jkp1187 -
Quote:
Originally Posted by jkp1187
You lost your cruise control just by plus-sizing the tires? I've never heard of that before. What happened?
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[EDIT: I mistyped in my above post. I meant when I changed my gearing, not my tires. This response is about changing *gears*]
(This is only intelligent speculation on my part, because I don't have the source code)
The OEM Saturn Cruise Control will only engage in the top gear. The ECU/PCM looks for a 5th gear MPH/RPM combination (or ratio?) that is above 25 MPH. Because I reduced my 5th gear RPMs, the ECU/PCM never sees an MPH/RPM combo that "qualifies" for CC. The end result is that the ECU/PCM ignores my CC request.
There was never an aftermarket for reprogramming Saturn S-Series ECU/PCMs, so it's not easy to fix.
CarloSW2