'89 Pickup Vac. Sw. - Toyota Nation Forum : Toyota Car and Truck Forums

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post #1 of 8 Old 01-23-2017, 12:51 AM Thread Starter
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'89 Pickup Vac. Sw.

Today I was working on my truck and noticed that it was running rough when cold because one of the vacuum switches seemed to not be functioning properly and was creating a vacuum when there wasn't supposed to be one. The problem I am having is that the vacuum diagram calls this part a Vac. Sw. but when I search the internet for a replacement I can't seem to find anything. I have attached pictures for reference(they aren't the greatest). The part I am looking for is the uppermost(of the 3) white puck-like part. What is the actual name of this part and where could I find one? Any and all help is greatly appreciated. Thank you.




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post #2 of 8 Old 01-23-2017, 01:18 AM
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I tried looking up those parts but there are so many models (dozens) I couldn't narrow it down. Do you know your chassis code or even a VIN would be good. Maybe someone else knows more about those vacuum switches.

K after a bit more digging the one on the left looks like what you have with some more info should be able to find the specific part you need.

http://www.ebay.com/itm/112277103481

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1990 Camry LE V6 Anniversary Edition 5-Speed
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post #3 of 8 Old 01-23-2017, 09:38 AM Thread Starter
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Thank you for such a fat response! I really appreciate it. I'm not sure if this is my chassis code but the door sticker says it's model is an R80L. I've struggled to find information on my model since it's an '89 with a 22r. From what I can tell most pickups that year and forward were running the 22-re. I will attach an image of the door sticker as well in case that is any help.


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post #4 of 8 Old 01-23-2017, 10:58 AM
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Here's what I found

83391-12210 MARK=80FM
83391-27060 MARK=400FB

Can you see any marks on the valve? Here's a list of donor cars in case you want to try and find used.

08/1988-08/1990 TOYOTA TERCEL EL31
08/1987-05/1992 TOYOTA COROLLA AE92,95
08/1987-05/1991 TOYOTA COROLLA AE92
08/1987-08/1992 TOYOTA COROLLA AE92
08/1988-10/1995 TOYOTA 4RUNNER TRUCK RN8*,90,12*,VZN85,9*,VZN120

I could only find a clear image of one of the part numbers I don't know if one can replace the other.


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post #5 of 8 Old 01-30-2017, 07:16 PM Thread Starter
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Maybe I don't fully understand how this vacuum switch works. I bought the new switch, plugged it in and the car continued to run poorly. I checked the leads on the plug to the switch and they get 12V. Maybe it's the time of the car? The reason that is my next thought is because when the car is cold I have to unplug the switch to increase airflow and when it is warm I plug it back in and everything is fine. My thought was that the part would leave the vacuum open when cold and then close itself when the car warmed up but they don't seem to be working that way. Am I missing something? Thanks again for your help


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post #6 of 8 Old 02-14-2017, 12:25 AM Thread Starter
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Bump


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post #7 of 8 Old 02-14-2017, 12:52 AM
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What happens if you temporarily block the line off that goes to that switch? Does the engine run differently? I'm unclear how that whole system works.

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post #8 of 8 Old 02-14-2017, 09:58 AM Thread Starter
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Yes. If the engine is cold and you block both lines the engine chokes on itself. It warms up alright with 1 line unplugged and the idle is quite fast if both are left I plugged. Once warm, you can plug both lines off, therefore closing the vacuum and it runs great


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