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Old 10-16-12, 01:20 PM
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resistor pack

How to by pass a resistor pack on a 1987 mazda s4 turbo?
Old 10-16-12, 01:41 PM
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Fuel pump resistor/relay, or injector resistor pack? Why are you wanting to bypass?
Old 10-16-12, 01:57 PM
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Sorry injector resistor pack. The car has s5 turbo injectors and this means it is high impedance right? Another thing the injector resistor pack has five wires which ones do i connect together?

Last edited by SICKRX7FC; 10-16-12 at 02:00 PM.
Old 10-16-12, 01:58 PM
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I'm also using a s4 stock ecu.
Old 10-16-12, 02:17 PM
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Yes, S5 injectors are all high impedance.

To bypass an injector resistor pack, you connect ALL 5 wires on the harness-side plug together. One wire is power from the main relay and the other 4 go to the (+) side of each injector (B/Y wires). By connecting everything together, you run direct power to each one.

You can also cut the wires off between the pack and the pack-side plug and solder them together there: https://www.rx7club.com/2nd-generati...or-box-672951/
Old 10-16-12, 04:39 PM
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ok i think I'm going to modify the injector resistor pack side and just solder the 5 wires and just connect the pigtail back to the hardness. Thanks for your help!

Last edited by SICKRX7FC; 10-16-12 at 04:41 PM.
Old 10-16-12, 05:00 PM
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Hey RotaryRocket88. Can you show me or give me a link on how to do a compression test? Another problem I have is that the car didn't come with a fuse box cover and i don't know which fuse is for the injectors. I know that you need to take off the injector fuse in order to do the compression test right? One more thing what type (metric? right?) of socket and what size? I tried the 5/8 and the 3/4 and they were long and they didn't fit to the spark plug. please help I'm new to mazdas sorry for these types of questions.
Old 10-16-12, 05:18 PM
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Compression test:
Banzai Racing Home Page
Old 10-16-12, 06:12 PM
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13/16 socket for the spark plugs.
Sec Gen section "FAQ's has the fuse diagram.
I pull the first 2 closest to the engine.(EGI and Comp fuses)
Old 10-17-12, 10:39 AM
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thanks guys i appreciate your help.
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