EGR valves

[David A. Cooley]

At 10:34 AM 3/20/99 -0800, you wrote:
>GM has some "linear" egr valves.  It has pintle position feedback
>(something like a potentiometer).  It is controlled by a pwm signal (I
>don't know the frequency) from the ecm.  One app that used this is a '92
>S10 4.3L vin W (not sure about the 4.3L vin Z, and many parts stores don't
>even list the vin W).  There is no vacuum assist on this egr valve.

The 94/95 Buick Lesabre VIN L uses the same thing... I think all the newer
vehicles went to the linear EGR, as it's more accurate to control than a
vacuum operated valve

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           David Cooley N5XMT           Internet: N5XMT at bellsouth.net
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