Jonas240z Posted August 8, 2003 Share Posted August 8, 2003 Hello guys! I'm a new person in the automotive world and i got a quick question for you. My tachometer goes crazy while i'm driving...the problem is that it starts to mark high revs, even tough the engine is still running at a normal speed. It increses the revs more and more the more I drive it. This happens while cruising and while the engine is on idle. One thing that i noticed is that it only does it when is really hot outside (ugly San Antonio weather ) So what could be causing this? and what can I do to fix it? Any help will be appreciated. Thank you for your time. By the way my car is a 1973 240z, it has headers and 1972 carbs. Quote Link to comment Share on other sites More sharing options...
Tim240z Posted August 13, 2003 Share Posted August 13, 2003 The tach is messed up. get another one or have this one rebuilt. I had a very similar problem on mine....only when it was really hot out. Tim Quote Link to comment Share on other sites More sharing options...
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