Sub-throttle position sensor

dude7580

New Member
Hi guys,
I wanted to adjust my Throttle position sensor and because of my big mechanic skills, I accidently moved the Sub-throttle position sensor thinking it was the TPS.
I put it back to the way it was by realigning the white lines together but these sensors are sensible and pretty sure it isn't adjusted correctly now.
Now my sub plates make a weird nose when moving and I'm afraid that's because I messed with the sensor. Noise is like the following video: https://www.youtube.com/watch?v=iuW5-_3MTwA

I read the service manual and in order to adjust that sensor you need a digitsal circuit tester.

Has anyone ever had to adjust that sensor?

Any help would be very appreciated.

Thanks
 

FZ1inTX

Adminstrator
Do you have OEM sub-throttle plates or modded? If they are modded then the adjustment doesn't matter. ;) If not, mod the plates to about 38mm diameter and forget about them. :tup:
 

dude7580

New Member
Do you have OEM sub-throttle plates or modded? If they are modded then the adjustment doesn't matter. ;) If not, mod the plates to about 38mm diameter and forget about them. :tup:
I put back the stock plates after having my ECU flashed.
I thought that sensor controlled more than those sub-throttle plates like the plates further down the cylinder.
 

FZ1inTX

Adminstrator
I put back the stock plates after having my ECU flashed.
I thought that sensor controlled more than those sub-throttle plates like the plates further down the cylinder.
Is this Ivan's flash? Is so, there's no need to worry about the flies as he's got them opening sooner and they may, in fact, never fully close but you'd have to ask him.

I have his flash and left the modded plates in as his dyno charts showed no difference. ;)
 

Ivan_IPP

Member
The noise you are hearing is the motor trying to drive the subs more than the linkage will allow.... you need to adjust this before you damage the motor.

Please get the pages from the service manual and follow them before you damage something.


Ivan
 

dude7580

New Member
The noise you are hearing is the motor trying to drive the subs more than the linkage will allow.... you need to adjust this before you damage the motor.

Please get the pages from the service manual and follow them before you damage something.


Ivan
Now you got me scared. Im going to open the tank and try to fix. The problem is i dont have that digital circuit tester so mightneed to take to dealer for that.
 

Ivan_IPP

Member
You don't need any tester....

You just need a caliper to measure the position of the throttle plate....

Just loosen the screws on the sensor and turn the key on... move the sensor until you get the required measurement between the throttle plate and the throttle body.... then re-tighten the screws


Ivan
 

dude7580

New Member
You don't need any tester....

You just need a caliper to measure the position of the throttle plate....

Just loosen the screws on the sensor and turn the key on... move the sensor until you get the required measurement between the throttle plate and the throttle body.... then re-tighten the screws


Ivan
Thanks Ivan, I'll go get a caliper and try that.

Is that the measurement "a" in the picture?
 
Last edited:

Ivan_IPP

Member
That's one of them.... there is another one that you need to check and adjust first... if you never touched the adjustment screw for the max open adjustment, then don't touch it please.

Be concerned with the other (minimum position) measurement first, and use the sensor to get your measurement within spec.

Then check the max open measurement afterwards.
(should still be ok if you haven't touched the adjuster screw.)

This whole thing shouldn't take more than 5 minutes after you remove the airbox.

Good luck, :)

Ivan
 
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