Stock ECU with High Impedance Injectors

I have recently had to buy new injectors the factory injectors were leaking badly.
I still got the factory ECU, car is pretty much standard all round.my daily driver.

Bosch top feed fuel injector ,green top ,Ford racing 440CC
part No: 0280150558

42LBS hr @ 43.5 PSI 440cc/min, Resistance: 14.5 Ohms

was told I need to remove the injector resistor pack.
Is this straight forward?

Can i ask why you bought the injectors you did ? 

The  resistor pack is next to the near side strut top just unplugs but not sure what else you need to do

Hi.
I wasn't able to find stock injectors or suitable low impedance injectors.
so I bought these new Bosch ones.

do I simply unplug the resistor pack or have to bridge it somehow ?

I have a set of good working order stock injectors, replaced mine for bigger ones hence removal. Pm me if interested, thanks

thanks for that. I only just bought the new ones, cost $170NZ.
being so old the stock injectors are prone to failure.
Ive already had to change 5 injectors in 2 years.
must have bad luck:(

Must be bad luck haha, ok well if you get stuck let me know,

Peter from PLMS Developments in Australia reckons its OK to run High impedance inj. just need to delete the resistor unit.

http://www.plmsdevelopments.com/

I was kinda rushed in getting the Bosch injectors, its my daily driver and need to get around

The resistor pack consist of 5 wires, 4 black, 1 white.
Basically, the ECU drives the 4 injectors from pins 101, 103, 110, 112 (negative pulse), the 4 remaining common wires from the injectors then goto the 4 black wires on the resistor pack. The white wire on the pack then goes to a positive feed.
Hope this helps.

thanks for the info, will be researching how one goes about bypassing that resistor pack.
why did nissan use those injectors ?
back then they were the best performing type ?


http://performancefuelsystems.com/InjectorCompattibilitywithECUs-TechCorner.htm

Resistor pack brings it down to around 5v without it should see 12-14 best of it is low impedance i am sure are more reliable and dont heat the board on ecu.
Someone will hopefully know more than me on this

I would of personally just had them cleaned and bought new seals wich are cheap enough ... especially if you had bought 5 before ... as johnny said the resistor pack is located on top of the strut it looks like a oblong silver box ...

I had my first set sorted as above new seals pintle  caps and ultra sonically cleaned and flow tested. But back to topic not sure on the bypass

I had bad experience with the stock injectors, they where seeping from around the body of the injector plastic/metal join.
they where bought from the same guy. he might have known the they were dodgy
20 yrs old can be expected

https://s1089.photobucket.com/user/NIssangallery/media/20140308_130008.jpg.html

the pictures shows the leaking

Bypass is simply removal of resistor & the white wire feeds the four black wires.
The ECU injector controllers on GTiR are pretty much same as high impedance equipped ECU's.
I use a set of low impedance evo injectors myself but have seen modern high impedance injectors used on base GTiR ECU.

Ok, great so only takes a few minutes ?

* remove the resistor unit
* disconnect white wire that feeds the 4 black wires

thanks

=122849099&filters[recent]=1&sort=1&o=1]resistor pack

Are you confiming thats the resister pack ? .... if so thats it  

dnm wrote:Ok, great so only takes a few minutes ?

* remove the resistor unit
* disconnect white wire that feeds the 4 black wires

thanks

The white wire is the 12V hot, it needs to feed the 4 black wires or injectors will get no power feed..
On low impedance injectors without proper ECU injector control for low impedance manufacturers add the resistor pack to keep the amp load within a limit the ECU injector control can handle. Without the resistor pack on low impedance injectors the load could be 4 to 5amps & burn the ECU injector control out
High impedance injectors pull about 0.8 to 1amp so resistor pack not needed.
Low impedance have fast response times due to speed of solenoid with fewer windings, modern high impedance has made up the gap with light weight injector parts & tight tolerance manufacture.
Worth getting fuelling checked when do any work like this as best to be sure it spot on as will save big hassle & bigger money over going the lazy root of just assuming ok ...

Some good info there .... ive never really looked into injectors that much  so its always good to know in abit more detail  

Sticky that please mate

Injector Compatibility With ECU’s

injector types

dnm wrote:Injector Compatibility With ECU’s

injector types

GTiR does not have peak & hold injector control circuitry, it has pretty much same as all other sr20 ECU's that use high impedance injectors.
This is why they use the resistor pack as it protects the ECU switching circuitry, a proper peak & hold controller does not use a resistor pack.
Many quality stand alone mappable ECU's will allow use of high or low impedance injectors during setup.

Thanks for the helpful feedback, I'll be removing the resistor unit this weekend.