I also have a very familiar problem. My speedometer is fine but my RPM meter just go krazy up and down
..and it dead most of the time. My engine light also on. I went to check they said SPEEDOMETER CIRCUIT MALFUNCTION. and they guys freaking wanted $360 to fix the whole thing. he said " if i replaced the gauge it stil wouldn't work"
any1 in here knows how to fix it and where to buy part (or wat the part called) so maybe i can save a bit beter that why
thnx alot