My '98 Nissan Frontier has odometer reading of 999999, full fuel hot temp speedo up to20mph tach not right. What's wrong and best place to get parts?

Greetings

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If your temperature gauge reads hot as soon as you turn the ignition on it's probably due to a faulty temperature sender. The link below may show you the location of that sensor:

nissan frontier temperature sender Google Search

The sensor is very easy to change. It just screws into the block. It may have a 'brass' appearance and have either 1 or 2 electrical wires attached.

To change it, simply disconnect the wire and then use a wrench to unscrew it.

Unless the head gasket is leaking, I would think you are looking for something electrical that is not working when hot, or a fuel problem.
Do you know if you have spark and fuel pressure when it will not start ?

Chris i would suggest changing the cluster out i had a tach problem and that fixed it. As for the other things did it all happen at once?

No help but my gauges stopped working at about the same time on my '98 Frontier. So far, the fuel, temp., speedometer, odometer and trip gauges don't work or some work at different times after starting the engine.

My gas guage, speed odometer and tempiture does not work
The speed odometre is reading 9999999 what should i do

since the odometer reads such a high meter rate. it should be old atleast for 3 to 4 years. you have to replace the odometer "worm ", inside (i dont know there might be a different name for that part in your country). you have to contcact a repairman and get it done.

it's your cluster

Your dashboard circuit is probably burnt out. The same thing happened to me, it's like a $20 part but is about $60 with installation, check with a dealer though.

Common problem with these units. We have been repairing them successfully for over 10 years. Visit http://www.mrwhizard.com for more info.