i have a 96 s-10 blazer Lt and its wierd the tach seams to work fine but every now and then it seams to dance around even when staying at a stedy speed it only moves like half a noch to a noch say from around 2000 rpms to 2001 somting like that just wondering any one had any clues why it would do that? poor tire tread ? i dont know well if any one does it would be great thank you

 

You know I'm having the same problems on my 98 Lt, at a steady pace on the road just feels like it wants to switch gears or something. I took it to Cottman Transmission and was told my torque converter is going bad. Of course, I also had problems with going into reverse.

 

Just asking, where did you mount your rpm gage?
I was thinking of sticking one on my a pillar.

 

They may have the stock, in-dash, tach...

 

Oh, right. The LT has a tach in it already. LS doesn't have one. I don't know why. It's really annoying not knowing when you're redlining. Wastes gas and puts too much wear on the engine. I've already had a crankshaft bearing rip itself apart.

 

um this may sound stupid because i dont know a lot about newer cars. all of my meager expertise is in things older than me. here goes. when i bought my truck the speedo didnt work and i had to replacethe speedo cable. actually i had to do it twice because the first one layed on the exhaust pipe and melted. anyways before i fixed it sometimes it would twitch a little like i wanted to work but there was a loose connection. is there a cable like that on yours that maybe is loosening?
feel free to correct me if im wrong and good luck.

 

Tach is feed info from the distributor.

 

thank you every one i still havent found out what it is but ill look into these things and i do have a stock tach in the dash just had my driveshaft fall out the other day on the way to work the universals were shot so maby that the tach pro was my trucks way of tell me something was wrong that the universals were going i dont know