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Old 02-03-2002, 12:08 AM   #1
gingerbread man
Scooby Newbie
Member#: 12712
Join Date: Nov 2001
Location: Scenic (ha-ha) Nitro, West Vir
1993 impreza wagon
L. blue (rolled my WRX)

Default ECU problems??

Speedometer reads 60 mph when I am sitting in my driveway, then jumps around 20mph in both directions at highway speeds. When decelerating, the tach goes to zero and the CEL flashes. The coolant temperature light twitches like its on acid and I am getting 18 miles per gallon without ever allowing the car to come under boost. Anyone else have problems like these?
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Old 02-03-2002, 12:01 PM   #2
Scooby Newbie
Member#: 12012
Join Date: Nov 2001

The ECU does not control the speedometer. The speedo is electronic and gets a signal from a sensor in the tranny. That signal is then sent to the ECU. You may have a speed sensor or speedo head problem, or an electrical wiring problem. A bad speed sensor signal to the ECU will cause running problems and trip the MIL (what you refer to as the CEL).
Have you added any gauges or anything else electrical to the car? Any mods done with the ECU or wiring? If it's stock and still under warranty, bring it to your dealer for diagnosis.
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Old 02-05-2002, 09:48 AM   #3
Scooby Newbie
Member#: 14709
Join Date: Jan 2002
Location: St. Paul, MN
Default Wierd?

Does your car rack mileage from just sitting in the driveway too? I assume it would if your spedo thinks you are doing 60. I would get it fixed ASAP and mention an extension to the warrenty due to the fact there are miles on your car that you didnt actually drive.
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Old 02-05-2002, 02:28 PM   #4
Scooby Guru
Member#: 7374
Join Date: Jun 2001
Location: North Bay, SFCA
2007 Grandpamobile

Question Is this a joke?

If it isn't, get your car into the shop ASAP, your car is whacked.
Stanley is offline   Reply With Quote

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