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Previous Thread Next Thread Print Thread Rate Thread Checking an oil pressure sending unit #808612 04/28/07 03:20 PM Joined: Sep 2002 Posts: 62 Northeastern, Pennsylvania T ttreat OP Getting the Wheeling Fever Does anyone know how to correctly check an oil pressure sending unit. The PO had an aftermarket sending unit and gauge installed which started to leak oil. I replaced it with a new sending unit from NAPA. The old one had one wire to the gauge and the new one has one spade for the connector. I installed it but it doesn't work. It shoots to 75 psi when the key is on and doesn't move. I measured resistance on the old sending unit and got 240 Ohms. I can't get any reading on the new one. Does this mean it is bad or does it operate differently? ttreat 95 T-100 SR5 4x4 Pretty much stock, except for the goofy oil pressure gauge the previous owner installed. Re: Checking an oil pressure sending unit [Re: ttreat] #808613 04/29/07 05:28 AM Joined: Dec 2004 Posts: 159 Georgia W Whizkidder Wheeler My guess is the new NAPA sender works differently from the old one (different resistance scale). Does the new sender look about the same as the old one (most are shaped like a small can, about the diameter of a quarter or a bit larger, and about 1 - 1.5 inches tall)? Since you have an Ohm meter, and can't get a reading at all on the new sender, it might be bad. I'd take it back and have NAPA check it against the specs for a new one. Re: Checking an oil pressure sending unit [Re: Whizkidder] #808614 05/02/07 01:18 PM Joined: Dec 2006 Posts: 44 So Central Texas E eppoh Getting the Wheeling Fever Aftermarket OP senders are a PIA on these trucks, in my experience. Just bite the bullet and buy one from Toyota- they fit and work. Try one of the suggested retailers on this forum. Their prices are pretty good. In any case- you aren't going to see good pressure- regardless of the sender. Last edited by eppoh; 05/02/07 01:18 PM. Moderated by  4x4Wire, Dandeman, ErikB, kewlynx  Hop To Mitsubishi Forums ------  Mitsubishi 4x4 and SUV Tech  Mitsubishi Diesels  Mitsubishi ArchiveToyota Forums ------  Early Toyota Trucks  Toyota 4Runner, FJ Cruiser &...  T100 & Tundra Forum  Tacoma Forum  Toyota Tech ArchiveJeep Forums ------  Jeep Talk  Jeep TechIsuzu Forums ------  Isuzu 4x4 & SUV Talk  Isuzu 4x4 & SUV Tech  Isuzu DieselsKia Forums ------  Kia Talk  Kia Sportage & Sorento TechOff Topic Chat ------  4x4 Gallery  Off-Topic Chat  Recreational Access & Land ...  Politics4xForums ------  Outdoor Gear  General 4x4 Discussion  Tools and Fabrication  General Communications  Amateur Radio  GPS and MapsParts Bin ------  Private Party - Garage Sale  Private Party - Items wanted  Vendors, Hot Deals, Group Buys4x4Wire Back Yard ------  Suzuki Forum  AZ Crawler Crew  Cal-Nev Crew  General Ford 4x4 & SUV Forum  General Dodge 4x4 & SUV Forum  General Chevy 4x4 & SUV ForumFeedback & Testing ------  Problems, Questions, Suggestions4x4Wire Staff ------  Forum Moderators  Problem Threads Print Thread Switch to Threaded Mode 5 Excellent 4 Good 3 Average 2 Bad 1 Terrible View Profile Private Message Follow User Forum Posts View Profile Private Message Follow User Forum Posts View Profile Private Message Follow User Forum Posts

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