when is it that you need to use a injector resistor box?

 

so you dont fry your ecu when using saturated injectors

 

which injectors are saturated, and which are peak and hold? dang ima go search how i just got lazy as hell sorry.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dirtyd463 &raquo;</TD></TR><TR><TD CLASS="quote">so you dont fry your ecu when using saturated injectors</TD></TR></TABLE>

I believe you need the resistor box for peak/hold injectors, not for saturated. Lots of posts covering this.

 

acy76 is correct.....

Saturated: No resistor module
Peak and Hold: Needs resistor module

 

sorry i had it backwards

 

Is the d16z6 head off a del sol saturated or peak and hold? my head swap came with a resistor box but im not using it.

 

last bump to se if i can get some help before i get some sleep.

 

It doesn't have to do with your head. It has to do with the injectors. If you look to see if the donor car had a resistor box stock, then you will need one as well. I'm not sure whether or not your application has peak/hold or saturated injectors.

EDIT:: Just re-read your last post. Um, I would say you should put that thing on there pretty soon. From what I've heard you can run it for a bit without it, but you definitely risk frying your ECU. Exaclty the meaning of resistor... it lowers the voltage(or amps or ohms, i'm not sure) going back towards the ECU. The circuitry inside of the ECU isn't made to withstand it.

 

This is the easy way to remember it. ALL OBD0 MPFI cars are the ONLY ones that NEED a resistor box. Any MPFI honda pre-1991
OBD1 and OBD2 do NOT. Any 1992 to present honda.
Then you dont have to remember which ones are saturated or vice versa

 

if i dont need a box and i use one, is there any harm, im going to try to use it but i dont even kno if i need it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DarkKnight[DMD &raquo;</TD></TR><TR><TD CLASS="quote">]EDIT:: Just re-read your last post. Um, I would say you should put that thing on there pretty soon. From what I've heard you can run it for a bit without it, but you definitely risk frying your ECU. Exaclty the meaning of resistor... it lowers the voltage(or amps or ohms, i'm not sure) going back towards the ECU. The circuitry inside of the ECU isn't made to withstand it.

</TD></TR></TABLE>

Resistors have a voltage drop. I thought that peak n hold injectors had lower resistance than saturated (around 2-3 while saturated is 12-13). The resistor box must drop the voltage coming from the ECU to the injectors.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4crx4me &raquo;</TD></TR><TR><TD CLASS="quote">This is the easy way to remember it. ALL OBD0 MPFI cars are the ONLY ones that NEED a resistor box. Any MPFI honda pre-1991
OBD1 and OBD2 do NOT. Any 1992 to present honda.
Then you dont have to remember which ones are saturated or vice versa</TD></TR></TABLE>

If this is true then why do you get a resistor box with a 92-95 h22a complete swap? And why is it in the car from the factory?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DarkKnight[DMD &raquo;</TD></TR><TR><TD CLASS="quote">]

If this is true then why do you get a resistor box with a 92-95 h22a complete swap? And why is it in the car from the factory?</TD></TR></TABLE>
Don't know. Are you sure the engines are gray plug OBD1? And not OBD0?
I have read OBD1 and OBD2 do not need the resistor box.

 

My h22 civic uses a resisitor box.

 

does anyone know about a del sol 95 d16z6 injectors?

 

To find out if you need a resistor box just measure the resistance between the pins on the injector and see what they read. If they read low (2-3 ohms) then you need a resistor box. If there high (12-13 ohms) then you don't. I believe that OBD0 civics need resistor boxes.

 

Why guess?

Grab a multi-meter and measure the injector coil resistance.

If it = 3-4ohms, you have peak/hold and NEED a resistor box.

If it = 12-16ohms, you have saturated and do not need the box.

You gotta step back for a second and ask yourself "Hmm...this engine came to me with a resistor box...perhaps the seller DID have peak/hold injectors installed"

Why did you not bother putting the resistor box back in anyway?

 

You guys are totally right.... I have a question. You know on the the injector harness... There is a comon positve or negative vice versa not sure which one is which. But as long as you get the main color wire solder (the four different wire colors). The ecu will know what injector to fire...right. I am anly asking because i have an injector box and was was wondering if the comon needs to be set as 1234 because i notice 4 comon at the resistor box. I would think it does not matter. Does any one have a pinout out at the injector box?

 

I will be even clearer...I got a 96 jdm h22, which is going into a 94 accord. Of course the 96 has high impedance injectors. I cut the injector/alternator harness off, so i can use the jdm one to have a more stock look. The injector box does not know which one is common in an order...correct. It just throws a signal with no speccific fireing order right.

 

does it matter what year resistor box it is? example, 88-89 crx si box in a 95 gsr? or is it just plug n play dont matter?