2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Initial set coupler?

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Old May 25, 2009 | 05:52 PM
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Initial set coupler?

Im trying to set my idle and adjust my mixture, and the FSM says to ground out the initial set coupler, and shows a drawing, but I cannot, for the life of me, find that friggin' thing. The drawing is for an N/A motor. Can someone please post a pic, or at least gimme a good idea where to look, and if possible, tell me what color the wires are to the connecter im lookin for? Its for an 88 Turbo II. Thanks! Brian
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Old May 25, 2009 | 06:30 PM
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Look for a single green connector right next to the leading coil pack beside the battery in the very front of the engine compartment. There should also be a larger green connector right next to it.
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Old May 25, 2009 | 06:34 PM
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It's a green plug, in the front right corner of the engine bay (right near the leading coil.) It has 2 wires going into it, orange and black.
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Old May 25, 2009 | 06:42 PM
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Can someone explain what grounding it out actually does? I've never cared to do it when timing or setting the TPS/idle...
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Old May 25, 2009 | 06:45 PM
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Originally Posted by KhanArtisT
Can someone explain what grounding it out actually does? I've never cared to do it when timing or setting the TPS/idle...
Idk, I just do it because the FSM says so.
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Old May 25, 2009 | 08:09 PM
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awesome, so just run a jumper wire from the orange to black and im good to go, right?
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Old May 25, 2009 | 08:15 PM
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Originally Posted by buj818
awesome, so just run a jumper wire from the orange to black and im good to go, right?
Yep. I actually got fancy with it and crimped a spade connector on each end of a short wire so I can plug it into the connector, I got tired of twisting the ends of the wire to fit in there.
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Old May 25, 2009 | 08:22 PM
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i think ima steal your patent for that. haha. went out and found it all. im going to give it a shot tomorrow. thanks for the help fellas!
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Old May 26, 2009 | 05:04 AM
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Jumper the single green connector to any ground with a piece of wire. You can use a plain piece of wire that has been stripped at both ends. Or, you can make up a simple jumper wire by putting a male blade connector on one end and a small alligator clip on the other. Stick the blade connector into the green connector and attach the alligator clip to any metal part that has a good connection to the chassis or engine.

I believe that grounding the connector takes the ECU out of the loop so that the BAC is disabled.
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Old May 26, 2009 | 08:03 AM
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Originally Posted by Go48
Jumper the single green connector to any ground with a piece of wire. You can use a plain piece of wire that has been stripped at both ends. Or, you can make up a simple jumper wire by putting a male blade connector on one end and a small alligator clip on the other. Stick the blade connector into the green connector and attach the alligator clip to any metal part that has a good connection to the chassis or engine.

I believe that grounding the connector takes the ECU out of the loop so that the BAC is disabled.

FYI: Series four have a two socket, green connector that you jumper the two sockets to *set* the initial set coupler. All that does is FIX the BAC's duty cycle and nothing else. If the rpms are under 1200rpm you don't need to do this imho.
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Old May 26, 2009 | 01:29 PM
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Oops! I didn't know that the S4 was different. Sorry for the misinformation.
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Old Oct 13, 2023 | 04:50 PM
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Originally Posted by need RX7
Yep. I actually got fancy with it and crimped a spade connector on each end of a short wire so I can plug it into the connector, I got tired of twisting the ends of the wire to fit in there.
Does it need to be back probed? Or can I just stick them in form the front of the plug?
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Old Oct 13, 2023 | 06:32 PM
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Way to go resurrecting a 14 year old thread. Back probing a connector would seldom need done unless it is plugged into a mate. For instance. the leads of the meter won't say on/in the front without holding them there and you don't have a helper while needing to turn the key on the ignition or similar.
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Old Oct 14, 2023 | 09:02 PM
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1986 non turbo.





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