Supercharger Running Lean

What hoses did you buy?

 

Will do. Thanks

 

You can make one or buy. You'll need a 1/8npt to an fitting for quage. Depends what comes with it.

$29 Allstar Performance ALL46110-48 (48") Gauge Line Kit, Silver

https://www.amazon.com/dp/B009Q752WE
Or anything similar I just pulled this up quickly...

 

That Amazon link comes with all of that right? Sorry if it’s a dumb question, never really dealt with any of the fittings and things that are in this thread and thanks for helping me and whoever else that may be in the same boat as me

 

The one I linked to has the 1/8 npt male and a female for the port on fuel rail and one for the gauge. Just need to see about length...
3ft will just about get you there but 4ft should work fine

 

No clue if these are the right parts so I’ll see what shows up.

 

Looks good! After testing you can install the gauge in the port. I installed an electronic fuel gauge in the port.

 

Which would be a better buy? The link you sent or what he bought?

 

Have you made AN fuel lines?
It really comes out the same if you already ordered the gauge and fitting. If Amazon is free shipping

 

Negative. Reading all of this I feel like I’m learning another language

 

Just put everything in. Confirmed idle @ 60 PSI, Regular cruising @ 60 PSI, Under load starts at 60, gradually drops to 35 before a shift then jumps back to 60 PSI.

 

Does the pressure drop correlate to the increase in afr? Have you set up to do boost referenced? You shouldn't see a drop in psi.

 

Yeah, when I got to 35Psi, I was at 12ish AFR. I’m not boost referenced

 

Seems to me like with fuel pump output isn't keeping up, seems odd with a 450 in a FFV basket tho. Who's familiar with the geometry of the FFV basket?

 

I'm non FFV. I am running a FFV canister with a Walbro 450 #267 using the FFV venturi system with no problems. Have it hot wired for 14 volts.
I'm not sure what model 450 he's running. It's my understanding only the #267 fits to keep the FFV venturi system.

 

I have the 274

 

Ding! Venturi, that's what I was thinking about and have heard you and others mention. I'd start there OP.

 

There are 2 things to try before dropping the tank. If it were me...I would do boost reference and test. Then ground out the vsv pump relay so it will give a constant voltage/increased amperage to pump and test.
How is the 450 wired in?

 

I’m not sure how it’s wired as I didn’t do the install but I remember buying the pump and the installation kit. Is there more to it?

 

I ran it on the stock wiring with no issues. It does draw more amperage than others.
Did you try any other testing?

 

No other testing. Not sure what other tests to do. With boost reference do I need a boost gauge?

 

You can try running a vacuum line from the boost port on the rear drivers side to the fpr. Plug or cap the line to intake. Post #66.

 

Are you interested in trying the grounding of the vsv relay? Try to give the fuel pump full power?
At least test with boost referencing then vsv relay.
You could ditch the walbro and try the deatchwerks pump. It'll fit and not mess with FFV venturi.
https://deatschwerks.com/products/9-307-1026?_pos=1&_sid=71fffc8df&_ss=r

 

Yeah I’m willing to try those out. Going to be trying all of them out within this week

 

From my understanding, my trucks low pressure mode was removed by forcing it into high pressure mode with the non FFV fuel lines. The relay doesn’t give extra voltage to the fuel pump for high pressure mode, it just sends it through the 60 psi regulator instead of the 43.

 

The fuel pump flow (pressure) depends on voltage, which is adjusted by the fuel pump control module based on engine load, not accounting for supercharger as this is not standard equipment. Grounding the relay faults the control module to supply battery voltage instead of adjusting the voltage. So, this makes the fuel pump operate at a higher level, ensuring you get the flow to maintain that 60PSI at the regulator. This is the next best thing to running a dedicated relay and wiring for the pump straight from the battery.

 

Not sure if this was checked but mine was pluged. https://www.tundras.com/threads/something-to-check-if-your-supercharged.62121/

 

Ffv trucks have a different fuel control module. Just switching to the 60psi regulator will cause it to be at 60psi. But the pump is not at full power. Under load pressure will fall off.
It's a quick test to see if that's your issue!
This person ran the 450 in his FFV. Tried many fixes. He finally swapped to a different pump and is running good.
Process of elimination to find what your lean issue is. Easy things first...

 

I don’t hear a click when I ground it but I hear it when I put the relay in and put. Trying it now

 

Looking back through the flex fuel truck install manual, how come it says to remove the relay?