Oil Pressure Sending Unit out...Q's on replacement?

[rcsupra]

Hey all,

I have a question concerning the oil pressure sending unit on my 7M-GTE. I searched the above and came up with some info but not enough I feel for my particular question.

Basically, I feel that the sender has gone out on my car. The stock gauge is all over the place....sometimes it'll sit on 40 at odd times, others it'll be dropped at 0 when cruising down the highway. I inspected the unit today; I noticed it was right near the filter, the wiring looked OK, so I figure the unit just failed.

My question concerns what others have done about it. What aftermarket gauges have you switched to? Did you re-use the factory location on the block? What is needed to adapt an aftermarket sending unit? Etc etc. Also, how big of a job is it? I notice from my TSRM that you'd have to remove quite a lot to really get to it.

Any and all tips/pics/etc you could give me would be greatly appreciated :1zhelp:

 

[shaeff]

if you remove the intake hose, and filter, you can get at it pretty easily if you're nimble. i can't remember how i did mine. i might have gone from underneath.

 

[Bill UK]

There’s only one wire connecting to the top of the sender unit, may be worth checking. The sender unit screws into the bock, not sure of the size though.

 

[j3pz]

im in the process of installing my prosport oil pressure gauge and was wondering if the ecu uses the signal from the sending unit. i dont remember reading anything to say one way or the other but pretty sure it does not.

 

[jetjock]

^ It does. For idle control. You may or may not notice a change without it though. The usual symptom is an occasional lower idle by 50 rpm or so. Depends on what you do with the input.

Bill: It's 1/8 BPT. From your side of the pond.

OP: Sounds like a bad connection. You may want to check the wiring first. The service manual has the procedure. Or just ground the sender wire and see if the gage goes to max. Don't leave it grounded too long though...

 

[j3pz]

thanks for the reply jj. didnt want you to think your help here isnt appreciated

 

[rcsupra]

Thanks for the replies everyone, I'll make sure to check that wiring again. Are there any others out there who have replaced theirs? And if so, could you detail the process you undertook? Thanks again

 

[figgie]

as Jetjock stated, 1/8 BSPT (Tapered). Easily found everywhere in the world execpt in USA. Very hard to find here

With that said. to replace. need another toyota one as that oil pressure sensor is a digital one (ie pulse not analog 0v-5v as it is typical). This means unless you are standalone, run the OEM oil pressure sensor in there.