Fuel return line?
#1
Fuel return line?
I have an 07 suburban 5.3, when I did my supercharger I only remember seeing a fuel feed line going to the engine nut wanted to be sure if anyone can help is this fuel system a returnless system?
thanks in advance
thanks in advance
#3
Thank you, I have this idea to run a separate fuel cell for e85 ( only cause there is nowhere near me that carries it for me to run it on a daily basis) , any idea where the sensor is ? I peaked around and couldn't see it
#4
TECH Senior Member
iTrader: (2)
Doesn't exist.
They never came with real alcohol sensors, they used virtual flex fuel that uses fuel trims to determine a change in alcohol content. It's a rather poor way of doing it and very slow to respond.
You'll have to buy a GM (continental) sensor, pigtail, wire it into the PCM and plumb it into the fuel line. Then it can be enabled in the tune. Just remember that it does require about 20-30% more fuel flow, so the injectors need to be large enough. The stock flex fuel pumps should handle around 500hp on gas.
They never came with real alcohol sensors, they used virtual flex fuel that uses fuel trims to determine a change in alcohol content. It's a rather poor way of doing it and very slow to respond.
You'll have to buy a GM (continental) sensor, pigtail, wire it into the PCM and plumb it into the fuel line. Then it can be enabled in the tune. Just remember that it does require about 20-30% more fuel flow, so the injectors need to be large enough. The stock flex fuel pumps should handle around 500hp on gas.
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68Formula (08-23-2022)
#5
Ah that makes sense since I literally couldn't find anything on the sensor, and fuel system is next im already maxed out with what I have, my plan was to do 127lb injectors, 520 pump in the tank, then separate cell for e85 with external pump and tie them in at the sensor and run both pumps off toggle switches
#6
TECH Fanatic
Buy the DSX flex kit. It is easy.