Tachometer

[charlesranderson]

Love my 91 LS400, but there are issues from time to time. One seems to be that the tachometer seems to be slowly starting not to work. At 62 mph, the tach shows about 1050 rpm's--at first I thought, "what a great car!". While I still think the car is great, I wonder if maybe the tach is not showing quite all of the rpm's.

Is this a common problem? Is there a reasonable fix?

Thanks for your help.

[jzz30]

is that 1000 rpm's off the throttle or on? why dont you try a full throttle shift from a stop. it should go all the way or very close to redline.