My rpm and mph tachometer don't move, temp gauge is not working/reading properly car was sitting for 1 day off while I replaced the p.s pump and pressure hose. temp tachometer is at the first marking reads that the engine is hotter than it actually is. has anyone had this problem?

 

Did it do that all the sudden or what? Time to send it to Tanin.

 

I just got the car I don't know how long

 

Thank you for the referral Dicer!

To PJG94, We would be happy to help you out with the cluster on the '91 LS400.

Check out the repair service on our website here:

http://www.taninautoelectronix.com/1...ter_repair.htm

Let us know if you have any questions. We are happy to help out and we take great care of our CLub Lexus friends!

 

THELEXPERT@GMAIL.COM IS ANOTHER OPTION. jim walker

 

I've been having issues with my cluster as well. In the heat, the speedometer and RPM gauges stick to the bottom.Also, my temp gauge only barely reaches the first notch, and if i bang on my dash to get the speedo and RPM gauge to bounce up, it knocks the temp gauge down even further. Not sure if I need a new thermostat, or a new gauge cluster? Or maybe its an ECU problem like I've read about from several other people on here. Either way, I think it's important to know what my engine temp is. Any suggestions other than sending it in to get fixed, which is my last resort as a broke college student?

 

When it's hot out, the heat and humidity makes the grease in the tach and speedo needles very sticky. Very common problem.
As for your temp gauge only going up a tad, it sounds like your thermostat is stuck open which doesn't let the engine get hot. That could very well be your no heat problem you have in the other thread you started. ( Heat won't work 94 LS) http://www.lexls.com/tutorials/cooling/thermostat.html

 

Thats what I'm suspecting, and I didnt know that could affect the heat as well. Thanks for the helpful info! I'll be ordering a new thermostat.

 

This should be in your other thread about the heat, but yea, the thermostat is very important because when it's stuck open the engine temp stays cooler then it's supposed to be. That's why, back in the day, we used to remove them in the summer. (before ECUs) But now engine temp effects so much with all the sensors sending signals to the ECU so it can adjust the way the engine runs.