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  #11  
Old 05-07-2019
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John Wyatt – Administrator/Moderator
 
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Originally Posted by Big Al View Post
Quote:
Originally Posted by Kiwi3 View Post
Thanks John!
Thanks Al!

That sender on eBay looks just like the original sender. I've ordered one and will try swapping it out.
That appears to be a normally closed pressure switch - you need a normally open pressure switch. See post number 3.
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John Wyatt
Titusville, Florida
1991 40' WLWB-WTB
Body Number F095567
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1991 40' WB ...From 2008 - Present
1984 ½ PT-36 .From 2000 - 2008
1973 FC-31 .....From 1991 - 2001
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  #12  
Old 05-07-2019
Big Al Big Al is offline
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That appears to be a normally closed pressure switch - you need a normally open pressure switch. See post number 3.
Good catch John.

The NC behind the part number stands for normally closed.
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  #13  
Old 05-07-2019
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Well..............
I guess I'll cancel that.

Weird thing is the oil pressure gauge and VMSpec both show 35 PSI at idle. So maybe I have some gunk clogging the new sensor? Dunno. Actually is this even needed really?
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  #14  
Old 05-07-2019
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John Wyatt – Administrator/Moderator
 
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Originally Posted by Kiwi3 View Post
Well..............
I guess I'll cancel that.

Weird thing is the oil pressure gauge and VMSpec both show 35 PSI at idle. So maybe I have some gunk clogging the new sensor? Dunno. Actually is this even needed really?
Hi Bruce

The pressure switch serves more than one purpose.

It’s used in testing the "Check Trans" light at start-up and it provides the positive voltage for the coil of the "Check Trans" relay after start-up. It also provides a redundant source of power for the ECU relay.

Nothing real special about the pressure switch – it just needs to be open when the engine is not pumping oil and closed while the engine is pumping oil. Hence the ~ 3-6 psi range…
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John Wyatt
Titusville, Florida
1991 40' WLWB-WTB
Body Number F095567
My Location: http://www.bbirdmaps.com/user1.cfm?user=4

1991 40' WB ...From 2008 - Present
1984 ½ PT-36 .From 2000 - 2008
1973 FC-31 .....From 1991 - 2001
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