 and 17401 one is 58 p s i check summit

[Mopar493]

get the eledbrock fuel pressure regulator for the fuel rail it would fix this.

Ok, yes its maybe the regulator, only loose pressure at accel. I thinking of the pump first, i run out of fuel one time on the road bec of a wrong showing fuel level gauge that show that i had fuel but doesnt, the tank was empty and i run/prime the pump dry once. But its running great otherwise, normal driving. By the way you had right about 5037 map, thank you.

[fleet man]

Heres a Youtube video from todays driving with map 5037, it have not any learning time yet more than about a few minutes, you see a few minutes in the movie when i give it some throttle, fuel pressure drop and AFR lean, you can here the sound of engine to.
https://youtu.be/ayidbrIw2Zk

get the eledbrock fuel pressure regulator for the fuel rail it would fix this.

[jm73340]

Agreed, you need to figure out the reason for the drop in fuel pressure.