High imp to low imp Injectors
12-15-07, 06:28 PM
#1
Wish he had a running rx7
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High imp to low imp Injectors
The question is does the s4 model rx7s have a resistor so that you can use the high imp injectors on a low imp ecu.
12-15-07, 07:14 PM
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Rx-hippie
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Yes, they have a resistor pack. To use high impedance injectors on a S4 (low impedance) ECU you need to remove the resistor pack.
And to use low impedance injectors on a S5 (high impedance) ECU you will need to use a resistor pack.
And to use low impedance injectors on a S5 (high impedance) ECU you will need to use a resistor pack.
12-15-07, 07:38 PM
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Wish he had a running rx7
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Let me get this straight.
To use S4 high imp injectors on a low imp ecu you have to. REMOVE THE RESISTOR PACK.
To use the low imp injectors on a High imp S5 ECU you have to. GET A RESISTOR PACK.
To use S4 high imp injectors on a low imp ecu you have to. REMOVE THE RESISTOR PACK.
To use the low imp injectors on a High imp S5 ECU you have to. GET A RESISTOR PACK.
12-16-07, 02:05 AM
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S4 = low
S5 = high
if it's going into a S4 the resistor pack is already wired into the harness.if the resistor is left in place it will run low imp injectors which came w/ the car originally.
S5 = high
if it's going into a S4 the resistor pack is already wired into the harness.if the resistor is left in place it will run low imp injectors which came w/ the car originally.
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12-30-07, 07:52 PM
#9
HAILERS
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Then if he has a early 1987 low impedence injector car, all he has to do is go to the solenoid resistor package, remove it from the harness, then cut the pigtail of the solenoid resistor package in half. PUt the resistor package in the doghouse out back. Take the remainder of the pigtail, and solder ALL FIVE OF THE WIRES together and cover with shrink tubing.
Then reinstall the pigtail with five soldered together wires back to the EM harness. He's through. Done. Fini.
Then reinstall the pigtail with five soldered together wires back to the EM harness. He's through. Done. Fini.
Last edited by HAILERS; 12-30-07 at 07:58 PM.
12-31-07, 06:27 AM
#11
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If the car was a early series four that came with the solenoid resistor package, you'd just determine which of the five wires in that package are for the secondarys, then cut just those two wires in the pigtail, and somehow splice /solder them to the one wire of the five wires that is the 12vdc feed wire. You've just bypassed the resistor package for those two wires and are *good to go*.
The injector plug will be different for the high injectors and you'll have to find an electrical plug that will fit the new injectors.
Of those five wires in the solenoid resistor pigtail, one is power from the Main Relay. The other four go to the individual injectors. The power wire feeds the four others.
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