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 LT1 Low oil pressure FP cutoff

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bamalongroof

bamalongroof


Posts : 761
Join date : 2013-08-23
Age : 71
Location : Huntsville, AL

LT1 Low oil pressure FP cutoff Empty
PostSubject: LT1 Low oil pressure FP cutoff   LT1 Low oil pressure FP cutoff Icon_minitimeTue Nov 25, 2014 11:02 pm

Did a search and didn't find an answer to this question - does the LT1 have a fuel pump cutoff if oil pressure drops to 0? Thanks, Jeff
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95BRMW

95BRMW


Posts : 1695
Join date : 2009-08-15
Age : 40
Location : Connecticut

LT1 Low oil pressure FP cutoff Empty
PostSubject: Re: LT1 Low oil pressure FP cutoff   LT1 Low oil pressure FP cutoff Icon_minitimeWed Nov 26, 2014 7:52 am

Some say it does, others say it doesn't. I can tell you the oil sender on my Caprice has been bad for years and pegs in the red with the "check gauge" light on yet continues to run fine.
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81X11

81X11


Posts : 9876
Join date : 2010-06-23
Age : 50
Location : Round Rock Texas

LT1 Low oil pressure FP cutoff Empty
PostSubject: Re: LT1 Low oil pressure FP cutoff   LT1 Low oil pressure FP cutoff Icon_minitimeWed Nov 26, 2014 10:05 am

I think a lot of LT1's show low oil pressure. Mine's above halfway on the gauge when cold, but once warmed up at idle it sits right below the lower mark to right above the red mark. Car runs super and always has!

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Fred Kiehl

Fred Kiehl


Posts : 7290
Join date : 2009-11-13
Age : 76
Location : Largo, FL 33774

LT1 Low oil pressure FP cutoff Empty
PostSubject: Re: LT1 Low oil pressure FP cutoff   LT1 Low oil pressure FP cutoff Icon_minitimeWed Nov 26, 2014 10:36 am

Do you have a gauge that follows the pressure, or was it pegged when on, and not when off? If so you may have a sender that only registers when the pressure is on, and off, not the variations in pressure. The sender in this case could be the issue. They do go bad, and you have to replace it with the proper one.

I do not know if the oil pressure switch will kill the pump. According to the Haynes manual, the oil pressure switch bypasses the fuel pump relay to allow the engine to start when there is proper oil pressure. From what I understand, as long as there is a spark signal, the fuel pump continues to run.
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71novaguy




Posts : 233
Join date : 2014-01-14

LT1 Low oil pressure FP cutoff Empty
PostSubject: Re: LT1 Low oil pressure FP cutoff   LT1 Low oil pressure FP cutoff Icon_minitimeWed Nov 26, 2014 8:54 pm

Anyone got a wiring diagram for this circuit? That would solve it
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Fred Kiehl

Fred Kiehl


Posts : 7290
Join date : 2009-11-13
Age : 76
Location : Largo, FL 33774

LT1 Low oil pressure FP cutoff Empty
PostSubject: Re: LT1 Low oil pressure FP cutoff   LT1 Low oil pressure FP cutoff Icon_minitimeWed Nov 26, 2014 9:04 pm

You need a wiring diagram of the computer to determine what inputs the computer gets, and how they are handled.
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bamalongroof

bamalongroof


Posts : 761
Join date : 2013-08-23
Age : 71
Location : Huntsville, AL

LT1 Low oil pressure FP cutoff Empty
PostSubject: Re: LT1 Low oil pressure FP cutoff   LT1 Low oil pressure FP cutoff Icon_minitimeWed Nov 26, 2014 9:28 pm

Well my wagon is back on the road with a new all aluminum radiator and oil cooler delete as mtrhead79 suggested.
The car is running perfect even after losing 4 of its 5 quarts of oil with a *^$@+* Dorman one piece gasket for the oil cooler lines to adapter.

Hopefully I have not shortened the life of the engine no knocking or odd sounds on startup and just drove her 100 miles all seems as normal Yea! Jeff
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LT1 Low oil pressure FP cutoff Empty
PostSubject: Re: LT1 Low oil pressure FP cutoff   LT1 Low oil pressure FP cutoff Icon_minitime

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