I was driving trhough town and my RPM needle suddenly went to 3000 RPM but my engine didn't rev up any, it ran better than ever before. Before it was idling anywhere from 500 to 800 and jump to 1000 then back to 500 RPM. It's the LB9 stock engine. What do you think this might be? Why would the RPM gauge do this? Any help greatly appreciated...

 

IT'S POSSESSED, you are gonna have to call an exorcist.

Well no, not really. The only thing I can think of is that one of the wires shorted out and is getting a constant voltage input to the TACHOMETER a.k.a. RPM gauge.

Later,
Jesse

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85 Z28, 305 TPI A4
pretty stock with a few toys
15.2@91mph
http://photos.yahoo.com/j_hougnon

http://screamindeamin.cz28.com/images/jesse/

 

I can see that happening, but why would the engine start idling better than it has in months?

 

well i could be that your system was drawing too much current from having a short... thus making the spark irratic...

so when the wire shorted through, it may have caused the drain on the electircal system to stop... thus restoring proper voltage to the coil and giving better spark...

later,
Chris