[Jubz786]

Current problem with my JDM crx 1990 is that the fuel sensor is not working (assume this a gauge is constantly showing empty)

I removed the sensor but looking to buy a part, the connection seems different to online sellers of crx sensors
Any advice or recognise this, pics below
Thanks

 

[AttackCRX]

Just cut and solder the new sensor onto the old connector wires.

 

[Jubz786]

Just cut and solder the new sensor onto the old connector wires.

Hi thanks for the advice would that work, my sensor seems to have two wires 🤔

Online crx ones have a green connector and look alot more simpler than my current one (pic below)

Also would a civic 90-93 sensor be compatible seems to have a similar or same head type, white connector

(pic below)

 

[mossin_90]

Did you test it with a multimeter tool?

 

[Jubz786]

I need to get around to that, what readings would I expect?

 

[mossin_90]

105-110. ohms Empty
25.5-39.5. ohms 1/2 tank
2.0-5.0. Ohms Full

For Si and Base models
The unit should be flat @ 180 deg or 0 deg flat surface. As if sitting on the fuel tank.
At Full mark the center of the rod part going inside the plastic float should be at 45mm or 1.8" from flat 0 degrees(top of tank). From the base of the of the unit, the one that sits on the fuel tank( rubber seal).
@ 1/2 mark 93mm or 3.7" from base of unit.
@ Empty 144.5mm or 5.7" very close to bottom of tank but not resting on it.

HF model

Full Tank. 54mm or 2.1" from base of unit
1/2 Tank. 97.9mm or 3.9"
Empty Tank. 144.4mm or 5.7"

Sorry I cant post pics. No host services. Apps installed.

If another member can post it its On the service manual page 602
Or 23-96(corner numbers on pages).

You can try cleaning yours first or save that time and effort and buy a new one.

Hope this helps.

 

[Jubz786]

Hi all, so I just checked (haven't used the voltmeter yet) but it's now stuck on half.

I even disconnected the battery and still stuck in half?

So not sure what's going on. Was on empty before but left for couple days an noticed it's on half now

I thinking off cleaning the sensor again when I get a chance

Any other ideas?

Thanks guys

 

[mossin_90]

If you test the wiring coming from the tank with a multimeter at the plug behind the dash cluster AND you get the right values( see my previous post) either:

A Blown fuse

a plug got loose,

you have a bad connection or ground for the cluster

or ultimately temp gauge electrical system is busted.

 

[Jubz786]

Thanks for the help, going to be a fun Xmas weekend. My temp gauge works perfectly just the fuel one is acting up.



See how it goes this weekend 👍

 

[Jubz786]

So had a play around with the fuel sensor, did give some ohms readings but notice upper connection didn't seem to give clear readings, cleaned it up and put it back into the fuel tank. Thinking may need a new one
But when turned inhibition key, It went near the full mark (not fully full)

When even with ignition off it's stuck there (I know the fuel tank is nearly full so looks like realistic reading)

But wouldn't it settle after ignition is off?

Thanks

 

[mossin_90]

Dont quote me on this one. Lol

But I think there is a resistor or something behind the gauge itself that keeps the neddle from bouncing like crazy while you turn, brake... if that is true there might be a chance its bad.