yes, an rx7. 87 TII


was driving home from my buddys shop after having just done my clutch and noticed that i the oil pressure gauge was reading 0.


I don't have a pressure tester here, any work around ways to quickly test to see if there is any at all, or do you suppose its just I knocked the wire off the sender, or something along those lines.

 

when its shut off, grab an oil cooler line and see if you can squeeze it, then start it up grab the same oil cooler line and see if its hard.

Hard oil cooler line means oil pressure.

Yay!

 

the same exact thing just happened to me, im working on it right now

 

I used RPM's little trick.. oil pressure seems primo. must just be a broken wire.

 

Yes....I win!

 

i think mine is because the capacitor under the slave cylinder fell off, and my friend who was helping me decided to ground it so i think i need to replace that and see what that will do, is your capacitor hooked up?

 

I just did my clutch, which means I was messing with the wiring harness that the wire for the oil pressure sender runs through. I probably just broke the wire or something along those lines.

you *should* be able to do an ohm load test on your pressure sender to ensure it actually works.


did you try RPM's trick to see if you actually have oil pressure?

 

This may be off topic but I'd just like to let you know that no rx7 is a terrible car!

 

you can't just ground the wire. you have to have the capacitor or else it will just peg the gauge out. and eventually fry it

 

i know, he grounded it and thats what he does so im thinking i need to replace the complete unit

 

they are 12 bucks at Mazdatrix..for that wire with the capacitor on it.

 

ya ive got a friend with a capacitor that im getting tomorrow so ill be throwing on tomorrow

 

do you have a link for that? i've searched thier site and can't find it anywhere. i too have this problem and need a new one. i have a two wire one but i don't know if it will work. would be nice to get a new one.

 

I found the broken wire this morning, fixed it and the oil pressure gauge is working properly again.

 

which wire did it end up being?

 

the wire on the end of that clip that slides sideways onto the pressure sender. i think it was red and green?

 

i hate that stupid clip it always falls off on me while im driving. which is an issue because one of these time its going to be an actual problem and im going to ignore it. anybody come up with any tricks of getting it to stay on better. i have figured anything out.

 

Its a resistor not a cap by the way... lol

 

my issue is completely opposite
my oil pressure gauge climbs to the top once car is started
is this normal?
should i be worried?

 

Assuming we are talking about the small black box on the end of a short black wire that connects to the oil pressure sender wire, it is most certainly a capacitor. 0.01uF, 350V as I recall. There is another at the trailing coil for the tach.