Oil temp sensor

[Hooli]

Chaps, I think I've found why my bike is so thirsty. It appears it's probably thinking it's running stone cold all the time, which also explains why it seems to take too long to come off fast idle these days.

I've been going through checking the sensors that can affect the fueling & the oil temp sensor (13650-42F00) seems to be reading way to high a resistance. From the table below would you agree a rough figure of 150-200 KOhms would be about right at 10c? cause my sensor is reading about 1,100KOhms which seems way way too high to me.

I'll bring it inside to check at nearer to 20c over the weekend, but to get it out I need to remove that oil pipe up the back of the barrels for access & the bolt I can get too on the sensor is very reluctant to come undone. So I'm not starting that task tonight.

[seth]

Good luck buddy
Hopefully you getting to the bottom of your excess fuel drinking problem .

[Hooli]

It might explain some other peoples too, as I know it's running rich from the black plugs. It's even across all four plugs which proves it's fueling not spark related.

[Irish in Oz]

It's not a linear scale, so I would say approx 180Kohms at -10 degrees C and about 110Kohms at +10 degrees C.

You are confusing with your decimal places(zero's), so basing it on ambient temp in UK at present about +10 degrees C the sensor would seem to be OK to me.

[Hooli]

It's not a linear scale, so I would say approx 180Kohms at -10 degrees C and about 110Kohms at +10 degrees C.

You are confusing with your decimal places(zero's), so basing it on ambient temp in UK at present about +10 degrees C the sensor would seem to be OK to me.

Ta, I realise it's not linear scale hence my guess at what the figures would be.

I get your point on scales, but with my meter set to 200K Ohms it goes off the scale (shows '1' on the display) so I don't think I am. Setting it to 2M gives 1.1xxx as a reading.

I know a couple of other 14s locally & saturday I'll get some readings off them to compare, if they are wildly different I'll know my sensor is shot.

[T 24]

I have problems with that same sensor. I think it's in wrong place, what makes it too slow.
Cylinder head and pistons are heating up much quicker than sensor in oil flow => engine runs too rich some miles, and vice versa,
when you start after half an hour coffee break,
cylinder head has cooled down, but sensor in the middle of gear box is still hot => engine runs too lean for a while,
until heat has become steady.
Lambda sensor controlled ECU would be the solution, but 14 is too old...

[Irish in Oz]

@Hooli

It should not go off the scale at 200k so there might be something wrong with the sensor.

[Eric GSX1400K3]

Seems to me if its off the scale  at 200k ohm,  you have infinite resistance and therefore a shagged sensor (in technical terms)

[Snorre Kristoffersen]

In the old days I had the same problem with my first 1400. I learned from reading technic litterature on the Suzuki FI systems that the choke e function was all relying on oil temperature. The Choke was not fully off until reaching apx. 75 degC as I recall... After that I covered up mostly of the BIG oil cooler and things were a lot better. I even kept the cover after converting to 1550 wo any problem. I monitored the oil temp with Yoshi tem meter, and can not recall temps over 105 degC at any time!

[Hooli]

Seems to me if its off the scale  at 200k ohm,  you have infinite resistance and therefore a shagged sensor (in technical terms)

Aye that's my thinking, I'll be checking a mate's 14 tomorrow to confirm theirs gives different readings before I buy a new one.

[Irish in Oz]

And make sure all the connections are good.

[Hooli]

And make sure all the connections are good.

I tested from the first multiplug before the sensor, there's nothing except the sensor wiring from there onwards. As far as I'm aware the only other multiplugs are the big grey one under the LH side cover & the ECU plug.

[Hooli]

Update for this, I'm pretty convinced my sensor is faulty. I tested a mate's 14 today & his was showing just under 100 KOhm at 12-13c, so mine has to be faulty to be showing 1,100 KOhm just a few degrees colder.

New sensors are about £130 from Suzuki, but if the new one does almost 20 years like this one did then it's not a bad price. I'll get one ordered up & should be able to prove the issue is fixed some time in January.

[Irish in Oz]

Seems about right based on my calculation in my head from reply#3.
How long do you think it will take to pull back the money on the extra fuel used

[Irish in Oz]

In the manual they seem to imply be very careful on installation of the oil temperature sensor seems to be prone to easy damage.