Would any of you guys know why my tachometer reads 2700 rpm when my engine is idling at 900? On the way home today, it stayed there, then revved up to about 4gs while I was accelerating (5 spd) then after I shifted, it went back to 2700. It dropped back to normal right before I got home, and behaved after that. I'm thinking a loose connection (or maybe a ground) but any idea where to check? The engine runs fine, but this is annoying. It just started today. Anybody?
'92 LX 5.0 5 spd
'92 LX 5.0 5 spd