Speedometer not working
Does it hang out at 18-20MPH, regardless of your speed?
Mine did the same thing. The problem was an open circuit inside the gauge itself, and there's no repair for the parts. You'll need to get a replacement speedometer gauge, or simply buy a replacement instrument cluster.
If it's not doing the "20mph" thing, then it's possible that you just need a new engine speed sensor. This is located on the rear of the engine block, and is hard but not impossible to reach and replace.
One way to test is to set the car on cruise control when the speedometer is working. If the speedometer cuts out ,but the cruise is still able to maintain your speed, then the sensor is OK and the problem is the gauge. If the cruise control also cuts out, then the sensor is bad.
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