tach maxed out, please help
 

91 rs 305 v8. well my tach is all the way at the max and i was hoping some1 can tell me how to fix it. when i crank my car it comes down to like 3k rpms and then goes all the way back up. any input would be greatly appreciated.

Is it just the tach not working, or is your engine actually revving that high?

no just the crazy tach. engine runs fine.

By now, a malfunctioning tach is almost considered "normal" for the 90-92 Camaros. Mine used to read about double, and I learned to just live with it. Kept my math skills sharp! ;)
http://www.thirdgen.org/techboard/el...eter-fix.html?

i wouldnt mind if it was off some but its continuosly maxed, it only moves when i start the car. would taking the cluster off and manually moving the needle back down do anything?

It's an electronic problem, not a physical one. Moving the needle isn't going to fix it. Besides, yours still drops to zero with the key off, right? You would be better off trying to find another tach on ebay and swap yours out. Since it's a common problem, be sure to get one from where the seller took it out of his own car, and will guarantee you that it reads accurately.

thanks for the link too. i work at radioshack so ill buy the resistors on monday. cant wait for my tach to work right.

nope the needle stays maxed outor pegged whatever you call it always. never comes down.

That's weird! Have you tried hitting it with a hammer? :)
So it stays pegged with the key off or on? But goes down to 3k when you crank the engine? It's almost like it's working backwards from how it should! What happens with the needle if you disconnect the battery?

im pretty sure it stay the same but ill check it later today. thats why i thought maybe since its always maxed out it was a physical problem...