Easy fuel tuning.
Posted: Tue Sep 27, 2011 11:18 am
Been playing around with a few different thing for tuning the city and this is the easiest method iv found so far.
Requires:
Rising rate fuel pressure reg.
1X 1way check valve.
Manual boost controller.
Fuel cut defender (pot type recommended)
Vac pipe.
First you want to hook up your fuel cut defender, The pot (potometer) type is best since it doesn't just keep the voltage the same instead it stretches it (which would be unwanted with no tuning since then youll start getting lean at 14psi and stay lean until it reaches fuel cut. But with the raising rate fuel pressure reg its good because it removes some fuel and still lets you keep the cut off.
It is installed ether by the ecu (light blue wire) or by the map sensor on the same wire.
Next you want to install the raising rate fuel pressure regulator.
This is installed on the fuel return after the stock regulator.
Then you want to hook the manual boost controller up the the vac line for the raising rate fuel pressure reg.
Bleed more boost off with the boost controller to give less fuel.
The check valve is there so you dont bleed any vac off.
The 3 way splitter also has a restrictor in it and it came with the boost controller.
I have the fuel cut defender set to 21psi.
with out any added fuel it starts getting lean at 13psi.
With the fuel pressure reg running with out any air bleed it gets very rich between 6psi and 13psi. Then it quite rich up till 16psi.
With a small amount of air bleed (3 clicks) it fixes the rich spots since it lowers the boost reading a lot when there low pressure. But its still a bit rich between 13 and 16psi. But from there till 20psi its spot on.
Still doing more testing so will post up more details later on.
Requires:
Rising rate fuel pressure reg.
1X 1way check valve.
Manual boost controller.
Fuel cut defender (pot type recommended)
Vac pipe.
First you want to hook up your fuel cut defender, The pot (potometer) type is best since it doesn't just keep the voltage the same instead it stretches it (which would be unwanted with no tuning since then youll start getting lean at 14psi and stay lean until it reaches fuel cut. But with the raising rate fuel pressure reg its good because it removes some fuel and still lets you keep the cut off.
It is installed ether by the ecu (light blue wire) or by the map sensor on the same wire.
Next you want to install the raising rate fuel pressure regulator.
This is installed on the fuel return after the stock regulator.
Then you want to hook the manual boost controller up the the vac line for the raising rate fuel pressure reg.
Bleed more boost off with the boost controller to give less fuel.
The check valve is there so you dont bleed any vac off.
The 3 way splitter also has a restrictor in it and it came with the boost controller.
I have the fuel cut defender set to 21psi.
with out any added fuel it starts getting lean at 13psi.
With the fuel pressure reg running with out any air bleed it gets very rich between 6psi and 13psi. Then it quite rich up till 16psi.
With a small amount of air bleed (3 clicks) it fixes the rich spots since it lowers the boost reading a lot when there low pressure. But its still a bit rich between 13 and 16psi. But from there till 20psi its spot on.
Still doing more testing so will post up more details later on.