Aveo fuel system

MMamdouh · Post by **MMamdouh** » Sun Nov 30, 2008 7:52 am

i can't remember at which post i was asked to confirm if the aveo have return less fuel system so here it goes... the aveo does have a return less fuel system indeed

i have checked dad's car 2 days ago and the fuel rail have no outlet... just an inlet from the pump and thats it, i didn't even see a fuel pressure regulator installed

that will make me ask 2 questions:

1- how can this car maintain appropriate fuel pressure as the running conditions change (different RPMs and so)

2- how to put a RRFPR on that car when you put a turbo or so??

MMamdouh

Daniel · Post by **Daniel** » Sun Nov 30, 2008 11:33 am

R1: I believe that the pressure regulator is now integral part of fuel pump inside tank and that engine management adjust only injector timing.
No aswer to Q2

.

GsiTurbo · Post by **GsiTurbo** » Sun Nov 30, 2008 4:40 pm

Yes, Daniel is correct. On the returnless system fuel pressure regulator is a part of a fuel pumo. To answer the 2nd question...I guess a modification to the internatl fuel pressure regulator is required. Alternatively, conversion to a full return system.

gse_turbo · Post by **gse_turbo** » Sun Nov 30, 2008 9:19 pm

I wonder if the fuel pump (complete assemblies with barb fittings) from another Daewoo would be able to be swapped into the tank of the Aveo. ...ore if any of the non-US spec Aveo and what not came with a return system?

GsiTurbo · Post by **GsiTurbo** » Mon Dec 01, 2008 4:31 am

In some markets, Aveo was available with 1.5 SOHC motor. The photo of its motor is below, but I can't tell for sure if it features returnless, or full return fuel system.

MMamdouh · Post by **MMamdouh** » Fri Dec 05, 2008 8:38 pm

the aveo came in Egypt with the 1.5 SOHC... and it has return less fuel system

MMamdouh

Post by **PrecisionBoost** » Sat Dec 06, 2008 12:27 am

There are a few options..... I know of one system that adjusts the voltage going to a secondary inline pump.

So the first pump drives the fuel pressure up to 45psi and the second pump then increases that fuel pressure to what ever you want.

Most of the systems are expensive.... they measure fuel pressure electronicly and adjust the voltage to the second fuel pump to give you the desired fuel pressure.... some have "boost" reference so you can make it a rising rate system.....some are two stage.... you run say 50psi regular pressure and when you hit a button it jumps up to 70 psi ( designed for dry nitrous kits )

I looked into a few designs a few years back.... most were $700 or more.... which probably costs more than changing the system to a return based fuel system.

As it turns out.... the one I liked... which had an adjustable fuel pressure "map" that is adjustable via laptop was something crazy like $3500 USD

xiaogary · Post by **xiaogary** » Sat Dec 13, 2008 2:03 pm

Yes. Aveo fuel pressure regulator is together with the fuel pump assembly which is submerged in the tank. To access it, you have to open the circular cap under the passenger seats (rear). There is 2 pipe on the cap. One is fuel pump output through a fuel regulator, one is the return line into the tank.

The flow of the return is not from the front engine. It come out of the fuel tank from fuel pump through regulator (fix pressure not adjustable), to a fuel filter at the exterior near the right wheel beside the wheel well, and from there return back to fuel tank at the 2nd pipe after passing the fuel filter.

I had since changed the fuel pump to Walbro 255l/hr fuel pump, and poked straight through the fuel regulator such that its a dummy now (just a pipe). Then I run the fuel pump line, throught the dummy regulator to the front engine bay which is connector to a SARD fuel regulator (adjustable set at 55psi at idle), Then the return line is return back to the fuel tank at the 2nd pipe.

gse_turbo · Post by **gse_turbo** » Sat Dec 13, 2008 6:58 pm

Very good!