hks fcd

Paddy

Paddy

Lifer
can anyone tell me which way round the wires go to plug the hks fcd to the map sensor. which colour wire goes to the plug and which colour one goes to the other half of the wire. also what will i need the set the fcd to for ruinning .9 boost and 3 bar fuel pressure. cheers
 
Paddy

Paddy

Lifer
cheers. can anyone tell me a bit more about adjusting it. i thought u just plug it in and it takes out the fuel cut. cheers
 
NDR008

NDR008

Fresh Recruit
It also messes up the way the ECU handles the fuelling...

It doesn't just remove the cut, it shifts the fuel cut, by shifting the boost values the ECU reads.
Say for argument sake:
1V - 4 PSI
2V - 8 PSI
3V - 10PSI

The FCD (if it is an HKS type) will make it:
1V - 3PSI
2V - 7PSI
3V - 9PSI
4V - 11PSI

So if say the ECU usually cuts of at 4V, 4V will be equivilant to 11PSI. However the ECU will still see the wrong values, i.e. at 2V it is really 8PSI and not 7PSI, so the ECU will fuel for 7 PSI when you need fuelling for 8 PSI. Hence the whole need of fuel regulators and such things.
 
G

glanzaV195

Member +
you dont say if you have a gt or glanza, most people put them in to the loom by the ecu to keep the fcd dry instead of by the map sensor, heres the glanza diagram

fcd.jpg


oh yeah and you want it on setting 9 to run 0.9-1 bar, 1 being the highest level 12 is lowest on the dial

if u have a gt this thread may help, it has a diagram
http://www.toyotagtturbo.com/showthread.php?t=13579&highlight=fuel+diagram
 
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L

liam2368

Member +
glanzaV195 said:
thats what mine is on and i run just over 1 bar, and one of my mates runs the same, so yes i'm sure,
Click to expand...

so how come everybody says to run on 7 or maybe 8? its confused me a bit as i havnt had chance to get the car on a rr so i don't know whats best for my car.
 
G

glanzaV195

Member +
liam2368 said:
so how come everybody says to run on 7 or maybe 8? its confused me a bit as i havnt had chance to get the car on a rr so i don't know whats best for my car.
Click to expand...

ive actually run 16 psi on setting 9 and never ever hit fuel cut... start using it on 9 if it does happen to hit fuel cut then turn to 8, a hks fcd is only a variable resistor,no great electronic masterpeice,the setting you need it on could be different between different cars i guess but i would start it on 9... just remember the lower the number u put it on the leaner it will make it.
 
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