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Oil pressure switch?

Tiny
MATTTYW20
  • MEMBER
  • 1990 CHEVROLET TRUCK
  • 130,000 MILES
My oil gauge inside my truck usually reads about 35 basically right in the middle but the other day it dropped to around 15 while at a red light sounded like it was buckin but not really sure when accelerated it went back up to the middle the truck always starts so I'm thinking that its the oil pressure switch that I think is located near the distributor it always starts an has never done this before please let me know what your opinions are thank you
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Sunday, September 30th, 2012 AT 2:06 AM

8 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Have the oil pressure checked with a manual gauge to verify the switch is sending correct signal.

Roy
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Sunday, September 30th, 2012 AT 3:12 AM
Tiny
MATTTYW20
  • MEMBER
  • 113 POSTS
And too do that you just unhook the switch and put the manual gauge where it goes an how are those expensive to get
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Sunday, September 30th, 2012 AT 4:34 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Yes, remove the switch and insert a gauge. You can rent them at a parts store.

Roy
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Sunday, September 30th, 2012 AT 4:36 AM
Tiny
MATTTYW20
  • MEMBER
  • 113 POSTS
Okayy and if the presure doesnt bounce around on the manual gauge does it mean the switch is bad cause the whole cluster is new so I know the gauge in there is good
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Sunday, September 30th, 2012 AT 4:39 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
No bouncing. It should be steady. At idle, no less than 10 lbs. Above idle around 20 on up and constant.

Roy
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Sunday, September 30th, 2012 AT 4:40 AM
Tiny
MATTTYW20
  • MEMBER
  • 113 POSTS
Alright and if everythings good on the manual then it means the switch is bad correct? I only think switch cause ive had the truck for over a year and it never did this before so its a new thing and I replaced the coolant sensor 6 months ago soo I think the person I bought it from didnt know how to mantain a vehicle lol
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Sunday, September 30th, 2012 AT 4:44 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Yes, it could e the switch but we need to start somewhere. Do the test and we go from there.

Roy
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Sunday, September 30th, 2012 AT 2:54 PM
Tiny
MATTTYW20
  • MEMBER
  • 113 POSTS
Alright I drove it today and the needle was good didnt move much its only seem to be a lil bouncy at one read light but it was still above 10 but didnt sound right i'm gettin the gauge tomorrow but i'm honestly kinda lost I jus cant rly afford a big repair right now
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Monday, October 1st, 2012 AT 2:07 AM

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