Starter Tooth Sensor Question

Programmer nwester at eidnet.org
Fri Dec 14 09:00:24 GMT 2001


Here's a couple...

GM OE# 1004771 has 153 teeth. No weight (Some 305 Pontiacs)
GM OE# 25501868 has 131 teeth. (Some 3.8L Buicks)
Another has 135 teeth on a 4 cyl 1.8L Buick (who cares, right ?)
153 teeth on some 92 305 truck chassis, too--so one would have to be sure.

Lyndon.

----- Original Message -----
From: "Orin" <orin at diy-efi.org>
To: <diy_efi at diy-efi.org>
Sent: Thursday, December 13, 2001 12:13 AM
Subject: Re: Starter Tooth Sensor Question


> > Kinda surprised nobody's mentioned all the available
> > tooth counts....148, 160, 162, etc...wouldn't this be
> > an added nightmare ?
>
> Only if it's not a multiple of the number of cylinders/2.
> IE. you have an integer number of teeth between each firing.
>
> Running some numbers on the Audi 5 cyl engines:
>
> 135 teeth - so 270 per cycle, 72 between each cyl firing.
> Resolution is 360/135 degrees - or it would be if they
> didn't use BOTH edges of the tooth signal - giving a resolution
> of 360/270 or 1.33 degrees.
>
> Orin.
>
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