2002 Grandprix mirror display and trip computer info

My mirror always shows either south or southeast regardless of what direction. The trip computer shows less gas used than I actually did, thus the mileage and miles to empty are wrong.

What could cause this?

Thanks

Reply to
Ted
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If by "mirror" you mean the "compass", then it might need to be recalibrated. Also, any large magnet's (sub's, speakers, etc.) near the cars trunk (IIRC) can knock the compass off. As for the trip computer, I couldn't tell ya.

Reply to
80 Knight

For the mileage computer, try a bottle of Techron fuel-injector cleaner. I think sometimes dirty fuel injectors don't close completely and they drip excess fuel into the motor that the computer isn't aware of... so it reports less fuel used that what actually went into the motor. My computer worked much better (within 0.1 gallons of actual) for a few tanks after cleaning the injectors... but has slowly gotten worse (off by about a gallon per fill-up) again. I think I need to run them through the real ultrasonic injector cleaner. The other thing that could screw it up is if your fuel pressure is a little to high. The injectors will spray more fuel than the computer thinks they are... so it will come up short on the "fuel used" calculation. I would try Techron injector cleaner first... then have the fuel pressure checked if that doesn't help.

"Ted" wrote in message news:yBu_i.3407$ snipped-for-privacy@bignews8.bellsouth.net...

Reply to
David Courtney

Thanks, I will try that.

Reply to
Ted

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