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Old 04-30-2021, 08:29 PM   #1
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How do I adjust this pressure switch?

I bought a VDO 8-13 psi adjustable pressure switch that is factory set at 10psi.

I went to adjust the psi and thought it would be a simple matter of using a small flat or Philips head screw driver. It has a rubber grommet that appeared to have a slit in it, but when I went to push the screwdriver in, it was solid.
I pried out grommet hoping to find the adjustment screw under it. No such luck.

I tried searching online, on the manufacture's website and no luck.

Can anyone tell me if these switches have a common way to adjust the psi??

Thanks!
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Old 04-30-2021, 09:08 PM   #2
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Quote:
Originally Posted by Simplicity View Post
I bought a VDO 8-13 psi adjustable pressure switch that is factory set at 10psi.

I went to adjust the psi and thought it would be a simple matter of using a small flat or Philips head screw driver. It has a rubber grommet that appeared to have a slit in it, but when I went to push the screwdriver in, it was solid.
I pried out grommet hoping to find the adjustment screw under it. No such luck.

I tried searching online, on the manufacture's website and no luck.

Can anyone tell me if these switches have a common way to adjust the psi??

Thanks!
I'm no expert but that looks like a pressure sending unit and if it is then it'
s not going to be adjustable. It just closes an internal electrical contact at a certain pressure range, in your case 8 to 13 psi. What is it for?
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Old 04-30-2021, 09:36 PM   #3
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Quote:
Originally Posted by Shamoke View Post
I'm no expert but that looks like a pressure sending unit and if it is then it'
s not going to be adjustable. It just closes an internal electrical contact at a certain pressure range, in your case 8 to 13 psi. What is it for?
It's not a pressure sending unit, it's a pressure switch.

Why would it say it's "adjustable" between 8 and 13 psi if it we not truly adjustable?

I added a Tee to my MAP sensor port and use the switch to activate my transmission modulator for shifting under load.

It works at the factory 10psi, but I want to test it at the lower psi level.
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Old 04-30-2021, 09:41 PM   #4
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These are the ones I used. http://www.atpturbo.com/mm5/merchant...egory_Code=BCS
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Old 04-30-2021, 09:42 PM   #5
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They also have them on evil-bay too.
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Old 04-30-2021, 09:43 PM   #6
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Did you look down the threaded hole for a screw?
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Old 04-30-2021, 10:37 PM   #7
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Figured it out. It's adjustable, but not with a typical screw head. You use an allen wrench. Would have been so simple if they could just put that in the packaging, right?

Thanks for the replies!
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