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pilothillcrawler 01-03-2008, 05:45 PM My harness from howell did not come with a connection for the oil pressure switch. Do I need this to function properly? the motor starts fine, I have only ran it for a few seconds and then shut it off. :Edit: Oh yeah, 1990 350 TBI Bo185 01-03-2008, 06:31 PM My harness from howell did not come with a connection for the oil pressure switch. Do I need this to function properly? the motor starts fine, I have only ran it for a few seconds and then shut it off. It would be nice to know what motor! :shaking: pilothillcrawler 01-03-2008, 07:17 PM 1990 350 Tbi FrankenToy 01-03-2008, 09:07 PM Technically the engine shouldn't run for more than a few seconds with the oil pressure sensor disco'd. The oil pressure sensor is critical and I can't imagine a "purchased" harness NOT having this. Are you sure it's the oil pressure sensor and not the oil pressure gauge? The oil pressure gauge connection is not critical. GMCTruxrule 01-03-2008, 09:15 PM All an oil pressure switch is going to do is kill your motor (if you have it wired up right) if oil pressure drops below the switch setting. A good safety, but any monkey should be able to monitor his oil pressure all on his own. IMHO Badburn 01-04-2008, 07:41 AM The 1990 oil pressure switch shuts off the fuel pump when there is no oil pressure. It is not mandtory, I dont believe the computer even knows if it is there. Check a wiring diagram , it would be easy to add if you wanted to. Mechanos 01-04-2008, 09:29 AM All an oil pressure switch is going to do is kill your motor (if you have it wired up right) if oil pressure drops below the switch setting. A good safety, but any monkey should be able to monitor his oil pressure all on his own. IMHO I believe it's primary purpose is not to save the engine in case of lost oil pressure. Rather, it's a safety feature in case of a roll over. When a vehicle is upside down, it will loose oil pressure and shut the fuel pump off so it does not continue to pump fuel and potentially cause a fire. pilothillcrawler 01-04-2008, 09:15 PM ok, so is the consensus that the computer does not even know about the switch? I can function without it and just pay attention to the gauge? BEANE 01-04-2008, 11:20 PM i dont run a oil pressure sensor or switch on my tbi and it runs fine Badburn 01-05-2008, 05:32 AM ok, so is the consensus that the computer does not even know about the switch? I can function without it and just pay attention to the gauge? Yes. | |