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Weird speed sensor related issue...

Any problems with your Altezza, post questions here
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Joined: Mon Dec 17, 2018 1:53 pm

Weird speed sensor related issue...

Postby SH-farenheit » Fri Jan 25, 2019 9:18 am

Hello guys !

As I've said in my newbie post, I'm currently finishing a beams manual swapped is300. The car was originally an automatic, but the engine and gearbox conversion wasn't made by me, but a close friend. Now, the car has had some weird issues from the start : misfires, hesitation under full throttle and rough idle. I tried everything : coilpacks, spark plugs, vvti solenoids... Everything turned out fine but the misfires were still there.

One day, I realized the car only had such symptoms while driving. At a full stop, no misfires, no hesitation whatsoever. So I took the speed sensor out, and the car ran perfectly fine : no more hesitation, she had her full power, and went through the RPM like a rocket : Proper beams 3SGE performance, finally !

So now, i'm stuck with a perfectly working car, but no speedo whatsoever, and knowing that a sensor is missing kinda puts me off. What do you guys think would be the issue here ? A faulty sensor ? A damaged ECU wire ? or even a wrong pinout ?

I'm kinda stuck here and have gotten to my limits on this car's knowledge, so your help would be greatly, greatly appreciated !

Cheers to you all, have the best of days :)

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