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speedie

speed sensor gear colors

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i had to replace my speed sonsor recently from my s14 gearbox. I took the usual red colour one out, but the replacement i was given had a blue gear pinion on it. Now my speedo reads about half the speed it should.

 

I didnt take a photo before it went in, but does anyone know what the blue colour gear pinion might be ?

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Different colours refer to the amount of teeth not sure how many to the different colours put the red back in and it should fix your problem

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if anyones interested, these are the 2 speed sensors i have. the Red one is from an S13, but im still not sure what the Blue one is from but the cogs are quite different.

 

post-108666-0-46506500-1366939611_thumb.jpg

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s13 red cog and has a wiring before plug

s14 (blue or purple cant remember) no wiring come off it and reads half of a s13 one

 

Ie put a s14 sensor to s13 cluster it will read half of what you are actually doing

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There would have to be something different internally as well; there is only two teeth difference between the gears so that wouldn't account for a 50% reduction in the indicated speed, more like 10%. So there must be a difference in the pluses per revolution sent by the senders as well.

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Anyone able to swap the gears between senders To correct small errors

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S13s have a pot in the cluster to calibrate speedo

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