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what is this plug and where does it go

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what is this plug and where does it go

Old 02-15-2019, 10:40 AM
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what is this plug and where does it go

Found this plug dangling while I was swapping out my transmission the other day. 1987 4runner SR5 , runs fine but Im sure that its supposed to be plugged in somewhere. Its hanging under the intake on the passenger side. I looked around but couldn't find any other open plugs.

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Old 02-15-2019, 05:31 PM
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My guess is cold start fuel injector. Will only affect starting in colder weather although I would plug it back in.
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Old 02-15-2019, 05:55 PM
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Can you take a picture of where it goes? Truck has fired right up when the temp was in the teens
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Old 02-16-2019, 04:27 AM
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that is not the factory connector for the csi. i suspect that it is the connector for the FpU vsv located on top of the valve cover to the rear.



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Old 02-16-2019, 04:34 AM
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Originally Posted by wallytoo View Post
that is not the factory connector for the csi. i suspect that it is the connector for the FpU vsv located on top of the valve cover to the rear.



that's the coolest distributor boot...oem?
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Old 02-16-2019, 04:52 AM
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yes, as far as i know. both of my '87s have it.
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Old 02-16-2019, 08:56 AM
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Originally Posted by 87-4runner View Post
that's the coolest distributor boot...oem?
I have a couple of those boots, one was in backseat storage in my '91 and another was on my '92 parts truck. I think often they get removed and lost or tossed.
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Old 02-17-2019, 06:36 AM
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I think is for the idle air control valve, it is just below the intake manifold.

https://www.yotatech.com/forums/f116...k-like-143319/
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Old 02-17-2019, 06:39 AM
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The one on post #12 is the one you're looking for in your '87.
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Old 02-17-2019, 06:52 AM
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Old 02-17-2019, 10:31 AM
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If you find it doesn't go here to the IACV then it's an unused connector for an auto trans or something else. I can't remember what it was for. I've had two other 4Runners that had the same unused light blue connector dangling.

Last edited by se7enine; 02-17-2019 at 10:32 AM.
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